Merge tag 'upstream/1.5.0+dfsg'

Upstream version 1.5.0+dfsg

63 files changed, 3447 insertions, 11964 deletions

diff --git a/python.d/Makefile.am b/python.d/Makefile.am
index d769e313..883f06c4 100644
--- a/python.d/Makefile.am
+++ b/python.d/Makefile.am
@@ -1,46 +1,58 @@
 MAINTAINERCLEANFILES= $(srcdir)/Makefile.in
 CLEANFILES = \
-	python-modules-installer.sh \
-	$(NULL)
+    python-modules-installer.sh \
+    $(NULL)
 
 include $(top_srcdir)/build/subst.inc
 
 SUFFIXES = .in
 
 dist_python_SCRIPTS = \
-	apache.chart.py \
-	apache_cache.chart.py \
-	cpufreq.chart.py \
-	dovecot.chart.py \
-	example.chart.py \
-	exim.chart.py \
-	hddtemp.chart.py \
-	ipfs.chart.py \
-	memcached.chart.py \
-	mysql.chart.py \
-	nginx.chart.py \
-	nginx_log.chart.py \
-	phpfpm.chart.py \
-	postfix.chart.py \
-	redis.chart.py \
-	retroshare.chart.py \
-	sensors.chart.py \
-	squid.chart.py \
-	tomcat.chart.py \
-	python-modules-installer.sh \
-	$(NULL)
+    apache.chart.py \
+    apache_cache.chart.py \
+    bind_rndc.chart.py \
+    cpufreq.chart.py \
+    cpuidle.chart.py \
+    dovecot.chart.py \
+    elasticsearch.chart.py \
+    example.chart.py \
+    exim.chart.py \
+    fail2ban.chart.py \
+    freeradius.chart.py \
+    gunicorn_log.chart.py \
+    haproxy.chart.py \
+    hddtemp.chart.py \
+    ipfs.chart.py \
+    isc_dhcpd.chart.py \
+    mdstat.chart.py \
+    memcached.chart.py \
+    mysql.chart.py \
+    nginx.chart.py \
+    nginx_log.chart.py \
+    ovpn_status_log.chart.py \
+    phpfpm.chart.py \
+    postfix.chart.py \
+    postgres.chart.py \
+    redis.chart.py \
+    retroshare.chart.py \
+    sensors.chart.py \
+    squid.chart.py \
+    tomcat.chart.py \
+    varnish.chart.py \
+    python-modules-installer.sh \
+    $(NULL)
 
 dist_python_DATA = \
-	README.md \
-	$(NULL)
+    README.md \
+    $(NULL)
 
 pythonmodulesdir=$(pythondir)/python_modules
 dist_pythonmodules_DATA = \
-	python_modules/__init__.py \
-	python_modules/base.py \
-	python_modules/msg.py \
-	python_modules/lm_sensors.py \
-	$(NULL)
+    python_modules/__init__.py \
+    python_modules/base.py \
+    python_modules/msg.py \
+    python_modules/lm_sensors.py \
+    $(NULL)
 
 pythonyaml2dir=$(pythonmodulesdir)/pyyaml2
 dist_pythonyaml2_DATA = \
diff --git a/python.d/Makefile.in b/python.d/Makefile.in
index 426f43ed..018e8b3e 100644
--- a/python.d/Makefile.in
+++ b/python.d/Makefile.in
@@ -1,7 +1,7 @@
-# Makefile.in generated by automake 1.14.1 from Makefile.am.
+# Makefile.in generated by automake 1.15 from Makefile.am.
 # @configure_input@
 
-# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+# Copyright (C) 1994-2014 Free Software Foundation, Inc.
 
 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -16,7 +16,17 @@
 
 
 VPATH = @srcdir@
-am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
 am__make_running_with_option = \
   case $${target_option-} in \
       ?) ;; \
@@ -79,10 +89,6 @@ PRE_UNINSTALL = :
 POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
-DIST_COMMON = $(top_srcdir)/build/subst.inc $(srcdir)/Makefile.in \
-	$(srcdir)/Makefile.am $(dist_python_SCRIPTS) \
-	$(dist_python_DATA) $(dist_pythonmodules_DATA) \
-	$(dist_pythonyaml2_DATA) $(dist_pythonyaml3_DATA)
 subdir = python.d
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/ax_c___atomic.m4 \
@@ -90,10 +96,15 @@ am__aclocal_m4_deps = $(top_srcdir)/m4/ax_c___atomic.m4 \
 	$(top_srcdir)/m4/ax_c_mallinfo.m4 \
 	$(top_srcdir)/m4/ax_c_mallopt.m4 \
 	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
+	$(top_srcdir)/m4/ax_gcc_func_attribute.m4 \
 	$(top_srcdir)/m4/ax_pthread.m4 $(top_srcdir)/m4/jemalloc.m4 \
 	$(top_srcdir)/m4/tcmalloc.m4 $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
+DIST_COMMON = $(srcdir)/Makefile.am $(dist_python_SCRIPTS) \
+	$(dist_python_DATA) $(dist_pythonmodules_DATA) \
+	$(dist_pythonyaml2_DATA) $(dist_pythonyaml3_DATA) \
+	$(am__DIST_COMMON)
 mkinstalldirs = $(install_sh) -d
 CONFIG_HEADER = $(top_builddir)/config.h
 CONFIG_CLEAN_FILES =
@@ -151,6 +162,7 @@ am__can_run_installinfo = \
 DATA = $(dist_python_DATA) $(dist_pythonmodules_DATA) \
 	$(dist_pythonyaml2_DATA) $(dist_pythonyaml3_DATA)
 am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/build/subst.inc
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
 AMTAR = @AMTAR@
@@ -290,44 +302,56 @@ varlibdir = @varlibdir@
 webdir = @webdir@
 MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
 CLEANFILES = \
-	python-modules-installer.sh \
-	$(NULL)
+    python-modules-installer.sh \
+    $(NULL)
 
 SUFFIXES = .in
 dist_python_SCRIPTS = \
-	apache.chart.py \
-	apache_cache.chart.py \
-	cpufreq.chart.py \
-	dovecot.chart.py \
-	example.chart.py \
-	exim.chart.py \
-	hddtemp.chart.py \
-	ipfs.chart.py \
-	memcached.chart.py \
-	mysql.chart.py \
-	nginx.chart.py \
-	nginx_log.chart.py \
-	phpfpm.chart.py \
-	postfix.chart.py \
-	redis.chart.py \
-	retroshare.chart.py \
-	sensors.chart.py \
-	squid.chart.py \
-	tomcat.chart.py \
-	python-modules-installer.sh \
-	$(NULL)
+    apache.chart.py \
+    apache_cache.chart.py \
+    bind_rndc.chart.py \
+    cpufreq.chart.py \
+    cpuidle.chart.py \
+    dovecot.chart.py \
+    elasticsearch.chart.py \
+    example.chart.py \
+    exim.chart.py \
+    fail2ban.chart.py \
+    freeradius.chart.py \
+    gunicorn_log.chart.py \
+    haproxy.chart.py \
+    hddtemp.chart.py \
+    ipfs.chart.py \
+    isc_dhcpd.chart.py \
+    mdstat.chart.py \
+    memcached.chart.py \
+    mysql.chart.py \
+    nginx.chart.py \
+    nginx_log.chart.py \
+    ovpn_status_log.chart.py \
+    phpfpm.chart.py \
+    postfix.chart.py \
+    postgres.chart.py \
+    redis.chart.py \
+    retroshare.chart.py \
+    sensors.chart.py \
+    squid.chart.py \
+    tomcat.chart.py \
+    varnish.chart.py \
+    python-modules-installer.sh \
+    $(NULL)
 
 dist_python_DATA = \
-	README.md \
-	$(NULL)
+    README.md \
+    $(NULL)
 
 pythonmodulesdir = $(pythondir)/python_modules
 dist_pythonmodules_DATA = \
-	python_modules/__init__.py \
-	python_modules/base.py \
-	python_modules/msg.py \
-	python_modules/lm_sensors.py \
-	$(NULL)
+    python_modules/__init__.py \
+    python_modules/base.py \
+    python_modules/msg.py \
+    python_modules/lm_sensors.py \
+    $(NULL)
 
 pythonyaml2dir = $(pythonmodulesdir)/pyyaml2
 dist_pythonyaml2_DATA = \
@@ -387,7 +411,6 @@ $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(top_srcdir
 	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu python.d/Makefile'; \
 	$(am__cd) $(top_srcdir) && \
 	  $(AUTOMAKE) --gnu python.d/Makefile
-.PRECIOUS: Makefile
 Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	@case '$?' in \
 	  *config.status*) \
@@ -396,7 +419,7 @@ Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
 	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
 	esac;
-$(top_srcdir)/build/subst.inc:
+$(top_srcdir)/build/subst.inc $(am__empty):
 
 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
@@ -689,6 +712,8 @@ uninstall-am: uninstall-dist_pythonDATA uninstall-dist_pythonSCRIPTS \
 	uninstall-dist_pythonSCRIPTS uninstall-dist_pythonmodulesDATA \
 	uninstall-dist_pythonyaml2DATA uninstall-dist_pythonyaml3DATA
 
+.PRECIOUS: Makefile
+
 .in:
 	if sed \
 		-e 's#[@]localstatedir_POST@#$(localstatedir)#g' \
diff --git a/python.d/README.md b/python.d/README.md
index a3c7b4fa..75f5614a 100644
--- a/python.d/README.md
+++ b/python.d/README.md
@@ -125,12 +125,82 @@ If no configuration is given, module will attempt to read log file at `/var/log/
 
 ---
 
+# bind_rndc
+
+Module parses bind dump file to collect real-time performance metrics
+
+**Requirements:**
+ * Version of bind must be 9.6 +
+ * Netdata must have permissions to run `rndc status`
+
+It produces:
+
+1. **Name server statistics**
+ * requests
+ * responses
+ * success
+ * auth_answer
+ * nonauth_answer
+ * nxrrset
+ * failure
+ * nxdomain
+ * recursion
+ * duplicate
+ * rejections
+ 
+2. **Incoming queries**
+ * RESERVED0
+ * A
+ * NS
+ * CNAME
+ * SOA
+ * PTR
+ * MX
+ * TXT
+ * X25
+ * AAAA
+ * SRV
+ * NAPTR
+ * A6
+ * DS
+ * RSIG
+ * DNSKEY
+ * SPF
+ * ANY
+ * DLV
+ 
+3. **Outgoing queries**
+ * Same as Incoming queries
+
+
+### configuration
+
+Sample:
+
+```yaml
+local:
+  named_stats_path       : '/var/log/bind/named.stats'
+```
+
+If no configuration is given, module will attempt to read named.stats file  at `/var/log/bind/named.stats`
+
+---
+
 # cpufreq
 
-Module shows current cpu frequency by looking at appropriate files in /sys/devices
+This module shows the current CPU frequency as set by the cpufreq kernel
+module.
 
 **Requirement:**
-Processor which presents data scaling frequency data
+You need to have `CONFIG_CPU_FREQ` and (optionally) `CONFIG_CPU_FREQ_STAT`
+enabled in your kernel.
+
+This module tries to read from one of two possible locations. On
+initialization, it tries to read the `time_in_state` files provided by
+cpufreq\_stats. If this file does not exist, or doesn't contain valid data, it
+falls back to using the more inaccurate `scaling_cur_freq` file (which only
+represents the **current** CPU frequency, and doesn't account for any state
+changes which happen between updates).
 
 It produces one chart with multiple lines (one line per core).
 
@@ -142,11 +212,23 @@ Sample:
 sys_dir: "/sys/devices"
 ```
 
-If no configuration is given, module will search for `scaling_cur_freq` files in `/sys/devices` directory.
+If no configuration is given, module will search for cpufreq files in `/sys/devices` directory.
 Directory is also prefixed with `NETDATA_HOST_PREFIX` if specified.
 
 ---
 
+# cpuidle
+
+This module monitors the usage of CPU idle states.
+
+**Requirement:**
+Your kernel needs to have `CONFIG_CPU_IDLE` enabled.
+
+It produces one stacked chart per CPU, showing the percentage of time spent in
+each state.
+
+---
+
 # dovecot
 
 This module provides statistics information from dovecot server. 
@@ -158,45 +240,47 @@ Dovecot unix socket with R/W permissions for user netdata or dovecot with config
  
 Module gives information with following charts:
 
-1. **logins and sessions**
- * logins
+1. **sessions**
  * active sessions
 
-2. **commands** - number of IMAP commands 
+2. **logins**
+ * logins
+
+3. **commands** - number of IMAP commands 
  * commands
  
-3. **Faults**
+4. **Faults**
  * minor
  * major
  
-4. **Context Switches** 
+5. **Context Switches** 
  * volountary
  * involountary
  
-5. **disk** in bytes/s
+6. **disk** in bytes/s
  * read
  * write
  
-6. **bytes** in bytes/s
+7. **bytes** in bytes/s
  * read
  * write
  
-7. **number of syscalls** in syscalls/s
+8. **number of syscalls** in syscalls/s
  * read
  * write
 
-8. **lookups** - number of lookups per second
+9. **lookups** - number of lookups per second
  * path
  * attr
 
-9. **hits** - number of cache hits 
+10. **hits** - number of cache hits 
  * hits
 
-10. **attempts** - authorization attemts
+11. **attempts** - authorization attemts
  * success
  * failure
 
-11. **cache** - cached authorization hits
+12. **cache** - cached authorization hits
  * hit
  * miss
  
@@ -219,6 +303,67 @@ If no configuration is given, module will attempt to connect to dovecot using un
 
 ---
 
+# elasticsearch
+
+Module monitor elasticsearch performance and health metrics
+
+It produces:
+
+1. **Search performance** charts:
+ * Number of queries, fetches
+ * Time spent on queries, fetches
+ * Query and fetch latency
+
+2. **Indexing performance** charts:
+ * Number of documents indexed, index refreshes, flushes
+ * Time spent on indexing, refreshing, flushing
+ * Indexing and flushing latency
+
+3. **Memory usage and garbace collection** charts:
+ * JVM heap currently in use, commited
+ * Count of garbage collections
+ * Time spent on garbage collections
+
+4. **Host metrics** charts:
+ * Available file descriptors in percent 
+ * Opened HTTP connections
+ * Cluster communication transport metrics
+
+5. **Queues and rejections** charts:
+ * Number of queued/rejected threads in thread pool
+
+6. **Fielddata cache** charts:
+ * Fielddata cache size
+ * Fielddata evictions and circuit breaker tripped count
+
+7. **Cluster health API** charts:
+ * Cluster status
+ * Nodes and tasks statistics
+ * Shards statistics
+
+8. **Cluster stats API** charts:
+ * Nodes statistics
+ * Query cache statistics
+ * Docs statistics
+ * Store statistics
+ * Indices and shards statistics
+
+### configuration
+
+Sample:
+
+```yaml
+local:
+  host               :  'ipaddress'   # Server ip address or hostname
+  port               : 'password'     # Port on which elasticsearch listed
+  cluster_health     :  True/False    # Calls to cluster health elasticsearch API. Enabled by default.
+  cluster_stats      :  True/False    # Calls to cluster stats elasticsearch API. Enabled by default.
+```
+
+If no configuration is given, module will fail to run.
+
+---
+
 # exim
 
 Simple module executing `exim -bpc` to grab exim queue. 
@@ -233,6 +378,151 @@ Configuration is not needed.
 
 ---
 
+# fail2ban
+
+Module monitor fail2ban log file to show all bans for all active jails 
+
+**Requirements:**
+ * fail2ban.log file MUST BE readable by netdata (A good idea is to add  **create 0640 root netdata** to fail2ban conf at logrotate.d)
+ 
+It produces one chart with multiple lines (one line per jail)
+ 
+### configuration
+
+Sample:
+
+```yaml
+local:
+ log_path: '/var/log/fail2ban.log'
+ conf_path: '/etc/fail2ban/jail.local'
+ exclude: 'dropbear apache'
+```
+If no configuration is given, module will attempt to read log file at `/var/log/fail2ban.log` and conf file at `/etc/fail2ban/jail.local`.
+If conf file is not found default jail is `ssh`.
+
+---
+
+# freeradius
+
+Uses the `radclient` command to provide freeradius statistics. It is not recommended to run it every second.
+
+It produces:
+
+1. **Authentication counters:**
+ * access-accepts
+ * access-rejects
+ * auth-dropped-requests
+ * auth-duplicate-requests
+ * auth-invalid-requests
+ * auth-malformed-requests
+ * auth-unknown-types
+
+2. **Accounting counters:** [optional]
+ * accounting-requests
+ * accounting-responses
+ * acct-dropped-requests
+ * acct-duplicate-requests
+ * acct-invalid-requests
+ * acct-malformed-requests
+ * acct-unknown-types
+
+3. **Proxy authentication counters:** [optional]
+ * proxy-access-accepts
+ * proxy-access-rejects
+ * proxy-auth-dropped-requests
+ * proxy-auth-duplicate-requests
+ * proxy-auth-invalid-requests
+ * proxy-auth-malformed-requests
+ * proxy-auth-unknown-types
+
+4. **Proxy accounting counters:** [optional]
+ * proxy-accounting-requests
+ * proxy-accounting-responses
+ * proxy-acct-dropped-requests
+ * proxy-acct-duplicate-requests
+ * proxy-acct-invalid-requests
+ * proxy-acct-malformed-requests
+ * proxy-acct-unknown-typesa
+
+
+### configuration
+
+Sample:
+
+```yaml
+local:
+  host       : 'localhost'
+  port       : '18121'
+  secret     : 'adminsecret'
+  acct       : False # Freeradius accounting statistics.
+  proxy_auth : False # Freeradius proxy authentication statistics. 
+  proxy_acct : False # Freeradius proxy accounting statistics.
+```
+
+**Freeradius server configuration:**
+
+The configuration for the status server is automatically created in the sites-available directory.
+By default, server is enabled and can be queried from every client. 
+FreeRADIUS will only respond to status-server messages, if the status-server virtual server has been enabled.
+
+To do this, create a link from the sites-enabled directory to the status file in the sites-available directory:
+ * cd sites-enabled
+ * ln -s ../sites-available/status status
+
+and restart/reload your FREERADIUS server.
+
+---
+
+# haproxy
+
+Module monitors frontend and backend metrics such as bytes in, bytes out, sessions current, sessions in queue current.
+And health metrics such as backend servers status (server check should be used).
+
+Plugin can obtain data from url **OR** unix socket.
+
+**Requirement:**
+Socket MUST be readable AND writable by netdata user.
+
+It produces:
+
+1. **Frontend** family charts
+ * Kilobytes in/s 
+ * Kilobytes out/s
+ * Sessions current
+ * Sessions in queue current
+
+2. **Backend** family charts
+ * Kilobytes in/s 
+ * Kilobytes out/s
+ * Sessions current
+ * Sessions in queue current
+
+3. **Health** chart
+ * number of failed servers for every backend (in DOWN state)
+
+
+### configuration
+
+Sample:
+
+```yaml
+via_url:
+  user       : 'username' # ONLY IF stats auth is used
+  pass       : 'password' # # ONLY IF stats auth is used
+  url     : 'http://ip.address:port/url;csv;norefresh'
+```
+
+OR
+
+```yaml
+via_socket:
+  socket       : 'path/to/haproxy/sock'
+```
+
+If no configuration is given, module will fail to run.
+
+---
+
 # hddtemp
  
 Module monitors disk temperatures from one or more hddtemp daemons.
@@ -281,6 +571,69 @@ localhost:
 
 ---
 
+# isc_dhcpd
+
+Module monitor leases database to show all active leases for given pools.
+
+**Requirements:**
+ * dhcpd leases file MUST BE readable by netdata
+ * pools MUST BE in CIDR format
+
+It produces:
+
+1. **Pools utilization** Aggregate chart for all pools.
+ * utilization in percent
+
+2. **Total leases**
+ * leases (overall number of leases for all pools)
+ 
+3. **Active leases** for every pools
+  * leases (number of active leases in pool)
+
+  
+### configuration
+
+Sample:
+
+```yaml
+local:
+  leases_path       : '/var/lib/dhcp/dhcpd.leases'
+  pools       : '192.168.3.0/24 192.168.4.0/24 192.168.5.0/24'
+```
+
+In case of python2 you need to  install `py2-ipaddress` to make plugin work.
+The module will not work If no configuration is given.
+
+---
+
+
+# mdstat
+
+Module monitor /proc/mdstat
+
+It produces:
+
+1. **Health** Number of failed disks in every array (aggregate chart).
+ 
+2. **Disks stats** 
+ * total (number of devices array ideally would have)
+ * inuse (number of devices currently are in use)
+
+3. **Current status**
+ * resync in percent
+ * recovery in percent
+ * reshape in percent
+ * check in percent
+ 
+4. **Operation status** (if resync/recovery/reshape/check is active)
+ * finish in minutes
+ * speed in megabytes/s
+  
+### configuration
+No configuration is needed.
+
+---
+
 # memcached
 
 Memcached monitoring module. Data grabbed from [stats interface](https://github.com/memcached/memcached/wiki/Commands#stats).
@@ -515,6 +868,39 @@ When no configuration file is found, module tries to parse `/var/log/nginx/acces
 
 ---
 
+# ovpn_status_log
+
+Module monitor openvpn-status log file. 
+
+**Requirements:**
+
+ * If you are running multiple OpenVPN instances out of the same directory, MAKE SURE TO EDIT DIRECTIVES which create output files
+ so that multiple instances do not overwrite each other's output files.
+
+ * Make sure NETDATA USER CAN READ openvpn-status.log
+
+ * Update_every interval MUST MATCH interval on which OpenVPN writes operational status to log file.
+ 
+It produces:
+
+1. **Users** OpenVPN active users
+ * users
+ 
+2. **Traffic** OpenVPN overall bandwidth usage in kilobit/s
+ * in
+ * out
+ 
+### configuration
+
+Sample:
+
+```yaml
+default
+ log_path     : '/var/log/openvpn-status.log'
+```
+
+---
+
 # phpfpm
 
 This module will monitor one or more php-fpm instances depending on configuration. 
@@ -699,3 +1085,69 @@ Without configuration, module attempts to connect to `http://localhost:8080/mana
 So it will probably fail.
 
 --- 
+
+# varnish cache
+
+Module uses the `varnishstat` command to provide varnish cache statistics.
+
+It produces:
+
+1. **Client metrics**
+ * session accepted
+ * session dropped
+ * good client requests received
+
+2. **All history hit rate ratio**
+ * cache hits in percent
+ * cache miss in percent
+ * cache hits for pass percent
+
+3. **Curent poll hit rate ratio**
+ * cache hits in percent
+ * cache miss in percent
+ * cache hits for pass percent
+
+4. **Thread-related metrics** (only for varnish version 4+)
+ * total number of threads
+ * threads created
+ * threads creation failed
+ * threads hit max
+ * length os session queue
+ * sessions queued for thread
+
+5. **Backend health**
+ * backend conn. success
+ * backend conn. not attempted
+ * backend conn. too many
+ * backend conn. failures
+ * backend conn. reuses
+ * backend conn. recycles
+ * backend conn. retry
+ * backend requests made
+
+6. **Memory usage**
+ * memory available in megabytes
+ * memory allocated in megabytes
+
+7. **Problems summary**
+ * session dropped
+ * session accept failures
+ * session pipe overflow
+ * backend conn. not attempted
+ * fetch failed (all causes)
+ * backend conn. too many
+ * threads hit max
+ * threads destroyed
+ * length of session queue
+ * HTTP header overflows
+ * ESI parse errors
+ * ESI parse warnings
+
+8. **Uptime**
+ * varnish instance uptime in seconds
+
+### configuration
+
+No configuration is needed.
+
+---
diff --git a/python.d/bind_rndc.chart.py b/python.d/bind_rndc.chart.py
new file mode 100644
index 00000000..e11c751f
--- /dev/null
+++ b/python.d/bind_rndc.chart.py
@@ -0,0 +1,180 @@
+# -*- coding: utf-8 -*-
+# Description: bind rndc netdata python.d module
+# Author: l2isbad
+
+from base import SimpleService
+from re import compile, findall
+from os.path import getsize, isfile, split
+from os import access as is_accessible, R_OK
+from subprocess import Popen
+
+priority = 60000
+retries = 60
+update_every = 30
+
+DIRECTORIES = ['/bin/', '/usr/bin/', '/sbin/', '/usr/sbin/']
+NMS = ['requests', 'responses', 'success', 'auth_answer', 'nonauth_answer', 'nxrrset', 'failure',
+       'nxdomain', 'recursion', 'duplicate', 'rejections']
+QUERIES = ['RESERVED0', 'A', 'NS', 'CNAME', 'SOA', 'PTR', 'MX', 'TXT', 'X25', 'AAAA', 'SRV', 'NAPTR',
+           'A6', 'DS', 'RRSIG', 'DNSKEY', 'SPF', 'ANY', 'DLV']
+
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        self.named_stats_path = self.configuration.get('named_stats_path', '/var/log/bind/named.stats')
+        self.regex_values = compile(r'([0-9]+) ([^\n]+)')
+        # self.options = ['Incoming Requests', 'Incoming Queries', 'Outgoing Queries',
+        # 'Name Server Statistics', 'Zone Maintenance Statistics', 'Resolver Statistics',
+        # 'Cache DB RRsets', 'Socket I/O Statistics']
+        self.options = ['Name Server Statistics', 'Incoming Queries', 'Outgoing Queries']
+        self.regex_options = [r'(%s(?= \+\+)) \+\+([^\+]+)' % option for option in self.options]
+        try:
+            self.rndc = [''.join([directory, 'rndc']) for directory in DIRECTORIES
+                         if isfile(''.join([directory, 'rndc']))][0]
+        except IndexError:
+            self.rndc = False
+
+    def check(self):
+        # We cant start without 'rndc' command
+        if not self.rndc:
+            self.error('Command "rndc" not found')
+            return False
+
+        # We cant start if stats file is not exist or not readable by netdata user
+        if not is_accessible(self.named_stats_path, R_OK):
+            self.error('Cannot access file %s' % self.named_stats_path)
+            return False
+
+        size_before = getsize(self.named_stats_path)
+        run_rndc = Popen([self.rndc, 'stats'], shell=False)
+        run_rndc.wait()
+        size_after = getsize(self.named_stats_path)
+
+        # We cant start if netdata user has no permissions to run 'rndc stats'
+        if not run_rndc.returncode:
+            # 'rndc' was found, stats file is exist and readable and we can run 'rndc stats'. Lets go!
+            self.create_charts()
+            
+            # BIND APPEND dump on every run 'rndc stats'
+            # that is why stats file size can be VERY large if update_interval too small
+            dump_size_24hr = round(86400 / self.update_every * (int(size_after) - int(size_before)) / 1048576, 3)
+            
+            # If update_every too small we should WARN user
+            if self.update_every < 30:
+                self.info('Update_every %s is NOT recommended for use. Increase the value to > 30' % self.update_every)
+            
+            self.info('With current update_interval it will be + %s MB every 24hr. '
+                      'Don\'t forget to create logrotate conf file for %s' % (dump_size_24hr, self.named_stats_path))
+
+            self.info('Plugin was started successfully.')
+
+            return True
+        else:
+            self.error('Not enough permissions to run "%s stats"' % self.rndc)
+            return False
+
+    def _get_raw_data(self):
+        """
+        Run 'rndc stats' and read last dump from named.stats
+        :return: tuple(
+                       file.read() obj,
+                       named.stats file size
+                      )
+        """
+
+        try:
+            current_size = getsize(self.named_stats_path)
+        except OSError:
+            return None, None
+        
+        run_rndc = Popen([self.rndc, 'stats'], shell=False)
+        run_rndc.wait()
+
+        if run_rndc.returncode:     
+            return None, None
+
+        try:
+            with open(self.named_stats_path) as bind_rndc:
+                bind_rndc.seek(current_size)
+                result = bind_rndc.read()
+        except OSError:
+            return None, None
+        else:
+            return result, current_size
+
+    def _get_data(self):
+        """
+        Parse data from _get_raw_data()
+        :return: dict
+        """
+
+        raw_data, size = self._get_raw_data()
+
+        if raw_data is None:
+            return None
+
+        rndc_stats = dict()
+        
+        # Result: dict.
+        # topic = Cache DB RRsets; body = A 178303 NS 86790 ... ; desc = A; value = 178303
+        # {'Cache DB RRsets': [('A', 178303), ('NS', 286790), ...],
+        # {Incoming Queries': [('RESERVED0', 8), ('A', 4557317680), ...],
+        # ......
+        for regex in self.regex_options:
+            rndc_stats.update({topic: [(desc, int(value)) for value, desc in self.regex_values.findall(body)]
+                               for topic, body in findall(regex, raw_data)})
+        
+        nms = dict(rndc_stats.get('Name Server Statistics', []))
+
+        inc_queries = {'i' + k: 0 for k in QUERIES}
+        inc_queries.update({'i' + k: v for k, v in rndc_stats.get('Incoming Queries', [])})
+        out_queries = {'o' + k: 0 for k in QUERIES}
+        out_queries.update({'o' + k: v for k, v in rndc_stats.get('Outgoing Queries', [])})
+        
+        to_netdata = dict()
+        to_netdata['requests'] = sum([v for k, v in nms.items() if 'request' in k and 'received' in k])
+        to_netdata['responses'] = sum([v for k, v in nms.items() if 'responses' in k and 'sent' in k])
+        to_netdata['success'] = nms.get('queries resulted in successful answer', 0)
+        to_netdata['auth_answer'] = nms.get('queries resulted in authoritative answer', 0)
+        to_netdata['nonauth_answer'] = nms.get('queries resulted in non authoritative answer', 0)
+        to_netdata['nxrrset'] = nms.get('queries resulted in nxrrset', 0)
+        to_netdata['failure'] = sum([nms.get('queries resulted in SERVFAIL', 0), nms.get('other query failures', 0)])
+        to_netdata['nxdomain'] = nms.get('queries resulted in NXDOMAIN', 0)
+        to_netdata['recursion'] = nms.get('queries caused recursion', 0)
+        to_netdata['duplicate'] = nms.get('duplicate queries received', 0)
+        to_netdata['rejections'] = nms.get('recursive queries rejected', 0)
+        to_netdata['stats_size'] = size
+        
+        to_netdata.update(inc_queries)
+        to_netdata.update(out_queries)
+        return to_netdata
+
+    def create_charts(self):
+        self.order = ['stats_size', 'bind_stats', 'incoming_q', 'outgoing_q']
+        self.definitions = {
+            'bind_stats': {
+                'options': [None, 'Name Server Statistics', 'stats', 'Name Server Statistics', 'bind_rndc.stats', 'line'],
+                'lines': [
+                         ]},
+            'incoming_q': {
+                'options': [None, 'Incoming queries', 'queries','Incoming queries', 'bind_rndc.incq', 'line'],
+                'lines': [
+                        ]},
+            'outgoing_q': {
+                'options': [None, 'Outgoing queries', 'queries','Outgoing queries', 'bind_rndc.outq', 'line'],
+                'lines': [
+                        ]},
+            'stats_size': {
+                'options': [None, '%s file size' % split(self.named_stats_path)[1].capitalize(), 'megabytes',
+                            '%s size' % split(self.named_stats_path)[1].capitalize(), 'bind_rndc.size', 'line'],
+                'lines': [
+                         ["stats_size", None, "absolute", 1, 1048576]
+                        ]}
+                     }
+        for elem in QUERIES:
+            self.definitions['incoming_q']['lines'].append(['i' + elem, elem, 'incremental'])
+            self.definitions['outgoing_q']['lines'].append(['o' + elem, elem, 'incremental'])
+
+        for elem in NMS:
+            self.definitions['bind_stats']['lines'].append([elem, None, 'incremental'])
diff --git a/python.d/cpufreq.chart.py b/python.d/cpufreq.chart.py
index a9de5ced..c761aae8 100644
--- a/python.d/cpufreq.chart.py
+++ b/python.d/cpufreq.chart.py
@@ -1,8 +1,10 @@
 # -*- coding: utf-8 -*-
 # Description: cpufreq netdata python.d module
-# Author: Pawel Krupa (paulfantom)
+# Author: Pawel Krupa (paulfantom) and Steven Noonan (tycho)
 
+import glob
 import os
+import time
 from base import SimpleService
 
 # default module values (can be overridden per job in `config`)
@@ -18,29 +20,53 @@ CHARTS = {
         ]}
 }
 
-
 class Service(SimpleService):
     def __init__(self, configuration=None, name=None):
         prefix = os.getenv('NETDATA_HOST_PREFIX', "")
         if prefix.endswith('/'):
             prefix = prefix[:-1]
         self.sys_dir = prefix + "/sys/devices"
-        self.filename = "scaling_cur_freq"
         SimpleService.__init__(self, configuration=configuration, name=name)
         self.order = ORDER
         self.definitions = CHARTS
         self._orig_name = ""
         self.assignment = {}
-        self.paths = []
+        self.accurate_exists = True
+        self.accurate_last = {}
 
     def _get_data(self):
-        raw = {}
-        for path in self.paths:
-            with open(path, 'r') as f:
-                raw[path] = f.read()
         data = {}
-        for path in self.paths:
-            data[self.assignment[path]] = raw[path]
+
+        if self.accurate_exists:
+            elapsed = time.time() - self.timetable['last']
+
+            accurate_ok = True
+
+            for name, paths in self.assignment.items():
+                last = self.accurate_last[name]
+                current = 0
+                for line in open(paths['accurate'], 'r'):
+                    line = list(map(int, line.split()))
+                    current += (line[0] * line[1]) / 100
+                delta = current - last
+                data[name] = delta
+                self.accurate_last[name] = current
+                if delta == 0 or abs(delta) > 1e7:
+                    # Delta is either too large or nonexistent, fall back to
+                    # less accurate reading. This can happen if we switch
+                    # to/from the 'schedutil' governor, which doesn't report
+                    # stats.
+                    accurate_ok = False
+
+            if accurate_ok:
+                return data
+            else:
+                self.alert("accurate method failed, falling back")
+
+
+        for name, paths in self.assignment.items():
+            data[name] = open(paths['inaccurate'], 'r').read()
+
         return data
 
     def check(self):
@@ -51,23 +77,30 @@ class Service(SimpleService):
 
         self._orig_name = self.chart_name
 
-        for dirpath, _, filenames in os.walk(self.sys_dir):
-            if self.filename in filenames:
-                self.paths.append(dirpath + "/" + self.filename)
-
-        if len(self.paths) == 0:
-            self.error("cannot find", self.filename)
+        for path in glob.glob(self.sys_dir + '/system/cpu/cpu*/cpufreq/stats/time_in_state'):
+            path_elem = path.split('/')
+            cpu = path_elem[-4]
+            if cpu not in self.assignment:
+                self.assignment[cpu] = {}
+            self.assignment[cpu]['accurate'] = path
+            self.accurate_last[cpu] = 0
+
+        if len(self.assignment) == 0:
+            self.accurate_exists = False
+
+        for path in glob.glob(self.sys_dir + '/system/cpu/cpu*/cpufreq/scaling_cur_freq'):
+            path_elem = path.split('/')
+            cpu = path_elem[-3]
+            if cpu not in self.assignment:
+                self.assignment[cpu] = {}
+            self.assignment[cpu]['inaccurate'] = path
+
+        if len(self.assignment) == 0:
+            self.error("couldn't find a method to read cpufreq statistics")
             return False
 
-        self.paths.sort()
-        i = 0
-        for path in self.paths:
-            self.assignment[path] = "cpu" + str(i)
-            i += 1
-
-        for name in self.assignment:
-            dim = self.assignment[name]
-            self.definitions[ORDER[0]]['lines'].append([dim, dim, 'absolute', 1, 1000])
+        for name in self.assignment.keys():
+            self.definitions[ORDER[0]]['lines'].append([name, name, 'absolute', 1, 1000])
 
         return True
 
diff --git a/python.d/cpuidle.chart.py b/python.d/cpuidle.chart.py
new file mode 100644
index 00000000..f7199aeb
--- /dev/null
+++ b/python.d/cpuidle.chart.py
@@ -0,0 +1,143 @@
+# -*- coding: utf-8 -*-
+# Description: cpuidle netdata python.d module
+# Author: Steven Noonan (tycho)
+
+import glob
+import os
+import platform
+import time
+from base import SimpleService
+
+import ctypes
+syscall = ctypes.CDLL('libc.so.6').syscall
+
+# default module values (can be overridden per job in `config`)
+# update_every = 2
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        prefix = os.getenv('NETDATA_HOST_PREFIX', "")
+        if prefix.endswith('/'):
+            prefix = prefix[:-1]
+        self.sys_dir = prefix + "/sys/devices/system/cpu"
+        self.schedstat_path = prefix + "/proc/schedstat"
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        self.order = []
+        self.definitions = {}
+        self._orig_name = ""
+        self.assignment = {}
+
+    def __gettid(self):
+        # This is horrendous. We need the *thread id* (not the *process id*),
+        # but there's no Python standard library way of doing that. If you need
+        # to enable this module on a non-x86 machine type, you'll have to find
+        # the Linux syscall number for gettid() and add it to the dictionary
+        # below.
+        syscalls = {
+            'i386':    224,
+            'x86_64':  186,
+        }
+        if platform.machine() not in syscalls:
+            return None
+        tid = syscall(syscalls[platform.machine()])
+        return tid
+
+    def __wake_cpus(self):
+        # Requires Python 3.3+. This will "tickle" each CPU to force it to
+        # update its idle counters.
+        if hasattr(os, 'sched_setaffinity'):
+            pid = self.__gettid()
+            save_affinity = os.sched_getaffinity(pid)
+            for idx in range(0, len(self.assignment)):
+                os.sched_setaffinity(pid, [idx])
+                os.sched_getaffinity(pid)
+            os.sched_setaffinity(pid, save_affinity)
+
+    def __read_schedstat(self):
+        cpus = {}
+        for line in open(self.schedstat_path, 'r'):
+            if not line.startswith('cpu'):
+                continue
+            line = line.rstrip().split()
+            cpu = line[0]
+            active_time = line[7]
+            cpus[cpu] = int(active_time) // 1000
+        return cpus
+
+    def _get_data(self):
+        results = {}
+
+        # This line is critical for the stats to update. If we don't "tickle"
+        # all the CPUs, then all the counters stop counting.
+        self.__wake_cpus()
+
+        # Use the kernel scheduler stats to determine how much time was spent
+        # in C0 (active).
+        schedstat = self.__read_schedstat()
+
+        for cpu, metrics in self.assignment.items():
+            update_time = schedstat[cpu]
+            results[cpu + '_active_time'] = update_time
+
+            for metric, path in metrics.items():
+                residency = int(open(path, 'r').read())
+                results[metric] = residency
+
+        return results
+
+    def check(self):
+        if self.__gettid() is None:
+            self.error("Cannot get thread ID. Stats would be completely broken.")
+            return False
+
+        self._orig_name = self.chart_name
+
+        for path in sorted(glob.glob(self.sys_dir + '/cpu*/cpuidle/state*/name')):
+            # ['', 'sys', 'devices', 'system', 'cpu', 'cpu0', 'cpuidle', 'state3', 'name']
+            path_elem = path.split('/')
+            cpu = path_elem[-4]
+            state = path_elem[-2]
+            statename = open(path, 'rt').read().rstrip()
+
+            orderid = '%s_cpuidle' % (cpu,)
+            if orderid not in self.definitions:
+                self.order.append(orderid)
+                active_name = '%s_active_time' % (cpu,)
+                self.definitions[orderid] = {
+                    'options': [None, 'C-state residency', 'time%', 'cpuidle', None, 'stacked'],
+                    'lines': [
+                        [active_name, 'C0 (active)', 'percentage-of-incremental-row', 1, 1],
+                    ],
+                }
+                self.assignment[cpu] = {}
+
+            defid = '%s_%s_time' % (orderid, state)
+
+            self.definitions[orderid]['lines'].append(
+                [defid, statename, 'percentage-of-incremental-row', 1, 1]
+            )
+
+            self.assignment[cpu][defid] = '/'.join(path_elem[:-1] + ['time'])
+
+        # Sort order by kernel-specified CPU index
+        self.order.sort(key=lambda x: int(x.split('_')[0][3:]))
+
+        if len(self.definitions) == 0:
+            self.error("couldn't find cstate stats")
+            return False
+
+        return True
+
+    def create(self):
+        self.chart_name = "cpu"
+        status = SimpleService.create(self)
+        self.chart_name = self._orig_name
+        return status
+
+    def update(self, interval):
+        self.chart_name = "cpu"
+        status = SimpleService.update(self, interval=interval)
+        self.chart_name = self._orig_name
+        return status
+
+# vim: set ts=4 sts=4 sw=4 et:
diff --git a/python.d/dovecot.chart.py b/python.d/dovecot.chart.py
index 586478cd..60e8bf6e 100644
--- a/python.d/dovecot.chart.py
+++ b/python.d/dovecot.chart.py
@@ -10,74 +10,78 @@ priority = 60000
 retries = 60
 
 # charts order (can be overridden if you want less charts, or different order)
-ORDER = ['sessions', 'commands',
+ORDER = ['sessions', 'logins', 'commands',
          'faults',
          'context_switches',
-         'disk', 'bytes', 'syscalls',
+         'io', 'net', 'syscalls',
          'lookup', 'cache',
          'auth', 'auth_cache']
 
 CHARTS = {
     'sessions': {
-        'options': [None, "logins and sessions", 'number', 'IMAP', 'dovecot.sessions', 'line'],
+        'options': [None, "Dovecot Active Sessions", 'number', 'sessions', 'dovecot.sessions', 'line'],
         'lines': [
-            ['num_logins', 'logins', 'absolute'],
             ['num_connected_sessions', 'active sessions', 'absolute']
         ]},
+    'logins': {
+        'options': [None, "Dovecot Logins", 'number', 'logins', 'dovecot.logins', 'line'],
+        'lines': [
+            ['num_logins', 'logins', 'absolute']
+        ]},
     'commands': {
-        'options': [None, "commands", "commands", 'IMAP', 'dovecot.commands', 'line'],
+        'options': [None, "Dovecot Commands", "commands", 'commands', 'dovecot.commands', 'line'],
         'lines': [
             ['num_cmds', 'commands', 'absolute']
         ]},
     'faults': {
-        'options': [None, "faults", "faults", 'Faults', 'dovecot.faults', 'line'],
+        'options': [None, "Dovecot Page Faults", "faults", 'page faults', 'dovecot.faults', 'line'],
         'lines': [
             ['min_faults', 'minor', 'absolute'],
             ['maj_faults', 'major', 'absolute']
         ]},
     'context_switches': {
-        'options': [None, "context switches", '', 'Context Switches', 'dovecot.context_switches', 'line'],
+        'options': [None, "Dovecot Context Switches", '', 'context switches', 'dovecot.context_switches', 'line'],
         'lines': [
             ['vol_cs', 'volountary', 'absolute'],
             ['invol_cs', 'involountary', 'absolute']
         ]},
-    'disk': {
-        'options': [None, "disk", 'bytes/s', 'Reads and Writes', 'dovecot.disk', 'line'],
+    'io': {
+        'options': [None, "Dovecot Disk I/O", 'kilobytes/s', 'disk', 'dovecot.io', 'area'],
         'lines': [
-            ['disk_input', 'read', 'incremental'],
-            ['disk_output', 'write', 'incremental']
+            ['disk_input', 'read', 'incremental', 1, 1024],
+            ['disk_output', 'write', 'incremental', -1, 1024]
         ]},
-    'bytes': {
-        'options': [None, "bytes", 'bytes/s', 'Reads and Writes', 'dovecot.bytes', 'line'],
+    'net': {
+        'options': [None, "Dovecot Network Bandwidth", 'kilobits/s', 'network', 'dovecot.net', 'area'],
         'lines': [
-            ['read_bytes', 'read', 'incremental'],
-            ['write_bytes', 'write', 'incremental']
+            ['read_bytes', 'read', 'incremental', 8, 1024],
+            ['write_bytes', 'write', 'incremental', -8, 1024]
         ]},
     'syscalls': {
-        'options': [None, "number of syscalls", 'syscalls/s', 'Reads and Writes', 'dovecot.syscalls', 'line'],
+        'options': [None, "Dovecot Number of SysCalls", 'syscalls/s', 'system', 'dovecot.syscalls', 'line'],
         'lines': [
             ['read_count', 'read', 'incremental'],
             ['write_count', 'write', 'incremental']
         ]},
     'lookup': {
-        'options': [None, "lookups", 'number/s', 'Mail', 'dovecot.lookup', 'line'],
+        'options': [None, "Dovecot Lookups", 'number/s', 'lookups', 'dovecot.lookup', 'stacked'],
         'lines': [
             ['mail_lookup_path', 'path', 'incremental'],
             ['mail_lookup_attr', 'attr', 'incremental']
         ]},
     'cache': {
-        'options': [None, "hits", 'hits/s', 'Mail', 'dovecot.cache', 'line'],
+        'options': [None, "Dovecot Cache Hits", 'hits/s', 'cache', 'dovecot.cache', 'line'],
         'lines': [
             ['mail_cache_hits', 'hits', 'incremental']
         ]},
     'auth': {
-        'options': [None, "attempts", 'attempts', 'Authentication', 'dovecot.auth', 'stacked'],
+        'options': [None, "Dovecot Authentications", 'attempts', 'logins', 'dovecot.auth', 'stacked'],
         'lines': [
-            ['auth_successes', 'success', 'absolute'],
-            ['auth_failures', 'failure', 'absolute']
+            ['auth_successes', 'ok', 'absolute'],
+            ['auth_failures', 'failed', 'absolute']
         ]},
     'auth_cache': {
-        'options': [None, "cache", 'number', 'Authentication', 'dovecot.auth_cache', 'stacked'],
+        'options': [None, "Dovecot Authentication Cache", 'number', 'cache', 'dovecot.auth_cache', 'stacked'],
         'lines': [
             ['auth_cache_hits', 'hit', 'absolute'],
             ['auth_cache_misses', 'miss', 'absolute']
@@ -106,6 +110,10 @@ class Service(SocketService):
         except (ValueError, AttributeError):
             return None
 
+        if raw is None:
+            self.debug("dovecot returned no data")
+            return None
+
         data = raw.split('\n')[:2]
         desc = data[0].split('\t')
         vals = data[1].split('\t')
diff --git a/python.d/elasticsearch.chart.py b/python.d/elasticsearch.chart.py
new file mode 100644
index 00000000..ff841f17
--- /dev/null
+++ b/python.d/elasticsearch.chart.py
@@ -0,0 +1,402 @@
+# -*- coding: utf-8 -*-
+# Description: elastic search node stats netdata python.d module
+# Author: l2isbad
+
+from base import UrlService
+from requests import get
+from socket import gethostbyname
+try:
+        from queue import Queue
+except ImportError:
+        from Queue import Queue
+from threading import Thread
+
+# default module values (can be overridden per job in `config`)
+# update_every = 2
+update_every = 5
+priority = 60000
+retries = 60
+
+# charts order (can be overridden if you want less charts, or different order)
+ORDER = ['search_perf_total', 'search_perf_time', 'search_latency', 'index_perf_total', 'index_perf_time',
+         'index_latency', 'jvm_mem_heap', 'jvm_gc_count', 'jvm_gc_time', 'host_metrics_file_descriptors',
+         'host_metrics_http', 'host_metrics_transport', 'thread_pool_qr', 'fdata_cache', 'fdata_ev_tr',
+         'cluster_health_status', 'cluster_health_nodes', 'cluster_health_shards', 'cluster_stats_nodes',
+         'cluster_stats_query_cache', 'cluster_stats_docs', 'cluster_stats_store', 'cluster_stats_indices_shards']
+
+CHARTS = {
+    'search_perf_total': {
+        'options': [None, 'Number of queries, fetches', 'queries', 'Search performance', 'es.search_query', 'stacked'],
+        'lines': [
+            ['query_total', 'search_total', 'incremental'],
+            ['fetch_total', 'fetch_total', 'incremental'],
+            ['query_current', 'search_current', 'absolute'],
+            ['fetch_current', 'fetch_current', 'absolute']
+        ]},
+    'search_perf_time': {
+        'options': [None, 'Time spent on queries, fetches', 'seconds', 'Search performance', 'es.search_time', 'stacked'],
+        'lines': [
+            ['query_time_in_millis', 'query', 'incremental', 1, 1000],
+            ['fetch_time_in_millis', 'fetch', 'incremental', 1, 1000]
+        ]},
+    'search_latency': {
+        'options': [None, 'Query and fetch latency', 'ms', 'Search performance', 'es.search_latency', 'stacked'],
+        'lines': [
+            ['query_latency', 'query', 'absolute', 1, 1000],
+            ['fetch_latency', 'fetch', 'absolute', 1, 1000]
+        ]},
+    'index_perf_total': {
+        'options': [None, 'Number of documents indexed, index refreshes, flushes', 'documents/indexes',
+                    'Indexing performance', 'es.index_doc', 'stacked'],
+        'lines': [
+            ['indexing_index_total', 'indexed', 'incremental'],
+            ['refresh_total', 'refreshes', 'incremental'],
+            ['flush_total', 'flushes', 'incremental'],
+            ['indexing_index_current', 'indexed_current', 'absolute'],
+        ]},
+    'index_perf_time': {
+        'options': [None, 'Time spent on indexing, refreshing, flushing', 'seconds', 'Indexing performance',
+                    'es.search_time', 'stacked'],
+        'lines': [
+            ['indexing_index_time_in_millis', 'indexing', 'incremental', 1, 1000],
+            ['refresh_total_time_in_millis', 'refreshing', 'incremental', 1, 1000],
+            ['flush_total_time_in_millis', 'flushing', 'incremental', 1, 1000]
+        ]},
+    'index_latency': {
+        'options': [None, 'Indexing and flushing latency', 'ms', 'Indexing performance',
+                    'es.index_latency', 'stacked'],
+        'lines': [
+            ['indexing_latency', 'indexing', 'absolute', 1, 1000],
+            ['flushing_latency', 'flushing', 'absolute', 1, 1000]
+        ]},
+    'jvm_mem_heap': {
+        'options': [None, 'JVM heap currently in use/committed', 'percent/MB', 'Memory usage and gc',
+                    'es.jvm_heap', 'area'],
+        'lines': [
+            ['jvm_heap_percent', 'inuse', 'absolute'],
+            ['jvm_heap_commit', 'commit', 'absolute', -1, 1048576]
+        ]},
+    'jvm_gc_count': {
+        'options': [None, 'Count of garbage collections', 'counts', 'Memory usage and gc', 'es.gc_count', 'stacked'],
+        'lines': [
+            ['young_collection_count', 'young', 'incremental'],
+            ['old_collection_count', 'old', 'incremental']
+        ]},
+    'jvm_gc_time': {
+        'options': [None, 'Time spent on garbage collections', 'ms', 'Memory usage and gc', 'es.gc_time', 'stacked'],
+        'lines': [
+            ['young_collection_time_in_millis', 'young', 'incremental'],
+            ['old_collection_time_in_millis', 'old', 'incremental']
+        ]},
+    'thread_pool_qr': {
+        'options': [None, 'Number of queued/rejected threads in thread pool', 'threads', 'Queues and rejections',
+                    'es.qr', 'stacked'],
+        'lines': [
+            ['bulk_queue', 'bulk_queue', 'absolute'],
+            ['index_queue', 'index_queue', 'absolute'],
+            ['search_queue', 'search_queue', 'absolute'],
+            ['merge_queue', 'merge_queue', 'absolute'],
+            ['bulk_rejected', 'bulk_rej', 'absolute'],
+            ['index_rejected', 'index_rej', 'absolute'],
+            ['search_rejected', 'search_rej', 'absolute'],
+            ['merge_rejected', 'merge_rej', 'absolute']
+        ]},
+    'fdata_cache': {
+        'options': [None, 'Fielddata cache size', 'MB', 'Fielddata cache', 'es.fdata_cache', 'line'],
+        'lines': [
+            ['index_fdata_mem', 'mem_size', 'absolute', 1, 1048576]
+        ]},
+    'fdata_ev_tr': {
+        'options': [None, 'Fielddata evictions and circuit breaker tripped count', 'number of events',
+                    'Fielddata cache', 'es.fdata_ev_tr', 'line'],
+        'lines': [
+            ['index_fdata_evic', 'evictions', 'incremental'],
+            ['breakers_fdata_trip', 'tripped', 'incremental']
+        ]},
+    'cluster_health_nodes': {
+        'options': [None, 'Nodes and tasks statistics', 'units', 'Cluster health API',
+                    'es.cluster_health', 'stacked'],
+        'lines': [
+            ['health_number_of_nodes', 'nodes', 'absolute'],
+            ['health_number_of_data_nodes', 'data_nodes', 'absolute'],
+            ['health_number_of_pending_tasks', 'pending_tasks', 'absolute'],
+            ['health_number_of_in_flight_fetch', 'inflight_fetch', 'absolute']
+        ]},
+    'cluster_health_status': {
+        'options': [None, 'Cluster status', 'status', 'Cluster health API',
+                    'es.cluster_health_status', 'area'],
+        'lines': [
+            ['status_green', 'green', 'absolute'],
+            ['status_red', 'red', 'absolute'],
+            ['status_foo1', None, 'absolute'],
+            ['status_foo2', None, 'absolute'],
+            ['status_foo3', None, 'absolute'],
+            ['status_yellow', 'yellow', 'absolute']
+        ]},
+    'cluster_health_shards': {
+        'options': [None, 'Shards statistics', 'shards', 'Cluster health API',
+                    'es.cluster_health_sharts', 'stacked'],
+        'lines': [
+            ['health_active_shards', 'active_shards', 'absolute'],
+            ['health_relocating_shards', 'relocating_shards', 'absolute'],
+            ['health_unassigned_shards', 'unassigned', 'absolute'],
+            ['health_delayed_unassigned_shards', 'delayed_unassigned', 'absolute'],
+            ['health_initializing_shards', 'initializing', 'absolute'],
+            ['health_active_shards_percent_as_number', 'active_percent', 'absolute']
+        ]},
+    'cluster_stats_nodes': {
+        'options': [None, 'Nodes statistics', 'nodes', 'Cluster stats API',
+                    'es.cluster_stats_nodes', 'stacked'],
+        'lines': [
+            ['count_data_only', 'data_only', 'absolute'],
+            ['count_master_data', 'master_data', 'absolute'],
+            ['count_total', 'total', 'absolute'],
+            ['count_master_only', 'master_only', 'absolute'],
+            ['count_client', 'client', 'absolute']
+        ]},
+    'cluster_stats_query_cache': {
+        'options': [None, 'Query cache statistics', 'queries', 'Cluster stats API',
+                    'es.cluster_stats_query_cache', 'stacked'],
+        'lines': [
+            ['query_cache_hit_count', 'hit', 'incremental'],
+            ['query_cache_miss_count', 'miss', 'incremental']
+        ]},
+    'cluster_stats_docs': {
+        'options': [None, 'Docs statistics', 'count', 'Cluster stats API',
+                    'es.cluster_stats_docs', 'line'],
+        'lines': [
+            ['docs_count', 'docs', 'absolute']
+        ]},
+    'cluster_stats_store': {
+        'options': [None, 'Store statistics', 'MB', 'Cluster stats API',
+                    'es.cluster_stats_store', 'line'],
+        'lines': [
+            ['store_size_in_bytes', 'size', 'absolute', 1, 1048567]
+        ]},
+    'cluster_stats_indices_shards': {
+        'options': [None, 'Indices and shards statistics', 'count', 'Cluster stats API',
+                    'es.cluster_stats_ind_sha', 'stacked'],
+        'lines': [
+            ['indices_count', 'indices', 'absolute'],
+            ['shards_total', 'shards', 'absolute']
+        ]},
+    'host_metrics_transport': {
+        'options': [None, 'Cluster communication transport metrics', 'kbit/s', 'Host metrics',
+                    'es.host_metrics_transport', 'area'],
+        'lines': [
+            ['transport_rx_size_in_bytes', 'in', 'incremental', 8, 1000],
+            ['transport_tx_size_in_bytes', 'out', 'incremental', -8, 1000]
+        ]},
+    'host_metrics_file_descriptors': {
+        'options': [None, 'Available file descriptors in percent', 'percent', 'Host metrics',
+                    'es.host_metrics_descriptors', 'area'],
+        'lines': [
+            ['file_descriptors_used', 'used', 'absolute', 1, 10]
+        ]},
+    'host_metrics_http': {
+        'options': [None, 'Opened HTTP connections', 'connections', 'Host metrics',
+                    'es.host_metrics_http', 'line'],
+        'lines': [
+            ['http_current_open', 'opened', 'absolute', 1, 1]
+        ]}
+}
+
+
+class Service(UrlService):
+    def __init__(self, configuration=None, name=None):
+        UrlService.__init__(self, configuration=configuration, name=name)
+        self.order = ORDER
+        self.definitions = CHARTS
+        self.host = self.configuration.get('host')
+        self.port = self.configuration.get('port')
+        self.user = self.configuration.get('user')
+        self.password = self.configuration.get('pass')
+        self.latency = dict()
+
+    def check(self):
+        # We can't start if <host> AND <port> not specified
+        if not all([self.host, self.port]):
+            return False
+
+        # It as a bad idea to use hostname.
+        # Hostname -> ipaddress
+        try:
+            self.host = gethostbyname(self.host)
+        except Exception as e:
+            self.error(str(e))
+            return False
+
+        # HTTP Auth? NOT TESTED
+        self.auth = self.user and self.password
+
+        # Create URL for every Elasticsearch API
+        url_node_stats = 'http://%s:%s/_nodes/_local/stats' % (self.host, self.port)
+        url_cluster_health = 'http://%s:%s/_cluster/health' % (self.host, self.port)
+        url_cluster_stats = 'http://%s:%s/_cluster/stats' % (self.host, self.port)
+
+        # Create list of enabled API calls
+        user_choice = [bool(self.configuration.get('node_stats', True)),
+                       bool(self.configuration.get('cluster_health', True)),
+                       bool(self.configuration.get('cluster_stats', True))]
+        
+        avail_methods = [(self._get_node_stats, url_node_stats), 
+                        (self._get_cluster_health, url_cluster_health),
+                        (self._get_cluster_stats, url_cluster_stats)]
+
+        # Remove disabled API calls from 'avail methods'
+        self.methods = [avail_methods[_] for _ in range(len(avail_methods)) if user_choice[_]]
+
+        # Run _get_data for ALL active API calls. 
+        api_result = {}
+        for method in self.methods:
+            api_result[method[1]] = (bool(self._get_raw_data(method[1])))
+
+        # We can start ONLY if all active API calls returned NOT None
+        if not all(api_result.values()):
+            self.error('Plugin could not get data from all APIs')
+            self.error('%s' % api_result)
+            return False
+        else:
+            self.info('%s' % api_result)
+            self.info('Plugin was started successfully')
+
+            return True
+
+    def _get_raw_data(self, url):
+        try:
+            if not self.auth:
+                raw_data = get(url)
+            else:
+                raw_data = get(url, auth=(self.user, self.password))
+        except Exception:
+            return None
+
+        return raw_data
+
+    def _get_data(self):
+        threads = list()
+        queue = Queue()
+        result = dict()
+
+        for method in self.methods:
+            th = Thread(target=method[0], args=(queue, method[1]))
+            th.start()
+            threads.append(th)
+
+        for thread in threads:
+            thread.join()
+            result.update(queue.get())
+
+        return result or None
+
+    def _get_cluster_health(self, queue, url):
+        """
+        Format data received from http request
+        :return: dict
+        """
+
+        data = self._get_raw_data(url)
+
+        if not data:
+            queue.put({})
+        else:
+            data = data.json()
+
+            to_netdata = dict()
+            to_netdata.update(update_key('health', data))
+            to_netdata.update({'status_green': 0, 'status_red': 0, 'status_yellow': 0,
+                               'status_foo1': 0, 'status_foo2': 0, 'status_foo3': 0})
+            to_netdata[''.join(['status_', to_netdata.get('health_status', '')])] = 1
+
+            queue.put(to_netdata)
+
+    def _get_cluster_stats(self, queue, url):
+        """
+        Format data received from http request
+        :return: dict
+        """
+
+        data = self._get_raw_data(url)
+
+        if not data:
+            queue.put({})
+        else:
+            data = data.json()
+
+            to_netdata = dict()
+            to_netdata.update(update_key('count', data['nodes']['count']))
+            to_netdata.update(update_key('query_cache', data['indices']['query_cache']))
+            to_netdata.update(update_key('docs', data['indices']['docs']))
+            to_netdata.update(update_key('store', data['indices']['store']))
+            to_netdata['indices_count'] = data['indices']['count']
+            to_netdata['shards_total'] = data['indices']['shards']['total']
+
+            queue.put(to_netdata)
+
+    def _get_node_stats(self, queue, url):
+        """
+        Format data received from http request
+        :return: dict
+        """
+
+        data = self._get_raw_data(url)
+
+        if not data:
+            queue.put({})
+        else:
+            data = data.json()
+            node = list(data['nodes'].keys())[0]
+            to_netdata = dict()
+            # Search performance metrics
+            to_netdata.update(data['nodes'][node]['indices']['search'])
+            to_netdata['query_latency'] = self.find_avg(to_netdata['query_total'],
+                                               to_netdata['query_time_in_millis'], 'query_latency')
+            to_netdata['fetch_latency'] = self.find_avg(to_netdata['fetch_total'],
+                                               to_netdata['fetch_time_in_millis'], 'fetch_latency')
+
+            # Indexing performance metrics
+            for key in ['indexing', 'refresh', 'flush']:
+                to_netdata.update(update_key(key, data['nodes'][node]['indices'].get(key, {})))
+            to_netdata['indexing_latency'] = self.find_avg(to_netdata['indexing_index_total'],
+                                               to_netdata['indexing_index_time_in_millis'], 'index_latency')
+            to_netdata['flushing_latency'] = self.find_avg(to_netdata['flush_total'],
+                                               to_netdata['flush_total_time_in_millis'], 'flush_latency')
+            # Memory usage and garbage collection
+            to_netdata.update(update_key('young', data['nodes'][node]['jvm']['gc']['collectors']['young']))
+            to_netdata.update(update_key('old', data['nodes'][node]['jvm']['gc']['collectors']['old']))
+            to_netdata['jvm_heap_percent'] = data['nodes'][node]['jvm']['mem']['heap_used_percent']
+            to_netdata['jvm_heap_commit'] = data['nodes'][node]['jvm']['mem']['heap_committed_in_bytes']
+
+            # Thread pool queues and rejections
+            for key in ['bulk', 'index', 'search', 'merge']:
+                to_netdata.update(update_key(key, data['nodes'][node]['thread_pool'].get(key, {})))
+
+            # Fielddata cache
+            to_netdata['index_fdata_mem'] = data['nodes'][node]['indices']['fielddata']['memory_size_in_bytes']
+            to_netdata['index_fdata_evic'] = data['nodes'][node]['indices']['fielddata']['evictions']
+            to_netdata['breakers_fdata_trip'] = data['nodes'][node]['breakers']['fielddata']['tripped']
+
+            # Host metrics
+            to_netdata.update(update_key('http', data['nodes'][node]['http']))
+            to_netdata.update(update_key('transport', data['nodes'][node]['transport']))
+            to_netdata['file_descriptors_used'] = round(float(data['nodes'][node]['process']['open_file_descriptors'])
+                                                        / data['nodes'][node]['process']['max_file_descriptors'] * 1000)
+            
+            queue.put(to_netdata)
+
+    def find_avg(self, value1, value2, key):
+        if key not in self.latency:
+            self.latency.update({key: [value1, value2]})
+            return 0
+        else:
+            if not self.latency[key][0] == value1:
+                latency = round(float(value2 - self.latency[key][1]) / float(value1 - self.latency[key][0]) * 1000)
+                self.latency.update({key: [value1, value2]})
+                return latency
+            else:
+                self.latency.update({key: [value1, value2]})
+                return 0
+
+
+def update_key(string, dictionary):
+    return {'_'.join([string, k]): v for k, v in dictionary.items()}
diff --git a/python.d/fail2ban.chart.py b/python.d/fail2ban.chart.py
new file mode 100644
index 00000000..2d80282c
--- /dev/null
+++ b/python.d/fail2ban.chart.py
@@ -0,0 +1,91 @@
+# -*- coding: utf-8 -*-
+# Description: fail2ban log netdata python.d module
+# Author: l2isbad
+
+from base import LogService
+from re import compile
+try:
+    from itertools import filterfalse
+except ImportError:
+    from itertools import ifilterfalse as filterfalse
+from os import access as is_accessible, R_OK
+
+priority = 60000
+retries = 60
+regex = compile(r'([A-Za-z-]+\]) enabled = ([a-z]+)')
+
+ORDER = ['jails_group']
+
+
+class Service(LogService):
+    def __init__(self, configuration=None, name=None):
+        LogService.__init__(self, configuration=configuration, name=name)
+        self.order = ORDER
+        self.log_path = self.configuration.get('log_path', '/var/log/fail2ban.log')
+        self.conf_path = self.configuration.get('conf_path', '/etc/fail2ban/jail.local')
+        self.default_jails = ['ssh']
+        try:
+            self.exclude = self.configuration['exclude'].split()
+        except (KeyError, AttributeError):
+            self.exclude = []
+        
+
+    def _get_data(self):
+        """
+        Parse new log lines
+        :return: dict
+        """
+
+        # If _get_raw_data returns empty list (no new lines in log file) we will send to Netdata this
+        self.data = {jail: 0 for jail in self.jails_list}
+        
+        try:
+            raw = self._get_raw_data()
+            if raw is None:
+                return None
+            elif not raw:
+                return self.data
+        except (ValueError, AttributeError):
+            return None
+
+        # Fail2ban logs looks like
+        # 2016-12-25 12:36:04,711 fail2ban.actions[2455]: WARNING [ssh] Ban 178.156.32.231
+        self.data = dict(
+            zip(
+                self.jails_list,
+                [len(list(filterfalse(lambda line: (jail + '] Ban') not in line, raw))) for jail in self.jails_list]
+            ))
+
+        return self.data
+
+    def check(self):
+            
+        # Check "log_path" is accessible.
+        # If NOT STOP plugin
+        if not is_accessible(self.log_path, R_OK):
+            self.error('Cannot access file %s' % (self.log_path))
+            return False
+
+        # Check "conf_path" is accessible.
+        # If "conf_path" is accesible try to parse it to find enabled jails
+        if is_accessible(self.conf_path, R_OK):
+            with open(self.conf_path, 'rt') as jails_conf:
+                jails_list = regex.findall(' '.join(jails_conf.read().split()))
+            self.jails_list = [jail[:-1] for jail, status in jails_list if status == 'true']
+        else:
+            self.jails_list = []
+            self.error('Cannot access jail.local file %s.' % (self.conf_path))
+        
+        # If for some reason parse failed we still can START with default jails_list.
+        self.jails_list = [jail for jail in self.jails_list if jail not in self.exclude]\
+                                              if self.jails_list else self.default_jails
+        self.create_dimensions()
+        self.info('Plugin succefully started. Jails: %s' % (self.jails_list))
+        return True
+
+    def create_dimensions(self):
+        self.definitions = {'jails_group':
+                                {'options':
+                                     [None, "Jails ban statistics", "bans/s", 'Jails', 'jail.ban', 'line'], 'lines': []}}
+        for jail in self.jails_list:
+            self.definitions['jails_group']['lines'].append([jail, jail, 'absolute'])
diff --git a/python.d/freeradius.chart.py b/python.d/freeradius.chart.py
new file mode 100644
index 00000000..2ac280f0
--- /dev/null
+++ b/python.d/freeradius.chart.py
@@ -0,0 +1,114 @@
+# -*- coding: utf-8 -*-
+# Description: freeradius netdata python.d module
+# Author: l2isbad
+
+from base import SimpleService
+from os.path import isfile
+from re import findall
+from subprocess import Popen, PIPE
+
+# default module values (can be overridden per job in `config`)
+priority = 60000
+retries = 60
+update_every = 15
+directories = ['/bin/', '/usr/bin/', '/sbin/', '/usr/sbin/']
+
+# charts order (can be overridden if you want less charts, or different order)
+ORDER = ['authentication', 'accounting', 'proxy-auth', 'proxy-acct']
+
+CHARTS = {
+    'authentication': {
+        'options': [None, "Authentication", "packets/s", 'Authentication', 'freerad.auth', 'line'],
+        'lines': [
+            ['access-accepts', None, 'incremental'], ['access-rejects', None, 'incremental'],
+            ['auth-dropped-requests', None, 'incremental'], ['auth-duplicate-requests', None, 'incremental'],
+            ['auth-invalid-requests', None, 'incremental'], ['auth-malformed-requests', None, 'incremental'],
+            ['auth-unknown-types', None, 'incremental']
+        ]},
+     'accounting': {
+        'options': [None, "Accounting", "packets/s", 'Accounting', 'freerad.acct', 'line'],
+        'lines': [
+            ['accounting-requests', None, 'incremental'], ['accounting-responses', None, 'incremental'],
+            ['acct-dropped-requests', None, 'incremental'], ['acct-duplicate-requests', None, 'incremental'],
+            ['acct-invalid-requests', None, 'incremental'], ['acct-malformed-requests', None, 'incremental'],
+            ['acct-unknown-types', None, 'incremental']
+        ]},
+    'proxy-auth': {
+        'options': [None, "Proxy Authentication", "packets/s", 'Authentication', 'freerad.proxy.auth', 'line'],
+        'lines': [
+            ['proxy-access-accepts', None, 'incremental'], ['proxy-access-rejects', None, 'incremental'],
+            ['proxy-auth-dropped-requests', None, 'incremental'], ['proxy-auth-duplicate-requests', None, 'incremental'],
+            ['proxy-auth-invalid-requests', None, 'incremental'], ['proxy-auth-malformed-requests', None, 'incremental'],
+            ['proxy-auth-unknown-types', None, 'incremental']
+        ]},
+     'proxy-acct': {
+        'options': [None, "Proxy Accounting", "packets/s", 'Accounting', 'freerad.proxy.acct', 'line'],
+        'lines': [
+            ['proxy-accounting-requests', None, 'incremental'], ['proxy-accounting-responses', None, 'incremental'],
+            ['proxy-acct-dropped-requests', None, 'incremental'], ['proxy-acct-duplicate-requests', None, 'incremental'],
+            ['proxy-acct-invalid-requests', None, 'incremental'], ['proxy-acct-malformed-requests', None, 'incremental'],
+            ['proxy-acct-unknown-types', None, 'incremental']
+        ]}
+
+}
+
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        self.host = self.configuration.get('host', 'localhost')
+        self.port = self.configuration.get('port', '18121')
+        self.secret = self.configuration.get('secret', 'adminsecret')
+        self.acct = self.configuration.get('acct', False)
+        self.proxy_auth = self.configuration.get('proxy_auth', False)
+        self.proxy_acct = self.configuration.get('proxy_acct', False)
+        try:
+            self.echo = [''.join([directory, 'echo']) for directory in directories if isfile(''.join([directory, 'echo']))][0]
+            self.radclient = [''.join([directory, 'radclient']) for directory in directories if isfile(''.join([directory, 'radclient']))][0]
+        except IndexError:
+            self.echo = []
+            self.radclient = []
+        self.sub_echo = [self.echo, 'Message-Authenticator = 0x00, FreeRADIUS-Statistics-Type = 15, Response-Packet-Type = Access-Accept']
+        self.sub_radclient = [self.radclient, '-r', '1', '-t', '1', ':'.join([self.host, self.port]), 'status', self.secret]
+    
+    def check(self):
+        if not all([self.echo, self.radclient]):
+            self.error('Command radclient not found')
+            return False
+        if self._get_raw_data():
+            chart_choice = [True, bool(self.acct), bool(self.proxy_auth), bool(self.proxy_acct)]
+            self.order = [chart for chart, choice in zip(ORDER, chart_choice) if choice]
+            self.definitions = {k:v for k, v in CHARTS.items() if k in self.order}
+            self.info('Plugin was started succesfully')
+            return True
+        else:
+            self.error('Request returned no data. Is server alive? Used options: host {}, port {}, secret {}'.format(self.host, self.port, self.secret))
+            return False
+        
+
+    def _get_data(self):
+        """
+        Format data received from shell command
+        :return: dict
+        """
+        result = self._get_raw_data()
+        return {k.lower():int(v) for k, v in findall(r'((?<=-)[AP][a-zA-Z-]+) = (\d+)', result)}
+        
+    def _get_raw_data(self):
+        """
+        The following code is equivalent to
+        'echo "Message-Authenticator = 0x00, FreeRADIUS-Statistics-Type = 15, Response-Packet-Type = Access-Accept" | radclient -t 1 -r 1 host:port status secret'
+        :return: str
+        """
+        try:
+            process_echo = Popen(self.sub_echo, stdout=PIPE, stderr=PIPE, shell=False)
+            process_rad = Popen(self.sub_radclient, stdin=process_echo.stdout, stdout=PIPE, stderr=PIPE, shell=False)
+            process_echo.stdout.close()
+            raw_result = process_rad.communicate()[0]
+        except Exception:
+            return None
+        else:
+            if process_rad.returncode is 0:
+                return raw_result.decode()
+            else:
+                return None
diff --git a/python.d/gunicorn_log.chart.py b/python.d/gunicorn_log.chart.py
new file mode 100644
index 00000000..94596363
--- /dev/null
+++ b/python.d/gunicorn_log.chart.py
@@ -0,0 +1,72 @@
+# -*- coding: utf-8 -*-
+# Description: nginx log netdata python.d module
+# Author: Pawel Krupa (paulfantom)
+# Modified for Gunicorn by: Jeff Willette (deltaskelta)
+
+from base import LogService 
+import re
+
+priority = 60000
+retries = 60
+# update_every = 3
+
+ORDER = ['codes']
+CHARTS = {
+    'codes': {
+        'options': [None, 'gunicorn status codes', 'requests/s', 'requests', 'gunicorn_log.codes', 'stacked'],
+        'lines': [
+            ["2xx", None, "incremental"],
+            ["3xx", None, "incremental"],
+            ["4xx", None, "incremental"],
+            ["5xx", None, "incremental"]
+        ]}
+}
+
+
+class Service(LogService):
+    def __init__(self, configuration=None, name=None):
+        LogService.__init__(self, configuration=configuration, name=name)
+        if len(self.log_path) == 0:
+            self.log_path = "/var/log/gunicorn/access.log"
+        self.order = ORDER
+        self.definitions = CHARTS
+        pattern = r'" ([0-9]{3}) '
+        #pattern = r'(?:" )([0-9][0-9][0-9]) ?'
+        self.regex = re.compile(pattern)
+
+    def _get_data(self):
+        """
+        Parse new log lines
+        :return: dict
+        """
+        data = {'2xx': 0,
+                '3xx': 0,
+                '4xx': 0,
+                '5xx': 0}
+        try:
+            raw = self._get_raw_data()
+            if raw is None:
+                return None
+            elif not raw:
+                return data
+        except (ValueError, AttributeError):
+            return None
+
+        regex = self.regex
+        for line in raw:
+            code = regex.search(line)
+            try:
+                beginning = code.group(1)[0]
+            except AttributeError:
+                continue
+
+            if beginning == '2':
+                data["2xx"] += 1
+            elif beginning == '3':
+                data["3xx"] += 1
+            elif beginning == '4':
+                data["4xx"] += 1
+            elif beginning == '5':
+                data["5xx"] += 1
+
+        return data
diff --git a/python.d/haproxy.chart.py b/python.d/haproxy.chart.py
new file mode 100644
index 00000000..2fb97d75
--- /dev/null
+++ b/python.d/haproxy.chart.py
@@ -0,0 +1,177 @@
+# -*- coding: utf-8 -*-
+# Description: haproxy netdata python.d module
+# Author: l2isbad
+
+from base import UrlService, SocketService
+
+# default module values (can be overridden per job in `config`)
+# update_every = 2
+priority = 60000
+retries = 60
+
+# charts order (can be overridden if you want less charts, or different order)
+ORDER = ['fbin', 'fbout', 'fscur', 'fqcur', 'bbin', 'bbout', 'bscur', 'bqcur', 'health_sdown', 'health_bdown']
+CHARTS = {
+    'fbin': {
+        'options': [None, "Kilobytes in", "kilobytes in/s", 'Frontend', 'haproxy_f.bin', 'line'],
+        'lines': [
+        ]},
+    'fbout': {
+        'options': [None, "Kilobytes out", "kilobytes out/s", 'Frontend', 'haproxy_f.bout', 'line'],
+        'lines': [
+        ]},
+    'fscur': {
+        'options': [None, "Sessions active", "sessions", 'Frontend', 'haproxy_f.scur', 'line'],
+        'lines': [
+        ]},
+    'fqcur': {
+        'options': [None, "Session in queue", "sessions", 'Frontend', 'haproxy_f.qcur', 'line'],
+        'lines': [
+        ]},
+    'bbin': {
+        'options': [None, "Kilobytes in", "kilobytes in/s", 'Backend', 'haproxy_b.bin', 'line'],
+        'lines': [
+        ]},
+    'bbout': {
+        'options': [None, "Kilobytes out", "kilobytes out/s", 'Backend', 'haproxy_b.bout', 'line'],
+        'lines': [
+        ]},
+    'bscur': {
+        'options': [None, "Sessions active", "sessions", 'Backend', 'haproxy_b.scur', 'line'],
+        'lines': [
+        ]},
+    'bqcur': {
+        'options': [None, "Sessions in queue", "sessions", 'Backend', 'haproxy_b.qcur', 'line'],
+        'lines': [
+        ]},
+    'health_sdown': {
+        'options': [None, "Number of servers in backend in DOWN state", "failed servers", 'Health', 'haproxy_hs.down', 'line'],
+        'lines': [
+        ]},
+    'health_bdown': {
+        'options': [None, "Is backend alive? 1 = DOWN", "failed backend", 'Health', 'haproxy_hb.down', 'line'],
+        'lines': [
+        ]}
+}
+
+
+class Service(UrlService, SocketService):
+    def __init__(self, configuration=None, name=None):
+        SocketService.__init__(self, configuration=configuration, name=name)
+        self.user = self.configuration.get('user')
+        self.password = self.configuration.get('pass')
+        self.request = 'show stat\n'
+        self.poll_method = (UrlService, SocketService)
+        self.order = ORDER
+        self.order_front = [_ for _ in ORDER if _.startswith('f')]
+        self.order_back = [_ for _ in ORDER if _.startswith('b')]
+        self.definitions = CHARTS
+        self.charts = True
+
+    def check(self):
+        if self.configuration.get('url'):
+            self.poll_method = self.poll_method[0]
+            url = self.configuration.get('url')
+            if not url.endswith(';csv;norefresh'):
+                self.error('Bad url(%s). Must be http://<ip.address>:<port>/<url>;csv;norefresh' % url)
+                return False
+        elif self.configuration.get('socket'):
+            self.poll_method = self.poll_method[1]
+        else:
+            self.error('No configuration is specified')
+            return False
+
+        if self.poll_method.check(self):
+            self.info('Plugin was started succesfully. We are using %s.' % self.poll_method.__name__)
+            return True
+
+    def create_charts(self, front_ends, back_ends):
+        for _ in range(len(front_ends)):
+            self.definitions['fbin']['lines'].append(['_'.join(['fbin', front_ends[_]['# pxname']]), front_ends[_]['# pxname'], 'incremental', 1, 1024])
+            self.definitions['fbout']['lines'].append(['_'.join(['fbout', front_ends[_]['# pxname']]), front_ends[_]['# pxname'], 'incremental', 1, 1024])
+            self.definitions['fscur']['lines'].append(['_'.join(['fscur', front_ends[_]['# pxname']]), front_ends[_]['# pxname'], 'absolute'])
+            self.definitions['fqcur']['lines'].append(['_'.join(['fqcur', front_ends[_]['# pxname']]), front_ends[_]['# pxname'], 'absolute'])
+        
+        for _ in range(len(back_ends)):
+            self.definitions['bbin']['lines'].append(['_'.join(['bbin', back_ends[_]['# pxname']]), back_ends[_]['# pxname'], 'incremental', 1, 1024])
+            self.definitions['bbout']['lines'].append(['_'.join(['bbout', back_ends[_]['# pxname']]), back_ends[_]['# pxname'], 'incremental', 1, 1024])
+            self.definitions['bscur']['lines'].append(['_'.join(['bscur', back_ends[_]['# pxname']]), back_ends[_]['# pxname'], 'absolute'])
+            self.definitions['bqcur']['lines'].append(['_'.join(['bqcur', back_ends[_]['# pxname']]), back_ends[_]['# pxname'], 'absolute'])
+            self.definitions['health_sdown']['lines'].append(['_'.join(['hsdown', back_ends[_]['# pxname']]), back_ends[_]['# pxname'], 'absolute'])
+            self.definitions['health_bdown']['lines'].append(['_'.join(['hbdown', back_ends[_]['# pxname']]), back_ends[_]['# pxname'], 'absolute'])
+                
+    def _get_data(self):
+        """
+        Format data received from http request
+        :return: dict
+        """
+        try:
+            raw_data = self.poll_method._get_raw_data(self).splitlines()
+        except Exception as e:
+            self.error(str(e))
+            return None
+
+        all_instances = [dict(zip(raw_data[0].split(','), raw_data[_].split(','))) for _ in range(1, len(raw_data))]
+
+        back_ends = list(filter(is_backend, all_instances))
+        front_ends = list(filter(is_frontend, all_instances))
+        servers = list(filter(is_server, all_instances))
+
+        if self.charts:
+            self.create_charts(front_ends, back_ends)
+            self.charts = False
+
+        to_netdata = dict()
+
+        for frontend in front_ends:
+            for _ in self.order_front:
+                to_netdata.update({'_'.join([_, frontend['# pxname']]): int(frontend[_[1:]]) if frontend.get(_[1:]) else 0})
+
+        for backend in back_ends:
+            for _ in self.order_back:
+                to_netdata.update({'_'.join([_, backend['# pxname']]): int(backend[_[1:]]) if backend.get(_[1:]) else 0})
+
+        for _ in range(len(back_ends)):
+            to_netdata.update({'_'.join(['hsdown', back_ends[_]['# pxname']]):
+                           len([server for server in servers if is_server_down(server, back_ends, _)])})
+            to_netdata.update({'_'.join(['hbdown', back_ends[_]['# pxname']]): 1 if is_backend_down(back_ends, _) else 0})
+
+        return to_netdata
+
+    def _check_raw_data(self, data):
+        """
+        Check if all data has been gathered from socket
+        :param data: str
+        :return: boolean
+        """
+        return not bool(data)
+
+def is_backend(backend):
+    try:
+        return backend['svname'] == 'BACKEND' and backend['# pxname'] != 'stats'
+    except Exception:
+        return False
+
+def is_frontend(frontend):
+    try:
+        return frontend['svname'] == 'FRONTEND' and frontend['# pxname'] != 'stats'
+    except Exception:
+        return False
+
+def is_server(server):
+    try:
+        return not server['svname'].startswith(('FRONTEND', 'BACKEND'))
+    except Exception:
+        return False
+
+def is_server_down(server, back_ends, _):
+    try:
+        return server['# pxname'] == back_ends[_]['# pxname'] and server['status'] == 'DOWN'
+    except Exception:
+        return False
+
+def is_backend_down(back_ends, _):
+    try:
+        return back_ends[_]['status'] == 'DOWN'
+    except Exception:
+        return False
diff --git a/python.d/hddtemp.chart.py b/python.d/hddtemp.chart.py
index 465bfdfa..8a98995b 100644
--- a/python.d/hddtemp.chart.py
+++ b/python.d/hddtemp.chart.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 # Description: hddtemp netdata python.d module
 # Author: Pawel Krupa (paulfantom)
+# Modified by l2isbad
 
 import os
 from base import SocketService
@@ -21,15 +22,6 @@ retries = 60
 
 ORDER = ['temperatures']
 
-CHARTS = {
-    'temperatures': {
-        'options': ['disks_temp', 'temperature', 'Celsius', 'Disks temperature', 'hddtemp.temperatures', 'line'],
-        'lines': [
-            # lines are created dynamically in `check()` method
-        ]}
-}
-
-
 class Service(SocketService):
     def __init__(self, configuration=None, name=None):
         SocketService.__init__(self, configuration=configuration, name=name)
@@ -38,7 +30,10 @@ class Service(SocketService):
         self.host = "127.0.0.1"
         self.port = 7634
         self.order = ORDER
-        self.definitions = CHARTS
+        self.fahrenheit = ('Fahrenheit', lambda x: x * 9 / 5 + 32)  if self.configuration.get('fahrenheit') else False
+        self.whatever = ('Whatever', lambda x: x * 33 / 22 + 11) if self.configuration.get('whatever') else False
+        self.choice = (choice for choice in [self.fahrenheit, self.whatever] if choice)
+        self.calc = lambda x: x
         self.disks = []
 
     def _get_disks(self):
@@ -82,7 +77,7 @@ class Service(SocketService):
             if not raw[i*5+1] in self.disks:
                 continue
             try:
-                val = int(raw[i*5+3])
+                val = self.calc(int(raw[i*5+3]))
             except ValueError:
                 val = 0
             data[raw[i*5+1].replace("/dev/", "")] = val
@@ -105,9 +100,21 @@ class Service(SocketService):
         if data is None:
             return False
 
+        self.definitions = {
+            'temperatures': {
+            'options': ['disks_temp', 'Disks Temperatures', 'temperatures', 'hddtemp.temperatures', 'line'],
+            'lines': [
+                # lines are created dynamically in `check()` method
+                          ]}
+                      }
+        try:
+            self.choice = next(self.choice)
+        except StopIteration:
+            self.definitions[ORDER[0]]['options'].insert(2, 'Celsius')
+        else:
+            self.calc = self.choice[1]
+            self.definitions[ORDER[0]]['options'].insert(2, self.choice[0])
+
         for name in data:
             self.definitions[ORDER[0]]['lines'].append([name])
-
         return True
-
-
diff --git a/python.d/ipfs.chart.py b/python.d/ipfs.chart.py
index b0b2a965..eaea3c5e 100644
--- a/python.d/ipfs.chart.py
+++ b/python.d/ipfs.chart.py
@@ -19,7 +19,7 @@ retries = 60
 # }}
 
 # charts order (can be overridden if you want less charts, or different order)
-ORDER = ['bandwidth', 'peers']
+ORDER = ['bandwidth', 'peers', 'repo_size', 'repo_objects']
 
 CHARTS = {
     'bandwidth': {
@@ -32,9 +32,25 @@ CHARTS = {
         'options': [None, 'IPFS Peers', 'peers', 'Peers', 'ipfs.peers', 'line'],
         'lines': [
             ["peers", None, 'absolute']
-        ]}
+        ]},
+    'repo_size': {
+        'options': [None, 'IPFS Repo Size', 'GB', 'Size', 'ipfs.repo_size', 'area'],
+        'lines': [
+            ["avail", None, "absolute", 1, 1e9],
+            ["size", None, "absolute", 1, 1e9],
+        ]},
+    'repo_objects': {
+        'options': [None, 'IPFS Repo Objects', 'objects', 'Objects', 'ipfs.repo_objects', 'line'],
+        'lines': [
+            ["objects", None, "absolute", 1, 1],
+            ["pinned", None, "absolute", 1, 1],
+            ["recursive_pins", None, "absolute", 1, 1]
+        ]},
 }
 
+SI_zeroes = {'k': 3, 'm': 6, 'g': 9, 't': 12,
+             'p': 15, 'e': 18, 'z': 21, 'y': 24 }
+
 
 class Service(UrlService):
     def __init__(self, configuration=None, name=None):
@@ -45,63 +61,63 @@ class Service(UrlService):
             self.baseurl = "http://localhost:5001"
         self.order = ORDER
         self.definitions = CHARTS
+        self.__storagemax = None
 
-    def _get_bandwidth(self):
+    def _get_json(self, suburl):
         """
-        Format data received from http request
-        :return: int, int
+        :return: json decoding of the specified url
         """
-        self.url = self.baseurl + "/api/v0/stats/bw"
-        try:
-            raw = self._get_raw_data()
-        except AttributeError:
-            return None
-
+        self.url = self.baseurl + suburl
         try:
-            parsed = json.loads(raw)
-            bw_in = int(parsed['RateIn'])
-            bw_out = int(parsed['RateOut'])
+            return json.loads(self._get_raw_data())
         except:
-            return None
+            return {}
 
-        return bw_in, bw_out
+    def _recursive_pins(self, keys):
+        return len([k for k in keys if keys[k]["Type"] == b"recursive"])
 
-    def _get_peers(self):
-        """
-        Format data received from http request
-        :return: int
-        """
-        self.url = self.baseurl + "/api/v0/swarm/peers"
-        try:
-            raw = self._get_raw_data()
-        except AttributeError:
-            return None
-
-        try:
-            parsed = json.loads(raw)
-            peers = len(parsed['Strings'])
-        except:
-            return None
+    def _dehumanize(self, storemax):
+        # convert from '10Gb' to 10000000000
+        if type(storemax) != int:
+            storemax = storemax.lower()
+            if storemax.endswith('b'):
+                val, units = storemax[:-2], storemax[-2]
+                if units in SI_zeroes:
+                    val += '0'*SI_zeroes[units]
+                storemax = val
+            try:
+                storemax = int(storemax)
+            except:
+                storemax = None
+        return storemax
 
-        return peers
+    def _storagemax(self, storecfg):
+        if self.__storagemax is None:
+            self.__storagemax = self._dehumanize(storecfg['StorageMax'])
+        return self.__storagemax
 
     def _get_data(self):
         """
         Get data from API
         :return: dict
         """
-        try:
-            peers = self._get_peers()
-            bandwidth_in, bandwidth_out = self._get_bandwidth()
-        except:
-            return None
-        data = {}
-        if peers is not None:
-            data['peers'] = peers
-        if bandwidth_in is not None and bandwidth_out is not None:
-            data['in'] = bandwidth_in
-            data['out'] = bandwidth_out
+        cfg = { # suburl : List of (result-key, original-key, transform-func)
+               '/api/v0/stats/bw'   :[('in', 'RateIn', int ),
+                                      ('out', 'RateOut', int )],
+               '/api/v0/swarm/peers':[('peers', 'Strings', len )],
+               '/api/v0/stats/repo' :[('size', 'RepoSize', int),
+                                      ('objects', 'NumObjects', int)],
+               '/api/v0/pin/ls': [('pinned', 'Keys', len),
+                                  ('recursive_pins', 'Keys', self._recursive_pins)],
+               '/api/v0/config/show': [('avail', 'Datastore', self._storagemax)]
+        }
+        r = {}
+        for suburl in cfg:
+            json = self._get_json(suburl)
+            for newkey, origkey, xmute in cfg[suburl]:
+                try:
+                    r[newkey] = xmute(json[origkey])
+                except: pass
+        return r or None
+
 
-        if len(data) == 0:
-            return None
-        return data
diff --git a/python.d/isc_dhcpd.chart.py b/python.d/isc_dhcpd.chart.py
new file mode 100644
index 00000000..54fbfb1f
--- /dev/null
+++ b/python.d/isc_dhcpd.chart.py
@@ -0,0 +1,167 @@
+# -*- coding: utf-8 -*-
+# Description: isc dhcpd lease netdata python.d module
+# Author: l2isbad
+
+from base import SimpleService
+from time import mktime, strptime, gmtime, time
+from os import stat
+try:
+    from ipaddress import IPv4Address as ipaddress
+    from ipaddress import ip_network
+    have_ipaddress = True
+except ImportError:
+    have_ipaddress = False
+try:
+    from itertools import filterfalse as filterfalse
+except ImportError:
+    from itertools import ifilterfalse as filterfalse
+
+
+priority = 60000
+retries = 60
+update_every = 60
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        self.leases_path = self.configuration.get('leases_path', '/var/lib/dhcp/dhcpd.leases')
+        self.pools = self.configuration.get('pools')
+
+        # Will work only with 'default' db-time-format (weekday year/month/day hour:minute:second)
+        # TODO: update algorithm to parse correctly 'local' db-time-format
+        # (epoch <seconds-since-epoch>; # <day-name> <month-name> <day-number> <hours>:<minutes>:<seconds> <year>)
+        # Also only ipv4 supported
+
+    def check(self):
+        if not self._get_raw_data():
+            self.error('Make sure leases_path is correct and leases log file is readable by netdata')
+            return False
+        elif not have_ipaddress:
+            self.error('No ipaddress module. Please install (py2-ipaddress in case of python2)')
+            return False
+        else:
+            try:
+                self.pools = self.pools.split()
+                if not [ip_network(return_utf(pool)) for pool in self.pools]:
+                    self.error('Pools list is empty')
+                    return False
+            except (ValueError, IndexError, AttributeError, SyntaxError) as e:
+                self.error('Pools configurations is incorrect', str(e))
+                return False
+            
+            # Creating static charts
+            self.order = ['parse_time', 'leases_size', 'utilization', 'total']
+            self.definitions = {'utilization':
+                                    {'options':
+                                         [None, 'Pools utilization', 'used %', 'Utilization', 'isc_dhcpd.util', 'line'],
+                                     'lines': []},
+                                 'total':
+                                   {'options':
+                                        [None, 'Total all pools', 'leases', 'Utilization', 'isc_dhcpd.total', 'line'],
+                                    'lines': [['total', 'leases', 'absolute']]},
+                               'parse_time':
+                                   {'options':
+                                        [None, 'Parse time', 'ms', 'Parse stats', 'isc_dhcpd.parse', 'line'],
+                                    'lines': [['ptime', 'time', 'absolute']]},
+                               'leases_size':
+                                   {'options':
+                                        [None, 'dhcpd.leases file size', 'kilobytes', 'Parse stats', 'isc_dhcpd.lsize', 'line'],
+                                    'lines': [['lsize', 'size', 'absolute']]}}
+            # Creating dynamic charts
+            for pool in self.pools:
+                self.definitions['utilization']['lines'].append([''.join(['ut_', pool]), pool, 'absolute'])
+                self.order.append(''.join(['leases_', pool]))
+                self.definitions[''.join(['leases_', pool])] = \
+                    {'options': [None, 'Active leases', 'leases', 'Pools', 'isc_dhcpd.lease', 'area'], 
+                     'lines': [[''.join(['le_', pool]), pool, 'absolute']]}
+
+            self.info('Plugin was started succesfully')
+            return True
+
+    def _get_raw_data(self):
+        """
+        Parses log file
+        :return: tuple(
+                       [ipaddress, lease end time, ...],
+                       time to parse leases file
+                      )
+        """
+        try:
+            with open(self.leases_path, 'rt') as dhcp_leases:
+                time_start = time()
+                part1 = filterfalse(find_lease, dhcp_leases)
+                part2 = filterfalse(find_ends, dhcp_leases)
+                raw_result = dict(zip(part1, part2))
+                time_end = time()
+
+                file_parse_time = round((time_end - time_start) * 1000)
+
+        except Exception as e:
+            self.error("Failed to parse leases file:", str(e))
+            return None
+
+        else:
+            result = (raw_result, file_parse_time)
+            return result
+
+    def _get_data(self):
+        """
+        :return: dict
+        """
+        raw_leases = self._get_raw_data()
+        
+        if not raw_leases:
+            return None
+
+        # Result: {ipaddress: end lease time, ...}
+        all_leases = {k[6:len(k)-3]:v[7:len(v)-2] for k, v in raw_leases[0].items()}
+
+        # Result: [active binding, active binding....]. (Expire time (ends date;) - current time > 0)
+        active_leases = [k for k, v in all_leases.items() if is_binding_active(all_leases[k])]
+
+        # Result: {pool: number of active bindings in pool, ...}
+        pools_count = {pool: len([lease for lease in active_leases if is_address_in(lease, pool)])
+                       for pool in self.pools}
+
+        # Result: {pool: number of host ip addresses in pool, ...}
+        pools_max = {pool: (2 ** (32 - int(pool.split('/')[1])) - 2)
+                     for pool in self.pools}
+
+        # Result: {pool: % utilization, ....} (percent)
+        pools_util = {pool:int(round(float(pools_count[pool]) / pools_max[pool] * 100, 0))
+                      for pool in self.pools}
+
+        # Bulding dicts to send to netdata
+        final_count = {''.join(['le_', k]): v for k, v in pools_count.items()}
+        final_util = {''.join(['ut_', k]): v for k, v in pools_util.items()}
+        
+        to_netdata = {'total': len(active_leases)}
+        to_netdata.update({'lsize': int(stat(self.leases_path)[6] / 1024)})
+        to_netdata.update({'ptime': int(raw_leases[1])})
+        to_netdata.update(final_util)
+        to_netdata.update(final_count)
+
+        return to_netdata
+
+
+def is_binding_active(binding):
+    return mktime(strptime(binding, '%w %Y/%m/%d %H:%M:%S')) - mktime(gmtime()) > 0
+
+
+def is_address_in(address, pool):
+    return ipaddress(return_utf(address)) in ip_network(return_utf(pool))
+
+
+def find_lease(value):
+    return value[0:3] != 'lea'
+
+
+def find_ends(value):
+    return value[2:6] != 'ends'
+
+def return_utf(s):
+    # python2 returns "<type 'str'>" for simple strings
+    # python3 returns "<class 'str'>" for unicode strings
+    if str(type(s)) == "<type 'str'>":
+        return unicode(s, 'utf-8')
+    return s
diff --git a/python.d/mdstat.chart.py b/python.d/mdstat.chart.py
new file mode 100644
index 00000000..0f7d2b44
--- /dev/null
+++ b/python.d/mdstat.chart.py
@@ -0,0 +1,99 @@
+# -*- coding: utf-8 -*-
+# Description: mdstat netdata python.d module
+# Author: l2isbad
+
+from base import SimpleService
+from re import compile
+priority = 60000
+retries = 60
+update_every = 1
+
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        self.order = ['agr_health']
+        self.definitions = {'agr_health':
+                                {'options':
+                                     [None, 'Faulty devices in MD', 'failed disks', 'health', 'md.health', 'line'],
+                                 'lines': []}}
+        self.proc_mdstat = '/proc/mdstat'
+        self.regex_disks = compile(r'((?<=\ )[a-zA-Z_0-9]+(?= : active)).*?((?<= \[)[0-9]+)/([0-9]+(?=\] ))')
+        self.regex_status = compile(r'([a-zA-Z_0-9]+)( : active)[^:]*?([a-z]+) = ([0-9.]+(?=%)).*?((?<=finish=)[0-9.]+)min speed=([0-9]+)')
+
+    def check(self):
+        raw_data = self._get_raw_data()
+        if not raw_data:
+            self.error('Cant read mdstat data from %s' % (self.proc_mdstat))
+            return False
+        
+        md_list = [md[0] for md in self.regex_disks.findall(raw_data)]
+
+        if not md_list:
+            self.error('No active arrays in %s' % (self.proc_mdstat))
+            return False
+        else:
+            for md in md_list:
+                self.order.append(md)
+                self.order.append(''.join([md, '_status']))
+                self.order.append(''.join([md, '_rate']))
+                self.definitions['agr_health']['lines'].append([''.join([md, '_health']), md, 'absolute'])
+                self.definitions[md] = {'options':
+                                            [None, '%s disks stats' % md, 'disks', md, 'md.disks', 'stacked'],
+                                        'lines': [[''.join([md, '_total']), 'total', 'absolute'],
+                                                  [''.join([md, '_inuse']), 'inuse', 'absolute']]}
+                self.definitions[''.join([md, '_status'])] = {'options':
+                                            [None, '%s current status' % md, 'percent', md, 'md.status', 'line'],
+                                        'lines': [[''.join([md, '_resync']), 'resync', 'absolute', 1, 100],
+                                                  [''.join([md, '_recovery']), 'recovery', 'absolute', 1, 100],
+                                                  [''.join([md, '_reshape']), 'reshape', 'absolute', 1, 100],
+                                                  [''.join([md, '_check']), 'check', 'absolute', 1, 100]]}
+                self.definitions[''.join([md, '_rate'])] = {'options':
+                                            [None, '%s operation status' % md, 'rate', md, 'md.rate', 'line'],
+                                        'lines': [[''.join([md, '_finishin']), 'finish min', 'absolute', 1, 100],
+                                                  [''.join([md, '_rate']), 'megabyte/s', 'absolute', -1, 100]]}
+            self.info('Plugin was started successfully. MDs to monitor %s' % (md_list))
+
+            return True
+
+    def _get_raw_data(self):
+        """
+        Read data from /proc/mdstat
+        :return: str
+        """
+        try:
+            with open(self.proc_mdstat, 'rt') as proc_mdstat:
+                raw_result = proc_mdstat.read()
+        except Exception:
+            return None
+        else:
+            raw_result = ' '.join(raw_result.split())
+            return raw_result
+
+    def _get_data(self):
+        """
+        Parse data from _get_raw_data()
+        :return: dict
+        """
+        raw_mdstat = self._get_raw_data()
+        mdstat_disks = self.regex_disks.findall(raw_mdstat)
+        mdstat_status = self.regex_status.findall(raw_mdstat)
+        to_netdata = {}
+
+        for md in mdstat_disks:
+            to_netdata[''.join([md[0], '_total'])] = int(md[1])
+            to_netdata[''.join([md[0], '_inuse'])] = int(md[2])
+            to_netdata[''.join([md[0], '_health'])] = int(md[1]) - int(md[2])
+            to_netdata[''.join([md[0], '_check'])] = 0
+            to_netdata[''.join([md[0], '_resync'])] = 0
+            to_netdata[''.join([md[0], '_reshape'])] = 0
+            to_netdata[''.join([md[0], '_recovery'])] = 0
+            to_netdata[''.join([md[0], '_finishin'])] = 0
+            to_netdata[''.join([md[0], '_rate'])] = 0
+        
+        for md in mdstat_status:
+            to_netdata[''.join([md[0], '_' + md[2]])] = round(float(md[3]) * 100)
+            to_netdata[''.join([md[0], '_finishin'])] = round(float(md[4]) * 100)
+            to_netdata[''.join([md[0], '_rate'])] = round(float(md[5]) / 1000 * 100)
+
+        return to_netdata
diff --git a/python.d/memcached.chart.py b/python.d/memcached.chart.py
index 5a1400c9..0d6807ba 100644
--- a/python.d/memcached.chart.py
+++ b/python.d/memcached.chart.py
@@ -20,89 +20,89 @@ retries = 60
 #          }}
 
 ORDER = ['cache', 'net', 'connections', 'items', 'evicted_reclaimed',
-         'get', 'get_rate', 'set_rate', 'delete', 'cas', 'increment', 'decrement', 'touch', 'touch_rate']
+         'get', 'get_rate', 'set_rate', 'cas', 'delete', 'increment', 'decrement', 'touch', 'touch_rate']
 
 CHARTS = {
     'cache': {
-        'options': [None, 'Cache Size', 'megabytes', 'Cache', 'memcached.cache', 'stacked'],
+        'options': [None, 'Cache Size', 'megabytes', 'cache', 'memcached.cache', 'stacked'],
         'lines': [
-            ['used', 'used', 'absolute', 1, 1048576],
-            ['avail', 'available', 'absolute', 1, 1048576]
+            ['avail', 'available', 'absolute', 1, 1048576],
+            ['used', 'used', 'absolute', 1, 1048576]
         ]},
     'net': {
-        'options': [None, 'Network', 'kilobytes/s', 'Network', 'memcached.net', 'line'],
+        'options': [None, 'Network', 'kilobits/s', 'network', 'memcached.net', 'area'],
         'lines': [
-            ['bytes_read', 'read', 'incremental', 1, 1024],
-            ['bytes_written', 'written', 'incremental', 1, 1024]
+            ['bytes_read', 'in', 'incremental', 8, 1024],
+            ['bytes_written', 'out', 'incremental', -8, 1024]
         ]},
     'connections': {
-        'options': [None, 'Connections', 'connections/s', 'Cluster', 'memcached.connections', 'line'],
+        'options': [None, 'Connections', 'connections/s', 'connections', 'memcached.connections', 'line'],
         'lines': [
             ['curr_connections', 'current', 'incremental'],
             ['rejected_connections', 'rejected', 'incremental'],
             ['total_connections', 'total', 'incremental']
         ]},
     'items': {
-        'options': [None, 'Items', 'items', 'Cluster', 'memcached.items', 'line'],
+        'options': [None, 'Items', 'items', 'items', 'memcached.items', 'line'],
         'lines': [
             ['curr_items', 'current', 'absolute'],
             ['total_items', 'total', 'absolute']
         ]},
     'evicted_reclaimed': {
-        'options': [None, 'Items', 'items', 'Evicted and Reclaimed', 'memcached.evicted_reclaimed', 'line'],
+        'options': [None, 'Items', 'items', 'items', 'memcached.evicted_reclaimed', 'line'],
         'lines': [
-            ['evictions', 'evicted', 'absolute'],
-            ['reclaimed', 'reclaimed', 'absolute']
+            ['reclaimed', 'reclaimed', 'absolute'],
+            ['evictions', 'evicted', 'absolute']
         ]},
     'get': {
-        'options': [None, 'Requests', 'requests', 'GET', 'memcached.get', 'stacked'],
+        'options': [None, 'Requests', 'requests', 'get ops', 'memcached.get', 'stacked'],
         'lines': [
             ['get_hits', 'hits', 'percent-of-absolute-row'],
             ['get_misses', 'misses', 'percent-of-absolute-row']
         ]},
     'get_rate': {
-        'options': [None, 'Rate', 'requests/s', 'GET', 'memcached.get_rate', 'line'],
+        'options': [None, 'Rate', 'requests/s', 'get ops', 'memcached.get_rate', 'line'],
         'lines': [
             ['cmd_get', 'rate', 'incremental']
         ]},
     'set_rate': {
-        'options': [None, 'Rate', 'requests/s', 'SET', 'memcached.set_rate', 'line'],
+        'options': [None, 'Rate', 'requests/s', 'set ops', 'memcached.set_rate', 'line'],
         'lines': [
             ['cmd_set', 'rate', 'incremental']
         ]},
     'delete': {
-        'options': [None, 'Requests', 'requests', 'DELETE', 'memcached.delete', 'stacked'],
+        'options': [None, 'Requests', 'requests', 'delete ops', 'memcached.delete', 'stacked'],
         'lines': [
             ['delete_hits', 'hits', 'percent-of-absolute-row'],
             ['delete_misses', 'misses', 'percent-of-absolute-row'],
         ]},
     'cas': {
-        'options': [None, 'Requests', 'requests', 'CAS', 'memcached.cas', 'stacked'],
+        'options': [None, 'Requests', 'requests', 'check and set ops', 'memcached.cas', 'stacked'],
         'lines': [
             ['cas_hits', 'hits', 'percent-of-absolute-row'],
             ['cas_misses', 'misses', 'percent-of-absolute-row'],
             ['cas_badval', 'bad value', 'percent-of-absolute-row']
         ]},
     'increment': {
-        'options': [None, 'Requests', 'requests', 'Increment', 'memcached.increment', 'stacked'],
+        'options': [None, 'Requests', 'requests', 'increment ops', 'memcached.increment', 'stacked'],
         'lines': [
             ['incr_hits', 'hits', 'percent-of-absolute-row'],
             ['incr_misses', 'misses', 'percent-of-absolute-row']
         ]},
     'decrement': {
-        'options': [None, 'Requests', 'requests', 'Decrement', 'memcached.decrement', 'stacked'],
+        'options': [None, 'Requests', 'requests', 'decrement ops', 'memcached.decrement', 'stacked'],
         'lines': [
             ['decr_hits', 'hits', 'percent-of-absolute-row'],
             ['decr_misses', 'misses', 'percent-of-absolute-row']
         ]},
     'touch': {
-        'options': [None, 'Requests', 'requests', 'Touch', 'memcached.touch', 'stacked'],
+        'options': [None, 'Requests', 'requests', 'touch ops', 'memcached.touch', 'stacked'],
         'lines': [
             ['touch_hits', 'hits', 'percent-of-absolute-row'],
             ['touch_misses', 'misses', 'percent-of-absolute-row']
         ]},
     'touch_rate': {
-        'options': [None, 'Rate', 'requests/s', 'Touch', 'memcached.touch_rate', 'line'],
+        'options': [None, 'Rate', 'requests/s', 'touch ops', 'memcached.touch_rate', 'line'],
         'lines': [
             ['cmd_touch', 'rate', 'incremental']
         ]}
@@ -125,44 +125,52 @@ class Service(SocketService):
         Get data from socket
         :return: dict
         """
+        response = self._get_raw_data()
+        if response is None:
+            # error has already been logged
+            return None
+
+        if response.startswith('ERROR'):
+            self.error("received ERROR")
+            return None
+
         try:
-            raw = self._get_raw_data().split("\n")
+            parsed = response.split("\n")
         except AttributeError:
-            self.error("no data received")
-            return None
-        if raw[0].startswith('ERROR'):
-            self.error("Memcached returned ERROR")
+            self.error("response is invalid/empty")
             return None
+
+        # split the response
         data = {}
-        for line in raw:
+        for line in parsed:
             if line.startswith('STAT'):
                 try:
                     t = line[5:].split(' ')
-                    data[t[0]] = int(t[1])
+                    data[t[0]] = t[1]
                 except (IndexError, ValueError):
+                    self.debug("invalid line received: " + str(line))
                     pass
-        try:
-            data['hit_rate'] = int((data['keyspace_hits'] / float(data['keyspace_hits'] + data['keyspace_misses'])) * 100)
-        except:
-            data['hit_rate'] = 0
 
+        if len(data) == 0:
+            self.error("received data doesn't have any records")
+            return None
+
+        # custom calculations
         try:
             data['avail'] = int(data['limit_maxbytes']) - int(data['bytes'])
-            data['used'] = data['bytes']
+            data['used'] = int(data['bytes'])
         except:
             pass
 
-        if len(data) == 0:
-            self.error("received data doesn't have needed records")
-            return None
-        else:
-            return data
+        return data
 
     def _check_raw_data(self, data):
         if data.endswith('END\r\n'):
+            self.debug("received full response from memcached")
             return True
-        else:
-            return False
+
+        self.debug("waiting more data from memcached")
+        return False
 
     def check(self):
         """
diff --git a/python.d/mysql.chart.py b/python.d/mysql.chart.py
index dab6fad3..0e3a0329 100644
--- a/python.d/mysql.chart.py
+++ b/python.d/mysql.chart.py
@@ -40,6 +40,7 @@ retries = 60
 
 # query executed on MySQL server
 QUERY = "SHOW GLOBAL STATUS;"
+QUERY_SLAVE = "SHOW SLAVE STATUS;"
 
 ORDER = ['net',
          'queries',
@@ -55,7 +56,7 @@ ORDER = ['net',
          'innodb_buffer_pool_read_ahead', 'innodb_buffer_pool_reqs', 'innodb_buffer_pool_ops',
          'qcache_ops', 'qcache', 'qcache_freemem', 'qcache_memblocks',
          'key_blocks', 'key_requests', 'key_disk_ops',
-         'files', 'files_rate']
+         'files', 'files_rate', 'slave_behind', 'slave_status']
 
 CHARTS = {
     'net': {
@@ -298,8 +299,18 @@ CHARTS = {
             ["Connection_errors_peer_address", "peer_addr", "incremental"],
             ["Connection_errors_select", "select", "incremental"],
             ["Connection_errors_tcpwrap", "tcpwrap", "incremental"]
+        ]},
+    'slave_behind': {
+        'options': [None, 'Slave Behind Seconds', 'seconds', 'slave', 'mysql.slave_behind', 'line'],
+        'lines': [
+            ["slave_behind", "seconds", "absolute"]
+        ]},
+    'slave_status': {
+        'options': [None, 'Slave Status', 'status', 'slave', 'mysql.slave_status', 'line'],
+        'lines': [
+            ["slave_sql", "sql_running", "absolute"],
+            ["slave_io", "io_running", "absolute"]
         ]}
-
 }
 
 
@@ -310,6 +321,7 @@ class Service(SimpleService):
         self.order = ORDER
         self.definitions = CHARTS
         self.connection = None
+        self.do_slave = -1
 
     def _parse_config(self, configuration):
         """
@@ -348,6 +360,67 @@ class Service(SimpleService):
             self.error("problem connecting to server:", e)
             raise RuntimeError
 
+    def _get_data_slave(self):
+        """
+        Get slave raw data from MySQL server
+        :return: dict
+        """
+        if self.connection is None:
+            try:
+                self._connect()
+            except RuntimeError:
+                return None
+
+        slave_data = None
+        slave_raw_data = None
+        try:
+            cursor = self.connection.cursor()
+            if cursor.execute(QUERY_SLAVE):
+                slave_raw_data = dict(list(zip([elem[0] for elem in cursor.description], cursor.fetchone())))
+
+        except MySQLdb.OperationalError as e:
+            self.debug("Reconnecting for query", QUERY_SLAVE, ":", str(e))
+            try:
+                self._connect()
+                cursor = self.connection.cursor()
+                if cursor.execute(QUERY_SLAVE):
+                    slave_raw_data = dict(list(zip([elem[0] for elem in cursor.description], cursor.fetchone())))
+            except Exception as e:
+                self.error("retried, but cannot execute query", QUERY_SLAVE, ":", str(e))
+                self.connection.close()
+                self.connection = None
+                return None
+
+        except Exception as e:
+            self.error("cannot execute query", QUERY_SLAVE, ":", str(e))
+            self.connection.close()
+            self.connection = None
+            return None
+
+        if slave_raw_data is not None:
+            slave_data = {
+                'slave_behind': None,
+                'slave_sql': None,
+                'slave_io': None
+            }
+
+            try:
+                slave_data['slave_behind'] = int(slave_raw_data.setdefault('Seconds_Behind_Master', -1))
+            except:
+                slave_data['slave_behind'] = None
+
+            try:
+                slave_data['slave_sql'] = 1 if slave_raw_data.get('Slave_SQL_Running') == 'Yes' else -1
+            except:
+                slave_data['slave_sql'] = None
+
+            try:
+                slave_data['slave_io'] = 1 if slave_raw_data.get('Slave_IO_Running') == 'Yes' else -1
+            except:
+                slave_data['slave_io'] = None
+
+        return slave_data
+
     def _get_data(self):
         """
         Get raw data from MySQL server
@@ -362,23 +435,47 @@ class Service(SimpleService):
             cursor = self.connection.cursor()
             cursor.execute(QUERY)
             raw_data = cursor.fetchall()
+
         except MySQLdb.OperationalError as e:
-            self.debug("Reconnecting due to", str(e))
-            self._connect()
-            cursor = self.connection.cursor()
-            cursor.execute(QUERY)
-            raw_data = cursor.fetchall()
+            self.debug("Reconnecting for query", QUERY, ":", str(e))
+            try:
+                self._connect()
+                cursor = self.connection.cursor()
+                cursor.execute(QUERY)
+                raw_data = cursor.fetchall()
+            except Exception as e:
+                self.error("retried, but cannot execute query", QUERY, ":", str(e))
+                self.connection.close()
+                self.connection = None
+                return None
+
         except Exception as e:
-            self.error("cannot execute query.", e)
+            self.error("cannot execute query", QUERY, ":", str(e))
             self.connection.close()
             self.connection = None
             return None
 
         data = dict(raw_data)
+
+        # check for slave data
+        # the first time is -1 (so we do it)
+        # then it is set to 1 or 0 and we keep it like that
+        if self.do_slave != 0:
+            slave_data = self._get_data_slave()
+            if slave_data is not None:
+                data.update(slave_data)
+                if self.do_slave == -1:
+                    self.do_slave = 1
+            else:
+                if self.do_slave == -1:
+                    self.error("replication metrics will be disabled - please allow netdata to collect them.")
+                    self.do_slave = 0
+
+        # do calculations
         try:
-            data["Thread_cache_misses"] = int(data["Threads_created"] * 10000 / float(data["Connections"]))
+            data["Thread_cache_misses"] = round(float(data["Threads_created"]) / float(data["Connections"]) * 10000)
         except:
-            data["Thread_cache_misses"] = 0
+            data["Thread_cache_misses"] = None
 
         return data
 
diff --git a/python.d/nginx.chart.py b/python.d/nginx.chart.py
index ff8bfede..88849a92 100644
--- a/python.d/nginx.chart.py
+++ b/python.d/nginx.chart.py
@@ -22,24 +22,24 @@ ORDER = ['connections', 'requests', 'connection_status', 'connect_rate']
 
 CHARTS = {
     'connections': {
-        'options': [None, 'nginx Active Connections', 'connections', 'nginx', 'nginx.connections', 'line'],
+        'options': [None, 'nginx Active Connections', 'connections', 'active connections', 'nginx.connections', 'line'],
         'lines': [
             ["active"]
         ]},
     'requests': {
-        'options': [None, 'nginx Requests', 'requests/s', 'nginx', 'nginx.requests', 'line'],
+        'options': [None, 'nginx Requests', 'requests/s', 'requests', 'nginx.requests', 'line'],
         'lines': [
             ["requests", None, 'incremental']
         ]},
     'connection_status': {
-        'options': [None, 'nginx Active Connections by Status', 'connections', 'nginx', 'nginx.connection_status', 'line'],
+        'options': [None, 'nginx Active Connections by Status', 'connections', 'status', 'nginx.connection_status', 'line'],
         'lines': [
             ["reading"],
             ["writing"],
             ["waiting", "idle"]
         ]},
     'connect_rate': {
-        'options': [None, 'nginx Connections Rate', 'connections/s', 'nginx', 'nginx.connect_rate', 'line'],
+        'options': [None, 'nginx Connections Rate', 'connections/s', 'connections rate', 'nginx.connect_rate', 'line'],
         'lines': [
             ["accepts", "accepted", "incremental"],
             ["handled", None, "incremental"]
diff --git a/python.d/nginx_log.chart.py b/python.d/nginx_log.chart.py
index 95fb123d..ef964a56 100644
--- a/python.d/nginx_log.chart.py
+++ b/python.d/nginx_log.chart.py
@@ -15,9 +15,11 @@ CHARTS = {
         'options': [None, 'nginx status codes', 'requests/s', 'requests', 'nginx_log.codes', 'stacked'],
         'lines': [
             ["2xx", None, "incremental"],
+            ["5xx", None, "incremental"],
             ["3xx", None, "incremental"],
             ["4xx", None, "incremental"],
-            ["5xx", None, "incremental"]
+            ["1xx", None, "incremental"],
+            ["other", None, "incremental"]
         ]}
 }
 
@@ -33,37 +35,48 @@ class Service(LogService):
         #pattern = r'(?:" )([0-9][0-9][0-9]) ?'
         self.regex = re.compile(pattern)
 
+        self.data = {
+            '1xx': 0,
+            '2xx': 0,
+            '3xx': 0,
+            '4xx': 0,
+            '5xx': 0,
+            'other': 0
+        }
+
     def _get_data(self):
         """
         Parse new log lines
         :return: dict
         """
-        data = {'2xx': 0,
-                '3xx': 0,
-                '4xx': 0,
-                '5xx': 0}
         try:
             raw = self._get_raw_data()
             if raw is None:
                 return None
             elif not raw:
-                return data
+                return self.data
         except (ValueError, AttributeError):
             return None
 
         regex = self.regex
         for line in raw:
             code = regex.search(line)
-            beginning = code.group(1)[0]
+            try:
+                beginning = code.group(1)[0]
+            except AttributeError:
+                continue
 
             if beginning == '2':
-                data["2xx"] += 1
+                self.data["2xx"] += 1
             elif beginning == '3':
-                data["3xx"] += 1
+                self.data["3xx"] += 1
             elif beginning == '4':
-                data["4xx"] += 1
+                self.data["4xx"] += 1
             elif beginning == '5':
-                data["5xx"] += 1
-
-        return data
+                self.data["5xx"] += 1
+            elif beginning == '1':
+                self.data["1xx"] += 1
+            else:
+                self.data["other"] += 1
 
+        return self.data
diff --git a/python.d/ovpn_status_log.chart.py b/python.d/ovpn_status_log.chart.py
new file mode 100644
index 00000000..c5fca002
--- /dev/null
+++ b/python.d/ovpn_status_log.chart.py
@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+# Description: openvpn status log netdata python.d module
+# Author: l2isbad
+
+from base import SimpleService
+from re import compile, findall, search, subn
+priority = 60000
+retries = 60
+update_every = 10
+
+ORDER = ['users', 'traffic']
+CHARTS = {
+    'users': {
+        'options': [None, 'OpenVPN active users', 'active users', 'Users', 'openvpn_status.users', 'line'],
+        'lines': [
+            ["users", None, "absolute"],
+        ]},
+    'traffic': {
+        'options': [None, 'OpenVPN traffic', 'kilobit/s', 'Traffic', 'openvpn_status.traffic', 'area'],
+        'lines': [
+            ["in", None, "incremental", 8, 1000], ["out", None, "incremental", 8, -1000]
+        ]},
+
+}
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        self.order = ORDER
+        self.definitions = CHARTS
+        self.log_path = self.configuration.get('log_path')
+        self.regex_data_inter = compile(r'(?<=Since ).*?(?=.ROUTING)')
+        self.regex_data_final = compile(r'\d{1,3}(?:\.\d{1,3}){3}[:0-9,. ]*')
+        self.regex_users = compile(r'\d{1,3}(?:\.\d{1,3}){3}:\d+')
+        self.regex_traffic = compile(r'(?<=(?:,| ))\d+(?=(?:,| ))')
+
+    def check(self):
+        if not self._get_raw_data():
+            self.error('Make sure that the openvpn status log file exists and netdata has permission to read it')
+            return False
+        else:
+            self.info('Plugin was started succesfully')
+            return True
+
+    def _get_raw_data(self):
+        """
+        Open log file
+        :return: str
+        """
+        try:
+            with open(self.log_path, 'rt') as log:
+                result = log.read()
+        except Exception:
+            return None
+        else:
+            return result
+
+    def _get_data(self):
+        """
+        Parse openvpn-status log file.
+        Current regex version is ok for status-version 1, 2 and 3. Both users and bytes in/out are collecting.
+        """
+
+        raw_data = self._get_raw_data()
+        try:
+            data_inter = self.regex_data_inter.search(' '.join(raw_data.splitlines())).group()
+        except AttributeError:
+            data_inter = ''
+
+        data_final = ' '.join(self.regex_data_final.findall(data_inter))
+        users = self.regex_users.subn('', data_final)[1]
+        traffic = self.regex_traffic.findall(data_final)
+
+        bytes_in = sum([int(traffic[i]) for i in range(len(traffic)) if (i + 1) % 2 is 1])
+        bytes_out = sum([int(traffic[i]) for i in range(len(traffic)) if (i + 1) % 2 is 0])
+
+        return {'users': users, 'in': bytes_in, 'out': bytes_out}
diff --git a/python.d/phpfpm.chart.py b/python.d/phpfpm.chart.py
index d4168cc1..b79a35d7 100755
--- a/python.d/phpfpm.chart.py
+++ b/python.d/phpfpm.chart.py
@@ -23,37 +23,37 @@ ORDER = ['connections', 'requests', 'performance', 'request_duration', 'request_
 
 CHARTS = {
     'connections': {
-        'options': [None, 'PHP-FPM Active Connections', 'connections', 'phpfpm', 'phpfpm.connections', 'line'],
+        'options': [None, 'PHP-FPM Active Connections', 'connections', 'active connections', 'phpfpm.connections', 'line'],
         'lines': [
             ["active"],
             ["maxActive", 'max active'],
             ["idle"]
         ]},
     'requests': {
-        'options': [None, 'PHP-FPM Requests', 'requests/s', 'phpfpm', 'phpfpm.requests', 'line'],
+        'options': [None, 'PHP-FPM Requests', 'requests/s', 'requests', 'phpfpm.requests', 'line'],
         'lines': [
             ["requests", None, "incremental"]
         ]},
     'performance': {
-        'options': [None, 'PHP-FPM Performance', 'status', 'phpfpm', 'phpfpm.performance', 'line'],
+        'options': [None, 'PHP-FPM Performance', 'status', 'performance', 'phpfpm.performance', 'line'],
         'lines': [
             ["reached", 'max children reached'],
             ["slow", 'slow requests']
         ]},
     'request_duration': {
-        'options': [None, 'PHP-FPM Request Duration', 'milliseconds', 'phpfpm', 'phpfpm.request_duration', 'line'],
+        'options': [None, 'PHP-FPM Request Duration', 'milliseconds', 'request duration', 'phpfpm.request_duration', 'line'],
         'lines': [
             ["maxReqDur", 'max request duration'],
             ["avgReqDur", 'average request duration']
         ]},
     'request_cpu': {
-        'options': [None, 'PHP-FPM Request CPU', 'percent', 'phpfpm', 'phpfpm.request_cpu', 'line'],
+        'options': [None, 'PHP-FPM Request CPU', 'percent', 'request CPU', 'phpfpm.request_cpu', 'line'],
         'lines': [
             ["maxReqCPU", 'max request cpu'],
             ["avgReqCPU", 'average request cpu']
         ]},
     'request_mem': {
-        'options': [None, 'PHP-FPM Request Memory', 'kilobytes', 'phpfpm', 'phpfpm.request_mem', 'line'],
+        'options': [None, 'PHP-FPM Request Memory', 'kilobytes', 'request memory', 'phpfpm.request_mem', 'line'],
         'lines': [
             ["maxReqMem", 'max request memory'],
             ["avgReqMem", 'average request memory']
@@ -93,9 +93,14 @@ class Service(UrlService):
                 raw_json = json.loads(raw)
             except ValueError:
                 return None
-            data = {self.assignment[k]: v for k, v in raw_json.items() if k in self.assignment}
+            data = {}
+            for k,v in raw_json.items():
+                if k in self.assignment:
+                    data[self.assignment[k]] = v
+
             if '&full' in self.url or '?full' in self.url:
                 c = 0
+                sum_val = {}
                 for proc in raw_json['processes']:
                     if proc['state'] != 'Idle':
                         continue
@@ -108,9 +113,14 @@ class Service(UrlService):
                             d = d/1024
                         if 'max' + v not in data or data['max' + v] < d:
                             data['max' + v] = d
-                        if 'avg' + v not in data:
+                        if 'avg' + v not in sum_val:
+                            sum_val['avg' + v] = 0
                             data['avg' + v] = 0
-                        data['avg' + v] = (data['avg' + v] + d) / c
+                        sum_val['avg' + v] += d
+                if len(sum_val):
+                    for k, v in sum_val.items():
+                        data[k] = v/c
+
             if len(data) == 0:
                 return None
             return data
diff --git a/python.d/postgres.chart.py b/python.d/postgres.chart.py
new file mode 100644
index 00000000..919b6f8e
--- /dev/null
+++ b/python.d/postgres.chart.py
@@ -0,0 +1,386 @@
+# -*- coding: utf-8 -*-
+# Description: example netdata python.d module
+# Authors: facetoe, dangtranhoang
+
+import re
+from copy import deepcopy
+
+import psycopg2
+from psycopg2 import extensions
+from psycopg2.extras import DictCursor
+
+from base import SimpleService
+
+# default module values
+update_every = 1
+priority = 90000
+retries = 60
+
+ARCHIVE = """
+SELECT
+    CAST(COUNT(*) AS INT) AS file_count,
+    CAST(COALESCE(SUM(CAST(archive_file ~ $r$\.ready$$r$ as INT)), 0) AS INT) AS ready_count,
+    CAST(COALESCE(SUM(CAST(archive_file ~ $r$\.done$$r$ AS INT)), 0) AS INT) AS done_count
+FROM
+    pg_catalog.pg_ls_dir('pg_xlog/archive_status') AS archive_files (archive_file);
+"""
+
+BACKENDS = """
+SELECT
+    count(*) - (SELECT count(*) FROM pg_stat_activity WHERE state = 'idle') AS backends_active,
+    (SELECT count(*) FROM pg_stat_activity WHERE state = 'idle' ) AS backends_idle
+FROM
+    pg_stat_activity;
+"""
+
+TABLE_STATS = """
+SELECT
+  ((sum(relpages) * 8) * 1024) AS size_relations,
+  count(1)                     AS relations
+FROM pg_class
+WHERE relkind IN ('r', 't');
+"""
+
+INDEX_STATS = """
+SELECT
+  ((sum(relpages) * 8) * 1024) AS size_indexes,
+  count(1)                     AS indexes
+FROM pg_class
+WHERE relkind = 'i';"""
+
+DATABASE = """
+SELECT
+  datname AS database_name,
+  sum(numbackends) AS connections,
+  sum(xact_commit) AS xact_commit,
+  sum(xact_rollback) AS xact_rollback,
+  sum(blks_read) AS blks_read,
+  sum(blks_hit) AS blks_hit,
+  sum(tup_returned) AS tup_returned,
+  sum(tup_fetched) AS tup_fetched,
+  sum(tup_inserted) AS tup_inserted,
+  sum(tup_updated) AS tup_updated,
+  sum(tup_deleted) AS tup_deleted,
+  sum(conflicts) AS conflicts
+FROM pg_stat_database
+WHERE NOT datname ~* '^template\d+'
+GROUP BY database_name;
+"""
+
+BGWRITER = 'SELECT * FROM pg_stat_bgwriter;'
+DATABASE_LOCKS = """
+SELECT
+  pg_database.datname as database_name,
+  mode,
+  count(mode) AS count
+FROM pg_locks
+  INNER JOIN pg_database ON pg_database.oid = pg_locks.database
+GROUP BY datname, mode
+ORDER BY datname, mode;
+"""
+REPLICATION = """
+SELECT
+    client_hostname,
+    client_addr,
+    state,
+    sent_offset - (
+        replay_offset - (sent_xlog - replay_xlog) * 255 * 16 ^ 6 ) AS byte_lag
+FROM (
+    SELECT
+        client_addr, client_hostname, state,
+        ('x' || lpad(split_part(sent_location::text,   '/', 1), 8, '0'))::bit(32)::bigint AS sent_xlog,
+        ('x' || lpad(split_part(replay_location::text, '/', 1), 8, '0'))::bit(32)::bigint AS replay_xlog,
+        ('x' || lpad(split_part(sent_location::text,   '/', 2), 8, '0'))::bit(32)::bigint AS sent_offset,
+        ('x' || lpad(split_part(replay_location::text, '/', 2), 8, '0'))::bit(32)::bigint AS replay_offset
+    FROM pg_stat_replication
+) AS s;
+"""
+
+LOCK_TYPES = [
+    'ExclusiveLock',
+    'RowShareLock',
+    'SIReadLock',
+    'ShareUpdateExclusiveLock',
+    'AccessExclusiveLock',
+    'AccessShareLock',
+    'ShareRowExclusiveLock',
+    'ShareLock',
+    'RowExclusiveLock'
+]
+
+ORDER = ['db_stat_transactions', 'db_stat_tuple_read', 'db_stat_tuple_returned', 'db_stat_tuple_write',
+         'backend_process', 'index_count', 'index_size', 'table_count', 'table_size', 'wal', 'background_writer']
+
+CHARTS = {
+    'db_stat_transactions': {
+        'options': [None, 'Transactions on db', 'transactions/s', 'db statistics', 'postgres.db_stat_transactions', 'line'],
+        'lines': [
+            ['db_stat_xact_commit',   'committed',   'incremental'],
+            ['db_stat_xact_rollback', 'rolled back', 'incremental']
+        ]},
+    'db_stat_connections': {
+        'options': [None, 'Current connections to db', 'count', 'db statistics', 'postgres.db_stat_connections', 'line'],
+        'lines': [
+            ['db_stat_connections', 'connections', 'absolute']
+        ]},
+    'db_stat_tuple_read': {
+        'options': [None, 'Tuple reads from db', 'reads/s', 'db statistics', 'postgres.db_stat_tuple_read', 'line'],
+        'lines': [
+            ['db_stat_blks_read', 'disk',  'incremental'],
+            ['db_stat_blks_hit',  'cache', 'incremental']
+        ]},
+    'db_stat_tuple_returned': {
+        'options': [None, 'Tuples returned from db', 'tuples/s', 'db statistics', 'postgres.db_stat_tuple_returned', 'line'],
+        'lines': [
+            ['db_stat_tup_returned', 'sequential', 'incremental'],
+            ['db_stat_tup_fetched',  'bitmap',     'incremental']
+        ]},
+    'db_stat_tuple_write': {
+        'options': [None, 'Tuples written to db', 'writes/s', 'db statistics', 'postgres.db_stat_tuple_write', 'line'],
+        'lines': [
+            ['db_stat_tup_inserted', 'inserted',  'incremental'],
+            ['db_stat_tup_updated',  'updated',   'incremental'],
+            ['db_stat_tup_deleted',  'deleted',   'incremental'],
+            ['db_stat_conflicts',    'conflicts', 'incremental']
+        ]},
+    'backend_process': {
+        'options': [None, 'Current Backend Processes', 'processes', 'backend processes', 'postgres.backend_process', 'line'],
+        'lines': [
+            ['backend_process_active', 'active', 'absolute'],
+            ['backend_process_idle',   'idle',   'absolute']
+        ]},
+    'index_count': {
+        'options': [None, 'Total indexes', 'index', 'indexes', 'postgres.index_count', 'line'],
+        'lines': [
+            ['index_count', 'total', 'absolute']
+        ]},
+    'index_size': {
+        'options': [None, 'Indexes size', 'MB', 'indexes', 'postgres.index_size', 'line'],
+        'lines': [
+            ['index_size', 'size', 'absolute', 1, 1024 * 1024]
+        ]},
+    'table_count': {
+        'options': [None, 'Total Tables', 'tables', 'tables', 'postgres.table_count', 'line'],
+        'lines': [
+            ['table_count', 'total', 'absolute']
+        ]},
+    'table_size': {
+        'options': [None, 'Tables size', 'MB', 'tables', 'postgres.table_size', 'line'],
+        'lines': [
+            ['table_size', 'size', 'absolute', 1, 1024 * 1024]
+        ]},
+    'wal': {
+        'options': [None, 'Write-Ahead Logging Statistics', 'files/s', 'write ahead log', 'postgres.wal', 'line'],
+        'lines': [
+            ['wal_total', 'total', 'incremental'],
+            ['wal_ready', 'ready', 'incremental'],
+            ['wal_done',  'done',  'incremental']
+        ]},
+    'background_writer': {
+        'options': [None, 'Checkpoints', 'writes/s', 'background writer', 'postgres.background_writer', 'line'],
+        'lines': [
+            ['background_writer_scheduled', 'scheduled', 'incremental'],
+            ['background_writer_requested', 'requested', 'incremental']
+        ]}
+}
+
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        super(self.__class__, self).__init__(configuration=configuration, name=name)
+        self.order = ORDER
+        self.definitions = CHARTS
+        self.table_stats = configuration.pop('table_stats', True)
+        self.index_stats = configuration.pop('index_stats', True)
+        self.configuration = configuration
+        self.connection = None
+        self.is_superuser = False
+        self.data = {}
+        self.databases = set()
+
+    def _connect(self):
+        params = dict(user='postgres',
+                      database=None,
+                      password=None,
+                      host='localhost',
+                      port=5432)
+        params.update(self.configuration)
+
+        if not self.connection:
+            self.connection = psycopg2.connect(**params)
+            self.connection.set_isolation_level(extensions.ISOLATION_LEVEL_AUTOCOMMIT)
+            self.connection.set_session(readonly=True)
+
+    def check(self):
+        try:
+            self._connect()
+            cursor = self.connection.cursor()
+            self._discover_databases(cursor)
+            self._check_if_superuser(cursor)
+            cursor.close()
+
+            self._create_definitions()
+            return True
+        except Exception as e:
+            self.error(str(e))
+            return False
+
+    def _discover_databases(self, cursor):
+        cursor.execute("""
+            SELECT datname
+            FROM pg_stat_database
+            WHERE NOT datname ~* '^template\d+'
+        """)
+        self.databases = set(r[0] for r in cursor)
+
+    def _check_if_superuser(self, cursor):
+        cursor.execute("""
+            SELECT current_setting('is_superuser') = 'on' AS is_superuser;
+        """)
+        self.is_superuser = cursor.fetchone()[0]
+
+    def _create_definitions(self):
+        for database_name in self.databases:
+            for chart_template_name in list(CHARTS):
+                if chart_template_name.startswith('db_stat'):
+                    self._add_database_stat_chart(chart_template_name, database_name)
+            self._add_database_lock_chart(database_name)
+
+    def _add_database_stat_chart(self, chart_template_name, database_name):
+        chart_template = CHARTS[chart_template_name]
+        chart_name = "{0}_{1}".format(database_name, chart_template_name)
+        if chart_name not in self.order:
+            self.order.insert(0, chart_name)
+            name, title, units, family, context, chart_type = chart_template['options']
+            self.definitions[chart_name] = {
+                'options': [
+                    name,
+                    title + ': ' + database_name,
+                    units,
+                    'db ' + database_name,
+                    context,
+                    chart_type
+                ]
+            }
+
+            self.definitions[chart_name]['lines'] = []
+            for line in deepcopy(chart_template['lines']):
+                line[0] = "{0}_{1}".format(database_name, line[0])
+                self.definitions[chart_name]['lines'].append(line)
+
+    def _add_database_lock_chart(self, database_name):
+        chart_name = "{0}_locks".format(database_name)
+        if chart_name not in self.order:
+            self.order.insert(-1, chart_name)
+            self.definitions[chart_name] = dict(
+                options=
+                [
+                    None,
+                    'Locks on db: ' + database_name,
+                    'locks',
+                    'db ' + database_name,
+                    'postgres.db_locks',
+                    'line'
+                ],
+                lines=[]
+            )
+
+            for lock_type in LOCK_TYPES:
+                lock_id = "{0}_{1}".format(database_name, lock_type)
+                label = re.sub("([a-z])([A-Z])", "\g<1> \g<2>", lock_type)
+                self.definitions[chart_name]['lines'].append([lock_id, label, 'absolute'])
+
+    def _get_data(self):
+        self._connect()
+
+        cursor = self.connection.cursor(cursor_factory=DictCursor)
+        self.add_stats(cursor)
+
+        cursor.close()
+        return self.data
+
+    def add_stats(self, cursor):
+        self.add_database_stats(cursor)
+        self.add_backend_stats(cursor)
+        if self.index_stats:
+            self.add_index_stats(cursor)
+        if self.table_stats:
+            self.add_table_stats(cursor)
+        self.add_lock_stats(cursor)
+        self.add_bgwriter_stats(cursor)
+
+        # self.add_replication_stats(cursor)
+
+        if self.is_superuser:
+            self.add_wal_stats(cursor)
+
+    def add_database_stats(self, cursor):
+        cursor.execute(DATABASE)
+        for row in cursor:
+            database_name = row.get('database_name')
+            self.data["{0}_{1}".format(database_name, 'db_stat_xact_commit')]   = int(row.get('xact_commit',   0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_xact_rollback')] = int(row.get('xact_rollback', 0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_blks_read')]     = int(row.get('blks_read',     0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_blks_hit')]      = int(row.get('blks_hit',      0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_tup_returned')]  = int(row.get('tup_returned',  0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_tup_fetched')]   = int(row.get('tup_fetched',   0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_tup_inserted')]  = int(row.get('tup_inserted',  0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_tup_updated')]   = int(row.get('tup_updated',   0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_tup_deleted')]   = int(row.get('tup_deleted',   0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_conflicts')]     = int(row.get('conflicts',     0))
+            self.data["{0}_{1}".format(database_name, 'db_stat_connections')]   = int(row.get('connections',   0))
+
+    def add_backend_stats(self, cursor):
+        cursor.execute(BACKENDS)
+        temp = cursor.fetchone()
+
+        self.data['backend_process_active'] = int(temp.get('backends_active', 0))
+        self.data['backend_process_idle']   = int(temp.get('backends_idle',   0))
+
+    def add_index_stats(self, cursor):
+        cursor.execute(INDEX_STATS)
+        temp = cursor.fetchone()
+        self.data['index_count'] = int(temp.get('indexes',      0))
+        self.data['index_size']  = int(temp.get('size_indexes', 0))
+
+    def add_table_stats(self, cursor):
+        cursor.execute(TABLE_STATS)
+        temp = cursor.fetchone()
+        self.data['table_count'] = int(temp.get('relations',      0))
+        self.data['table_size']  = int(temp.get('size_relations', 0))
+
+    def add_lock_stats(self, cursor):
+        cursor.execute(DATABASE_LOCKS)
+
+        # zero out all current lock values
+        for database_name in self.databases:
+            for lock_type in LOCK_TYPES:
+                self.data["{0}_{1}".format(database_name, lock_type)] = 0
+
+        # populate those that have current locks
+        for row in cursor:
+            database_name, lock_type, lock_count = row
+            self.data["{0}_{1}".format(database_name, lock_type)] = lock_count
+
+    def add_wal_stats(self, cursor):
+        cursor.execute(ARCHIVE)
+        temp = cursor.fetchone()
+        self.data['wal_total'] = int(temp.get('file_count',  0))
+        self.data['wal_ready'] = int(temp.get('ready_count', 0))
+        self.data['wal_done']  = int(temp.get('done_count',  0))
+
+    def add_bgwriter_stats(self, cursor):
+        cursor.execute(BGWRITER)
+        temp = cursor.fetchone()
+        self.data['background_writer_scheduled'] = temp.get('checkpoints_timed',    0)
+        self.data['background_writer_requested'] = temp.get('checkpoints_requests', 0)
+
+'''
+    def add_replication_stats(self, cursor):
+        cursor.execute(REPLICATION)
+        temp = cursor.fetchall()
+        for row in temp:
+            self.add_gauge_value('Replication/%s' % row.get('client_addr', 'Unknown'),
+                                 'byte_lag',
+                                 int(row.get('byte_lag', 0)))
+'''
diff --git a/python.d/python_modules/base.py b/python.d/python_modules/base.py
index 1508e096..320c54ba 100644
--- a/python.d/python_modules/base.py
+++ b/python.d/python_modules/base.py
@@ -116,33 +116,21 @@ class SimpleService(threading.Thread):
         Return value presents exit status of update()
         :return: boolean
         """
-        t_start = time.time()
-        timetable = self.timetable
+        t_start = float(time.time())
         chart_name = self.chart_name
-        # check if it is time to execute job update() function
-        if timetable['next'] > t_start:
-            self.debug(chart_name, "will be run in", str(int((timetable['next'] - t_start) * 1000)), "ms")
-            return True
 
-        since_last = int((t_start - timetable['last']) * 1000000)
-        self.debug(chart_name,
-                   "ready to run, after", str(int((t_start - timetable['last']) * 1000)),
-                   "ms (update_every:", str(timetable['freq'] * 1000),
-                   "ms, latency:", str(int((t_start - timetable['next']) * 1000)), "ms")
+        since_last = int((t_start - self.timetable['last']) * 1000000)
         if self.__first_run:
             since_last = 0
+
         if not self.update(since_last):
             self.error("update function failed.")
             return False
-        t_end = time.time()
-        self.timetable['next'] = t_end - (t_end % timetable['freq']) + timetable['freq']
+
         # draw performance graph
-        run_time = str(int((t_end - t_start) * 1000))
-        # noinspection SqlNoDataSourceInspection
+        run_time = int((time.time() - t_start) * 1000)
         print("BEGIN netdata.plugin_pythond_%s %s\nSET run_time = %s\nEND\n" %
-              (self.chart_name, str(since_last), run_time))
-        # sys.stdout.write("BEGIN netdata.plugin_pythond_%s %s\nSET run_time = %s\nEND\n" %
-        #                  (self.chart_name, str(since_last), run_time))
+              (self.chart_name, str(since_last), str(run_time)))
 
         self.debug(chart_name, "updated in", str(run_time), "ms")
         self.timetable['last'] = t_start
@@ -155,23 +143,48 @@ class SimpleService(threading.Thread):
         Exits when job failed or timed out.
         :return: None
         """
-        self.timetable['last'] = time.time()
+        step = float(self.timetable['freq'])
+        penalty = 0
+        self.timetable['last'] = float(time.time() - step)
+        self.debug("starting data collection - update frequency:", str(step), " retries allowed:", str(self.retries))
         while True:  # run forever, unless something is wrong
+            now = float(time.time())
+            next = self.timetable['next'] = now - (now % step) + step + penalty
+
+            # it is important to do this in a loop
+            # sleep() is interruptable
+            while now < next:
+                self.debug("sleeping for", str(next - now), "secs to reach frequency of", str(step), "secs, now:", str(now), " next:", str(next), " penalty:", str(penalty))
+                time.sleep(next - now)
+                now = float(time.time())
+
+            # do the job
             try:
                 status = self._run_once()
             except Exception as e:
-                self.error("Something wrong: ", str(e))
-                return
-            if status:  # handle retries if update failed
-                time.sleep(self.timetable['next'] - time.time())
+                status = False
+
+            if status:
+                # it is good
                 self.retries_left = self.retries
+                penalty = 0
             else:
+                # it failed
                 self.retries_left -= 1
                 if self.retries_left <= 0:
-                    self.error("no more retries. Exiting")
-                    return
+                    if penalty == 0:
+                        penalty = float(self.retries * step) / 2
+                    else:
+                        penalty *= 1.5
+
+                    if penalty > 600:
+                        penalty = 600
+
+                    self.retries_left = self.retries
+                    self.alert("failed to collect data for " + str(self.retries) + " times - increasing penalty to " + str(penalty) + " sec and trying again")
+
                 else:
-                    time.sleep(self.timetable['freq'])
+                    self.error("failed to collect data - " + str(self.retries_left) + " retries left - penalty: " + str(penalty) + " sec")
 
     # --- CHART ---
 
@@ -307,7 +320,10 @@ class SimpleService(threading.Thread):
         """
         Upload new data to netdata.
         """
-        print(self._data_stream)
+        try:
+            print(self._data_stream)
+        except Exception as e:
+            msg.fatal('cannot send data to netdata:', str(e))
         self._data_stream = ""
 
     # --- ERROR HANDLING ---
@@ -318,6 +334,12 @@ class SimpleService(threading.Thread):
         """
         msg.error(self.chart_name, *params)
 
+    def alert(self, *params):
+        """
+        Show error message on stderr
+        """
+        msg.alert(self.chart_name, *params)
+
     def debug(self, *params):
         """
         Show debug message on stderr
@@ -345,10 +367,18 @@ class SimpleService(threading.Thread):
         :return: boolean
         """
         self.debug("Module", str(self.__module__), "doesn't implement check() function. Using default.")
-        if self._get_data() is None or len(self._get_data()) == 0:
+        data = self._get_data()
+
+        if data is None:
+            self.debug("failed to receive data during check().")
             return False
-        else:
-            return True
+
+        if len(data) == 0:
+            self.debug("empty data during check().")
+            return False
+
+        self.debug("successfully received data during check(): '" + str(data) + "'")
+        return True
 
     def create(self):
         """
@@ -357,6 +387,7 @@ class SimpleService(threading.Thread):
         """
         data = self._get_data()
         if data is None:
+            self.debug("failed to receive data during create().")
             return False
 
         idx = 0
@@ -380,7 +411,7 @@ class SimpleService(threading.Thread):
         """
         data = self._get_data()
         if data is None:
-            self.debug("_get_data() returned no data")
+            self.debug("failed to receive data during update().")
             return False
 
         updated = False
@@ -458,7 +489,7 @@ class UrlService(SimpleService):
             return None
 
         try:
-            raw = f.read().decode('utf-8')
+            raw = f.read().decode('utf-8', 'ignore')
         except Exception as e:
             self.error(str(e))
         finally:
@@ -506,8 +537,83 @@ class SocketService(SimpleService):
         self.unix_socket = None
         self.request = ""
         self.__socket_config = None
+        self.__empty_request = "".encode()
         SimpleService.__init__(self, configuration=configuration, name=name)
 
+    def _socketerror(self, message=None):
+        if self.unix_socket is not None:
+            self.error("unix socket '" + self.unix_socket + "':", message)
+        else:
+            if self.__socket_config is not None:
+                af, socktype, proto, canonname, sa = self.__socket_config
+                self.error("socket to '" + str(sa[0]) + "' port " + str(sa[1]) + ":", message)
+            else:
+                self.error("unknown socket:", message)
+
+    def _connect2socket(self, res=None):
+        """
+        Connect to a socket, passing the result of getaddrinfo()
+        :return: boolean
+        """
+        if res is None:
+            res = self.__socket_config
+            if res is None:
+                self.error("Cannot create socket to 'None':")
+                return False
+
+        af, socktype, proto, canonname, sa = res
+        try:
+            self.debug("creating socket to '" + str(sa[0]) + "', port " + str(sa[1]))
+            self._sock = socket.socket(af, socktype, proto)
+        except socket.error as e:
+            self.error("Failed to create socket to '" + str(sa[0]) + "', port " + str(sa[1]) + ":", str(e))
+            self._sock = None
+            self.__socket_config = None
+            return False
+
+        try:
+            self.debug("connecting socket to '" + str(sa[0]) + "', port " + str(sa[1]))
+            self._sock.connect(sa)
+        except socket.error as e:
+            self.error("Failed to connect to '" + str(sa[0]) + "', port " + str(sa[1]) + ":", str(e))
+            self._disconnect()
+            self.__socket_config = None
+            return False
+
+        self.debug("connected to '" + str(sa[0]) + "', port " + str(sa[1]))
+        self.__socket_config = res
+        return True
+
+    def _connect2unixsocket(self):
+        """
+        Connect to a unix socket, given its filename
+        :return: boolean
+        """
+        if self.unix_socket is None:
+            self.error("cannot connect to unix socket 'None'")
+            return False
+
+        try:
+            self.debug("attempting DGRAM unix socket '" + str(self.unix_socket) + "'")
+            self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
+            self._sock.connect(self.unix_socket)
+            self.debug("connected DGRAM unix socket '" + str(self.unix_socket) + "'")
+            return True
+        except socket.error as e:
+            self.debug("Failed to connect DGRAM unix socket '" + str(self.unix_socket) + "':", str(e))
+
+        try:
+            self.debug("attempting STREAM unix socket '" + str(self.unix_socket) + "'")
+            self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+            self._sock.connect(self.unix_socket)
+            self.debug("connected STREAM unix socket '" + str(self.unix_socket) + "'")
+            return True
+        except socket.error as e:
+            self.debug("Failed to connect STREAM unix socket '" + str(self.unix_socket) + "':", str(e))
+            self.error("Failed to connect to unix socket '" + str(self.unix_socket) + "':", str(e))
+            self._sock = None
+            return False
+
     def _connect(self):
         """
         Recreate socket and connect to it since sockets cannot be reused after closing
@@ -515,63 +621,38 @@ class SocketService(SimpleService):
         :return:
         """
         try:
-            if self.unix_socket is None:
-                if self.__socket_config is None:
-                    # establish ipv6 or ipv4 connection.
-                    for res in socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM):
-                        try:
-                            # noinspection SpellCheckingInspection
-                            af, socktype, proto, canonname, sa = res
-                            self._sock = socket.socket(af, socktype, proto)
-                        except socket.error as e:
-                            self.debug("Cannot create socket:", str(e))
-                            self._sock = None
-                            continue
-                        try:
-                            self._sock.connect(sa)
-                        except socket.error as e:
-                            self.debug("Cannot connect to socket:", str(e))
-                            self._disconnect()
-                            continue
-                        self.__socket_config = res
-                        break
-                else:
-                    # connect to socket with previously established configuration
-                    try:
-                        af, socktype, proto, canonname, sa = self.__socket_config
-                        self._sock = socket.socket(af, socktype, proto)
-                        self._sock.connect(sa)
-                    except socket.error as e:
-                        self.debug("Cannot create or connect to socket:", str(e))
-                        self._disconnect()
+            if self.unix_socket is not None:
+                self._connect2unixsocket()
+
             else:
-                # connect to unix socket
-                try:
-                    self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
-                    self._sock.connect(self.unix_socket)
-                except socket.error:
-                    self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-                    self._sock.connect(self.unix_socket)
+                if self.__socket_config is not None:
+                    self._connect2socket()
+                else:
+                    for res in socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM):
+                        if self._connect2socket(res): break
 
         except Exception as e:
-            self.error(str(e),
-                       "Cannot create socket with following configuration: host:", str(self.host),
-                       "port:", str(self.port),
-                       "socket:", str(self.unix_socket))
             self._sock = None
-        self._sock.setblocking(0)
+            self.__socket_config = None
+
+        if self._sock is not None:
+            self._sock.setblocking(0)
+            self._sock.settimeout(5)
+            self.debug("set socket timeout to: " + str(self._sock.gettimeout()))
 
     def _disconnect(self):
         """
         Close socket connection
         :return:
         """
-        try:
-            self._sock.shutdown(2)  # 0 - read, 1 - write, 2 - all
-            self._sock.close()
-        except Exception:
-            pass
-        self._sock = None
+        if self._sock is not None:
+            try:
+                self.debug("closing socket")
+                self._sock.shutdown(2)  # 0 - read, 1 - write, 2 - all
+                self._sock.close()
+            except Exception:
+                pass
+            self._sock = None
 
     def _send(self):
         """
@@ -579,15 +660,13 @@ class SocketService(SimpleService):
         :return: boolean
         """
         # Send request if it is needed
-        if self.request != "".encode():
+        if self.request != self.__empty_request:
             try:
+                self.debug("sending request:", str(self.request))
                 self._sock.send(self.request)
             except Exception as e:
+                self._socketerror("error sending request:" + str(e))
                 self._disconnect()
-                self.error(str(e),
-                           "used configuration: host:", str(self.host),
-                           "port:", str(self.port),
-                           "socket:", str(self.unix_socket))
                 return False
         return True
 
@@ -598,24 +677,28 @@ class SocketService(SimpleService):
         """
         data = ""
         while True:
+            self.debug("receiving response")
             try:
-                ready_to_read, _, in_error = select.select([self._sock], [], [], 5)
+                buf = self._sock.recv(4096)
             except Exception as e:
-                self.debug("SELECT", str(e))
+                self._socketerror("failed to receive response:" + str(e))
                 self._disconnect()
                 break
-            if len(ready_to_read) > 0:
-                buf = self._sock.recv(4096)
-                if len(buf) == 0 or buf is None:  # handle server disconnect
-                    break
-                data += buf.decode()
-                if self._check_raw_data(data):
-                    break
-            else:
-                self.error("Socket timed out.")
+
+            if buf is None or len(buf) == 0:  # handle server disconnect
+                if data == "":
+                    self._socketerror("unexpectedly disconnected")
+                else:
+                    self.debug("server closed the connection")
                 self._disconnect()
                 break
 
+            self.debug("received data:", str(buf))
+            data += buf.decode('utf-8', 'ignore')
+            if self._check_raw_data(data):
+                break
+
+        self.debug("final response:", str(data))
         return data
 
     def _get_raw_data(self):
@@ -625,6 +708,8 @@ class SocketService(SimpleService):
         """
         if self._sock is None:
             self._connect()
+            if self._sock is None:
+                return None
 
         # Send request if it is needed
         if not self._send():
@@ -654,6 +739,7 @@ class SocketService(SimpleService):
             self.name = ""
         else:
             self.name = str(self.name)
+
         try:
             self.unix_socket = str(self.configuration['socket'])
         except (KeyError, TypeError):
@@ -667,10 +753,12 @@ class SocketService(SimpleService):
                 self.port = int(self.configuration['port'])
             except (KeyError, TypeError):
                 self.debug("No port specified. Using: '" + str(self.port) + "'")
+
         try:
             self.request = str(self.configuration['request'])
         except (KeyError, TypeError):
             self.debug("No request specified. Using: '" + str(self.request) + "'")
+
         self.request = self.request.encode()
 
     def check(self):
@@ -724,7 +812,7 @@ class LogService(SimpleService):
         try:
             self.log_path = str(self.configuration['path'])
         except (KeyError, TypeError):
-            self.error("No path to log specified. Using: '" + self.log_path + "'")
+            self.info("No path to log specified. Using: '" + self.log_path + "'")
 
         if os.access(self.log_path, os.R_OK):
             return True
@@ -779,22 +867,25 @@ class ExecutableService(SimpleService):
         try:
             self.command = str(self.configuration['command'])
         except (KeyError, TypeError):
-            self.error("No command specified. Using: '" + self.command + "'")
-        command = self.command.split(' ')
+            self.info("No command specified. Using: '" + self.command + "'")
+	# Splitting self.command on every space so subprocess.Popen reads it properly
+        self.command = self.command.split(' ')
 
-        for arg in command[1:]:
+        for arg in self.command[1:]:
             if any(st in arg for st in self.bad_substrings):
                 self.error("Bad command argument:" + " ".join(self.command[1:]))
                 return False
+
         # test command and search for it in /usr/sbin or /sbin when failed
-        base = command[0].split('/')[-1]
+        base = self.command[0].split('/')[-1]
         if self._get_raw_data() is None:
             for prefix in ['/sbin/', '/usr/sbin/']:
-                command[0] = prefix + base
-                if os.path.isfile(command[0]):
+                self.command[0] = prefix + base
+                if os.path.isfile(self.command[0]):
                     break
-        self.command = command
+
         if self._get_data() is None or len(self._get_data()) == 0:
             self.error("Command", self.command, "returned no data")
             return False
+
         return True
diff --git a/python.d/python_modules/msg.py b/python.d/python_modules/msg.py
index ecefba0a..74716770 100644
--- a/python.d/python_modules/msg.py
+++ b/python.d/python_modules/msg.py
@@ -1,14 +1,17 @@
 # -*- coding: utf-8 -*-
 # Description: logging for netdata python.d modules
 
+import traceback
 import sys
 from time import time, strftime
 
 DEBUG_FLAG = False
+TRACE_FLAG = False
 PROGRAM = ""
-LOG_COUNTER = 2
-LOG_INTERVAL = 5
-NEXT_CHECK = 0
+LOG_COUNTER = 0
+LOG_THROTTLE = 10000 # has to be too big during init
+LOG_INTERVAL = 1     # has to be too low during init
+LOG_NEXT_CHECK = 0
 
 WRITE = sys.stderr.write
 FLUSH = sys.stderr.flush
@@ -20,23 +23,39 @@ def log_msg(msg_type, *args):
     :param msg_type: str
     """
     global LOG_COUNTER
-    if not DEBUG_FLAG:
-        LOG_COUNTER -= 1
+    global LOG_THROTTLE
+    global LOG_INTERVAL
+    global LOG_NEXT_CHECK
     now = time()
-    if LOG_COUNTER >= 0:
-        timestamp = strftime('%y-%m-%d %X')
+
+    if not DEBUG_FLAG:
+        LOG_COUNTER += 1
+
+    # WRITE("COUNTER " + str(LOG_COUNTER) + " THROTTLE " + str(LOG_THROTTLE) + " INTERVAL " + str(LOG_INTERVAL) + " NOW " + str(now) + " NEXT " + str(LOG_NEXT_CHECK) + "\n")
+
+    if LOG_COUNTER <= LOG_THROTTLE or msg_type == "FATAL" or msg_type == "ALERT":
+        timestamp = strftime('%Y-%m-%d %X')
         msg = "%s: %s %s: %s" % (timestamp, PROGRAM, str(msg_type), " ".join(args))
         WRITE(msg + "\n")
         FLUSH()
+    elif LOG_COUNTER == LOG_THROTTLE + 1:
+        timestamp = strftime('%Y-%m-%d %X')
+        msg = "%s: python.d.plugin: throttling further log messages for %s seconds" % (timestamp, str(int(LOG_NEXT_CHECK + 0.5) - int(now)))
+        WRITE(msg + "\n")
+        FLUSH()
 
-    global NEXT_CHECK
-    if NEXT_CHECK <= now:
-        NEXT_CHECK = now - (now % LOG_INTERVAL) + LOG_INTERVAL
-        if LOG_COUNTER < 0:
-            timestamp = strftime('%y-%m-%d %X')
-            msg = "%s: Prevented %s log messages from displaying" % (timestamp, str(0 - LOG_COUNTER))
+    if LOG_NEXT_CHECK <= now:
+        if LOG_COUNTER >= LOG_THROTTLE:
+            timestamp = strftime('%Y-%m-%d %X')
+            msg = "%s: python.d.plugin: Prevented %s log messages from displaying" % (timestamp, str(LOG_COUNTER - LOG_THROTTLE))
             WRITE(msg + "\n")
             FLUSH()
+        LOG_NEXT_CHECK = now - (now % LOG_INTERVAL) + LOG_INTERVAL
+        LOG_COUNTER = 0
+
+    if TRACE_FLAG:
+        if msg_type == "FATAL" or msg_type == "ERROR" or msg_type == "ALERT":
+            traceback.print_exc()
 
 
 def debug(*args):
@@ -56,6 +75,13 @@ def error(*args):
     log_msg("ERROR", *args)
 
 
+def alert(*args):
+    """
+    Print message on stderr.
+    """
+    log_msg("ALERT", *args)
+
+
 def info(*args):
     """
     Print message on stderr.
@@ -67,8 +93,9 @@ def fatal(*args):
     """
     Print message on stderr and exit.
     """
-    log_msg("FATAL", *args)
-    # using sys.stdout causes IOError: Broken Pipe
-    print('DISABLE')
-    # sys.stdout.write('DISABLE\n')
-    sys.exit(1)
\ No newline at end of file
+    try:
+        log_msg("FATAL", *args)
+        print('DISABLE')
+    except:
+        pass
+    sys.exit(1)
diff --git a/python.d/python_modules/pyyaml2/__init__.py b/python.d/python_modules/pyyaml2/__init__.py
deleted file mode 100644
index 76e19e13..00000000
--- a/python.d/python_modules/pyyaml2/__init__.py
+++ /dev/null
@@ -1,315 +0,0 @@
-
-from error import *
-
-from tokens import *
-from events import *
-from nodes import *
-
-from loader import *
-from dumper import *
-
-__version__ = '3.11'
-
-try:
-    from cyaml import *
-    __with_libyaml__ = True
-except ImportError:
-    __with_libyaml__ = False
-
-def scan(stream, Loader=Loader):
-    """
-    Scan a YAML stream and produce scanning tokens.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_token():
-            yield loader.get_token()
-    finally:
-        loader.dispose()
-
-def parse(stream, Loader=Loader):
-    """
-    Parse a YAML stream and produce parsing events.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_event():
-            yield loader.get_event()
-    finally:
-        loader.dispose()
-
-def compose(stream, Loader=Loader):
-    """
-    Parse the first YAML document in a stream
-    and produce the corresponding representation tree.
-    """
-    loader = Loader(stream)
-    try:
-        return loader.get_single_node()
-    finally:
-        loader.dispose()
-
-def compose_all(stream, Loader=Loader):
-    """
-    Parse all YAML documents in a stream
-    and produce corresponding representation trees.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_node():
-            yield loader.get_node()
-    finally:
-        loader.dispose()
-
-def load(stream, Loader=Loader):
-    """
-    Parse the first YAML document in a stream
-    and produce the corresponding Python object.
-    """
-    loader = Loader(stream)
-    try:
-        return loader.get_single_data()
-    finally:
-        loader.dispose()
-
-def load_all(stream, Loader=Loader):
-    """
-    Parse all YAML documents in a stream
-    and produce corresponding Python objects.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_data():
-            yield loader.get_data()
-    finally:
-        loader.dispose()
-
-def safe_load(stream):
-    """
-    Parse the first YAML document in a stream
-    and produce the corresponding Python object.
-    Resolve only basic YAML tags.
-    """
-    return load(stream, SafeLoader)
-
-def safe_load_all(stream):
-    """
-    Parse all YAML documents in a stream
-    and produce corresponding Python objects.
-    Resolve only basic YAML tags.
-    """
-    return load_all(stream, SafeLoader)
-
-def emit(events, stream=None, Dumper=Dumper,
-        canonical=None, indent=None, width=None,
-        allow_unicode=None, line_break=None):
-    """
-    Emit YAML parsing events into a stream.
-    If stream is None, return the produced string instead.
-    """
-    getvalue = None
-    if stream is None:
-        from StringIO import StringIO
-        stream = StringIO()
-        getvalue = stream.getvalue
-    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
-            allow_unicode=allow_unicode, line_break=line_break)
-    try:
-        for event in events:
-            dumper.emit(event)
-    finally:
-        dumper.dispose()
-    if getvalue:
-        return getvalue()
-
-def serialize_all(nodes, stream=None, Dumper=Dumper,
-        canonical=None, indent=None, width=None,
-        allow_unicode=None, line_break=None,
-        encoding='utf-8', explicit_start=None, explicit_end=None,
-        version=None, tags=None):
-    """
-    Serialize a sequence of representation trees into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    getvalue = None
-    if stream is None:
-        if encoding is None:
-            from StringIO import StringIO
-        else:
-            from cStringIO import StringIO
-        stream = StringIO()
-        getvalue = stream.getvalue
-    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
-            allow_unicode=allow_unicode, line_break=line_break,
-            encoding=encoding, version=version, tags=tags,
-            explicit_start=explicit_start, explicit_end=explicit_end)
-    try:
-        dumper.open()
-        for node in nodes:
-            dumper.serialize(node)
-        dumper.close()
-    finally:
-        dumper.dispose()
-    if getvalue:
-        return getvalue()
-
-def serialize(node, stream=None, Dumper=Dumper, **kwds):
-    """
-    Serialize a representation tree into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    return serialize_all([node], stream, Dumper=Dumper, **kwds)
-
-def dump_all(documents, stream=None, Dumper=Dumper,
-        default_style=None, default_flow_style=None,
-        canonical=None, indent=None, width=None,
-        allow_unicode=None, line_break=None,
-        encoding='utf-8', explicit_start=None, explicit_end=None,
-        version=None, tags=None):
-    """
-    Serialize a sequence of Python objects into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    getvalue = None
-    if stream is None:
-        if encoding is None:
-            from StringIO import StringIO
-        else:
-            from cStringIO import StringIO
-        stream = StringIO()
-        getvalue = stream.getvalue
-    dumper = Dumper(stream, default_style=default_style,
-            default_flow_style=default_flow_style,
-            canonical=canonical, indent=indent, width=width,
-            allow_unicode=allow_unicode, line_break=line_break,
-            encoding=encoding, version=version, tags=tags,
-            explicit_start=explicit_start, explicit_end=explicit_end)
-    try:
-        dumper.open()
-        for data in documents:
-            dumper.represent(data)
-        dumper.close()
-    finally:
-        dumper.dispose()
-    if getvalue:
-        return getvalue()
-
-def dump(data, stream=None, Dumper=Dumper, **kwds):
-    """
-    Serialize a Python object into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    return dump_all([data], stream, Dumper=Dumper, **kwds)
-
-def safe_dump_all(documents, stream=None, **kwds):
-    """
-    Serialize a sequence of Python objects into a YAML stream.
-    Produce only basic YAML tags.
-    If stream is None, return the produced string instead.
-    """
-    return dump_all(documents, stream, Dumper=SafeDumper, **kwds)
-
-def safe_dump(data, stream=None, **kwds):
-    """
-    Serialize a Python object into a YAML stream.
-    Produce only basic YAML tags.
-    If stream is None, return the produced string instead.
-    """
-    return dump_all([data], stream, Dumper=SafeDumper, **kwds)
-
-def add_implicit_resolver(tag, regexp, first=None,
-        Loader=Loader, Dumper=Dumper):
-    """
-    Add an implicit scalar detector.
-    If an implicit scalar value matches the given regexp,
-    the corresponding tag is assigned to the scalar.
-    first is a sequence of possible initial characters or None.
-    """
-    Loader.add_implicit_resolver(tag, regexp, first)
-    Dumper.add_implicit_resolver(tag, regexp, first)
-
-def add_path_resolver(tag, path, kind=None, Loader=Loader, Dumper=Dumper):
-    """
-    Add a path based resolver for the given tag.
-    A path is a list of keys that forms a path
-    to a node in the representation tree.
-    Keys can be string values, integers, or None.
-    """
-    Loader.add_path_resolver(tag, path, kind)
-    Dumper.add_path_resolver(tag, path, kind)
-
-def add_constructor(tag, constructor, Loader=Loader):
-    """
-    Add a constructor for the given tag.
-    Constructor is a function that accepts a Loader instance
-    and a node object and produces the corresponding Python object.
-    """
-    Loader.add_constructor(tag, constructor)
-
-def add_multi_constructor(tag_prefix, multi_constructor, Loader=Loader):
-    """
-    Add a multi-constructor for the given tag prefix.
-    Multi-constructor is called for a node if its tag starts with tag_prefix.
-    Multi-constructor accepts a Loader instance, a tag suffix,
-    and a node object and produces the corresponding Python object.
-    """
-    Loader.add_multi_constructor(tag_prefix, multi_constructor)
-
-def add_representer(data_type, representer, Dumper=Dumper):
-    """
-    Add a representer for the given type.
-    Representer is a function accepting a Dumper instance
-    and an instance of the given data type
-    and producing the corresponding representation node.
-    """
-    Dumper.add_representer(data_type, representer)
-
-def add_multi_representer(data_type, multi_representer, Dumper=Dumper):
-    """
-    Add a representer for the given type.
-    Multi-representer is a function accepting a Dumper instance
-    and an instance of the given data type or subtype
-    and producing the corresponding representation node.
-    """
-    Dumper.add_multi_representer(data_type, multi_representer)
-
-class YAMLObjectMetaclass(type):
-    """
-    The metaclass for YAMLObject.
-    """
-    def __init__(cls, name, bases, kwds):
-        super(YAMLObjectMetaclass, cls).__init__(name, bases, kwds)
-        if 'yaml_tag' in kwds and kwds['yaml_tag'] is not None:
-            cls.yaml_loader.add_constructor(cls.yaml_tag, cls.from_yaml)
-            cls.yaml_dumper.add_representer(cls, cls.to_yaml)
-
-class YAMLObject(object):
-    """
-    An object that can dump itself to a YAML stream
-    and load itself from a YAML stream.
-    """
-
-    __metaclass__ = YAMLObjectMetaclass
-    __slots__ = ()  # no direct instantiation, so allow immutable subclasses
-
-    yaml_loader = Loader
-    yaml_dumper = Dumper
-
-    yaml_tag = None
-    yaml_flow_style = None
-
-    def from_yaml(cls, loader, node):
-        """
-        Convert a representation node to a Python object.
-        """
-        return loader.construct_yaml_object(node, cls)
-    from_yaml = classmethod(from_yaml)
-
-    def to_yaml(cls, dumper, data):
-        """
-        Convert a Python object to a representation node.
-        """
-        return dumper.represent_yaml_object(cls.yaml_tag, data, cls,
-                flow_style=cls.yaml_flow_style)
-    to_yaml = classmethod(to_yaml)
-
diff --git a/python.d/python_modules/pyyaml2/composer.py b/python.d/python_modules/pyyaml2/composer.py
deleted file mode 100644
index 06e5ac78..00000000
--- a/python.d/python_modules/pyyaml2/composer.py
+++ /dev/null
@@ -1,139 +0,0 @@
-
-__all__ = ['Composer', 'ComposerError']
-
-from error import MarkedYAMLError
-from events import *
-from nodes import *
-
-class ComposerError(MarkedYAMLError):
-    pass
-
-class Composer(object):
-
-    def __init__(self):
-        self.anchors = {}
-
-    def check_node(self):
-        # Drop the STREAM-START event.
-        if self.check_event(StreamStartEvent):
-            self.get_event()
-
-        # If there are more documents available?
-        return not self.check_event(StreamEndEvent)
-
-    def get_node(self):
-        # Get the root node of the next document.
-        if not self.check_event(StreamEndEvent):
-            return self.compose_document()
-
-    def get_single_node(self):
-        # Drop the STREAM-START event.
-        self.get_event()
-
-        # Compose a document if the stream is not empty.
-        document = None
-        if not self.check_event(StreamEndEvent):
-            document = self.compose_document()
-
-        # Ensure that the stream contains no more documents.
-        if not self.check_event(StreamEndEvent):
-            event = self.get_event()
-            raise ComposerError("expected a single document in the stream",
-                    document.start_mark, "but found another document",
-                    event.start_mark)
-
-        # Drop the STREAM-END event.
-        self.get_event()
-
-        return document
-
-    def compose_document(self):
-        # Drop the DOCUMENT-START event.
-        self.get_event()
-
-        # Compose the root node.
-        node = self.compose_node(None, None)
-
-        # Drop the DOCUMENT-END event.
-        self.get_event()
-
-        self.anchors = {}
-        return node
-
-    def compose_node(self, parent, index):
-        if self.check_event(AliasEvent):
-            event = self.get_event()
-            anchor = event.anchor
-            if anchor not in self.anchors:
-                raise ComposerError(None, None, "found undefined alias %r"
-                        % anchor.encode('utf-8'), event.start_mark)
-            return self.anchors[anchor]
-        event = self.peek_event()
-        anchor = event.anchor
-        if anchor is not None:
-            if anchor in self.anchors:
-                raise ComposerError("found duplicate anchor %r; first occurence"
-                        % anchor.encode('utf-8'), self.anchors[anchor].start_mark,
-                        "second occurence", event.start_mark)
-        self.descend_resolver(parent, index)
-        if self.check_event(ScalarEvent):
-            node = self.compose_scalar_node(anchor)
-        elif self.check_event(SequenceStartEvent):
-            node = self.compose_sequence_node(anchor)
-        elif self.check_event(MappingStartEvent):
-            node = self.compose_mapping_node(anchor)
-        self.ascend_resolver()
-        return node
-
-    def compose_scalar_node(self, anchor):
-        event = self.get_event()
-        tag = event.tag
-        if tag is None or tag == u'!':
-            tag = self.resolve(ScalarNode, event.value, event.implicit)
-        node = ScalarNode(tag, event.value,
-                event.start_mark, event.end_mark, style=event.style)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        return node
-
-    def compose_sequence_node(self, anchor):
-        start_event = self.get_event()
-        tag = start_event.tag
-        if tag is None or tag == u'!':
-            tag = self.resolve(SequenceNode, None, start_event.implicit)
-        node = SequenceNode(tag, [],
-                start_event.start_mark, None,
-                flow_style=start_event.flow_style)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        index = 0
-        while not self.check_event(SequenceEndEvent):
-            node.value.append(self.compose_node(node, index))
-            index += 1
-        end_event = self.get_event()
-        node.end_mark = end_event.end_mark
-        return node
-
-    def compose_mapping_node(self, anchor):
-        start_event = self.get_event()
-        tag = start_event.tag
-        if tag is None or tag == u'!':
-            tag = self.resolve(MappingNode, None, start_event.implicit)
-        node = MappingNode(tag, [],
-                start_event.start_mark, None,
-                flow_style=start_event.flow_style)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        while not self.check_event(MappingEndEvent):
-            #key_event = self.peek_event()
-            item_key = self.compose_node(node, None)
-            #if item_key in node.value:
-            #    raise ComposerError("while composing a mapping", start_event.start_mark,
-            #            "found duplicate key", key_event.start_mark)
-            item_value = self.compose_node(node, item_key)
-            #node.value[item_key] = item_value
-            node.value.append((item_key, item_value))
-        end_event = self.get_event()
-        node.end_mark = end_event.end_mark
-        return node
-
diff --git a/python.d/python_modules/pyyaml2/constructor.py b/python.d/python_modules/pyyaml2/constructor.py
deleted file mode 100644
index 635faac3..00000000
--- a/python.d/python_modules/pyyaml2/constructor.py
+++ /dev/null
@@ -1,675 +0,0 @@
-
-__all__ = ['BaseConstructor', 'SafeConstructor', 'Constructor',
-    'ConstructorError']
-
-from error import *
-from nodes import *
-
-import datetime
-
-import binascii, re, sys, types
-
-class ConstructorError(MarkedYAMLError):
-    pass
-
-class BaseConstructor(object):
-
-    yaml_constructors = {}
-    yaml_multi_constructors = {}
-
-    def __init__(self):
-        self.constructed_objects = {}
-        self.recursive_objects = {}
-        self.state_generators = []
-        self.deep_construct = False
-
-    def check_data(self):
-        # If there are more documents available?
-        return self.check_node()
-
-    def get_data(self):
-        # Construct and return the next document.
-        if self.check_node():
-            return self.construct_document(self.get_node())
-
-    def get_single_data(self):
-        # Ensure that the stream contains a single document and construct it.
-        node = self.get_single_node()
-        if node is not None:
-            return self.construct_document(node)
-        return None
-
-    def construct_document(self, node):
-        data = self.construct_object(node)
-        while self.state_generators:
-            state_generators = self.state_generators
-            self.state_generators = []
-            for generator in state_generators:
-                for dummy in generator:
-                    pass
-        self.constructed_objects = {}
-        self.recursive_objects = {}
-        self.deep_construct = False
-        return data
-
-    def construct_object(self, node, deep=False):
-        if node in self.constructed_objects:
-            return self.constructed_objects[node]
-        if deep:
-            old_deep = self.deep_construct
-            self.deep_construct = True
-        if node in self.recursive_objects:
-            raise ConstructorError(None, None,
-                    "found unconstructable recursive node", node.start_mark)
-        self.recursive_objects[node] = None
-        constructor = None
-        tag_suffix = None
-        if node.tag in self.yaml_constructors:
-            constructor = self.yaml_constructors[node.tag]
-        else:
-            for tag_prefix in self.yaml_multi_constructors:
-                if node.tag.startswith(tag_prefix):
-                    tag_suffix = node.tag[len(tag_prefix):]
-                    constructor = self.yaml_multi_constructors[tag_prefix]
-                    break
-            else:
-                if None in self.yaml_multi_constructors:
-                    tag_suffix = node.tag
-                    constructor = self.yaml_multi_constructors[None]
-                elif None in self.yaml_constructors:
-                    constructor = self.yaml_constructors[None]
-                elif isinstance(node, ScalarNode):
-                    constructor = self.__class__.construct_scalar
-                elif isinstance(node, SequenceNode):
-                    constructor = self.__class__.construct_sequence
-                elif isinstance(node, MappingNode):
-                    constructor = self.__class__.construct_mapping
-        if tag_suffix is None:
-            data = constructor(self, node)
-        else:
-            data = constructor(self, tag_suffix, node)
-        if isinstance(data, types.GeneratorType):
-            generator = data
-            data = generator.next()
-            if self.deep_construct:
-                for dummy in generator:
-                    pass
-            else:
-                self.state_generators.append(generator)
-        self.constructed_objects[node] = data
-        del self.recursive_objects[node]
-        if deep:
-            self.deep_construct = old_deep
-        return data
-
-    def construct_scalar(self, node):
-        if not isinstance(node, ScalarNode):
-            raise ConstructorError(None, None,
-                    "expected a scalar node, but found %s" % node.id,
-                    node.start_mark)
-        return node.value
-
-    def construct_sequence(self, node, deep=False):
-        if not isinstance(node, SequenceNode):
-            raise ConstructorError(None, None,
-                    "expected a sequence node, but found %s" % node.id,
-                    node.start_mark)
-        return [self.construct_object(child, deep=deep)
-                for child in node.value]
-
-    def construct_mapping(self, node, deep=False):
-        if not isinstance(node, MappingNode):
-            raise ConstructorError(None, None,
-                    "expected a mapping node, but found %s" % node.id,
-                    node.start_mark)
-        mapping = {}
-        for key_node, value_node in node.value:
-            key = self.construct_object(key_node, deep=deep)
-            try:
-                hash(key)
-            except TypeError, exc:
-                raise ConstructorError("while constructing a mapping", node.start_mark,
-                        "found unacceptable key (%s)" % exc, key_node.start_mark)
-            value = self.construct_object(value_node, deep=deep)
-            mapping[key] = value
-        return mapping
-
-    def construct_pairs(self, node, deep=False):
-        if not isinstance(node, MappingNode):
-            raise ConstructorError(None, None,
-                    "expected a mapping node, but found %s" % node.id,
-                    node.start_mark)
-        pairs = []
-        for key_node, value_node in node.value:
-            key = self.construct_object(key_node, deep=deep)
-            value = self.construct_object(value_node, deep=deep)
-            pairs.append((key, value))
-        return pairs
-
-    def add_constructor(cls, tag, constructor):
-        if not 'yaml_constructors' in cls.__dict__:
-            cls.yaml_constructors = cls.yaml_constructors.copy()
-        cls.yaml_constructors[tag] = constructor
-    add_constructor = classmethod(add_constructor)
-
-    def add_multi_constructor(cls, tag_prefix, multi_constructor):
-        if not 'yaml_multi_constructors' in cls.__dict__:
-            cls.yaml_multi_constructors = cls.yaml_multi_constructors.copy()
-        cls.yaml_multi_constructors[tag_prefix] = multi_constructor
-    add_multi_constructor = classmethod(add_multi_constructor)
-
-class SafeConstructor(BaseConstructor):
-
-    def construct_scalar(self, node):
-        if isinstance(node, MappingNode):
-            for key_node, value_node in node.value:
-                if key_node.tag == u'tag:yaml.org,2002:value':
-                    return self.construct_scalar(value_node)
-        return BaseConstructor.construct_scalar(self, node)
-
-    def flatten_mapping(self, node):
-        merge = []
-        index = 0
-        while index < len(node.value):
-            key_node, value_node = node.value[index]
-            if key_node.tag == u'tag:yaml.org,2002:merge':
-                del node.value[index]
-                if isinstance(value_node, MappingNode):
-                    self.flatten_mapping(value_node)
-                    merge.extend(value_node.value)
-                elif isinstance(value_node, SequenceNode):
-                    submerge = []
-                    for subnode in value_node.value:
-                        if not isinstance(subnode, MappingNode):
-                            raise ConstructorError("while constructing a mapping",
-                                    node.start_mark,
-                                    "expected a mapping for merging, but found %s"
-                                    % subnode.id, subnode.start_mark)
-                        self.flatten_mapping(subnode)
-                        submerge.append(subnode.value)
-                    submerge.reverse()
-                    for value in submerge:
-                        merge.extend(value)
-                else:
-                    raise ConstructorError("while constructing a mapping", node.start_mark,
-                            "expected a mapping or list of mappings for merging, but found %s"
-                            % value_node.id, value_node.start_mark)
-            elif key_node.tag == u'tag:yaml.org,2002:value':
-                key_node.tag = u'tag:yaml.org,2002:str'
-                index += 1
-            else:
-                index += 1
-        if merge:
-            node.value = merge + node.value
-
-    def construct_mapping(self, node, deep=False):
-        if isinstance(node, MappingNode):
-            self.flatten_mapping(node)
-        return BaseConstructor.construct_mapping(self, node, deep=deep)
-
-    def construct_yaml_null(self, node):
-        self.construct_scalar(node)
-        return None
-
-    bool_values = {
-        u'yes':     True,
-        u'no':      False,
-        u'true':    True,
-        u'false':   False,
-        u'on':      True,
-        u'off':     False,
-    }
-
-    def construct_yaml_bool(self, node):
-        value = self.construct_scalar(node)
-        return self.bool_values[value.lower()]
-
-    def construct_yaml_int(self, node):
-        value = str(self.construct_scalar(node))
-        value = value.replace('_', '')
-        sign = +1
-        if value[0] == '-':
-            sign = -1
-        if value[0] in '+-':
-            value = value[1:]
-        if value == '0':
-            return 0
-        elif value.startswith('0b'):
-            return sign*int(value[2:], 2)
-        elif value.startswith('0x'):
-            return sign*int(value[2:], 16)
-        elif value[0] == '0':
-            return sign*int(value, 8)
-        elif ':' in value:
-            digits = [int(part) for part in value.split(':')]
-            digits.reverse()
-            base = 1
-            value = 0
-            for digit in digits:
-                value += digit*base
-                base *= 60
-            return sign*value
-        else:
-            return sign*int(value)
-
-    inf_value = 1e300
-    while inf_value != inf_value*inf_value:
-        inf_value *= inf_value
-    nan_value = -inf_value/inf_value   # Trying to make a quiet NaN (like C99).
-
-    def construct_yaml_float(self, node):
-        value = str(self.construct_scalar(node))
-        value = value.replace('_', '').lower()
-        sign = +1
-        if value[0] == '-':
-            sign = -1
-        if value[0] in '+-':
-            value = value[1:]
-        if value == '.inf':
-            return sign*self.inf_value
-        elif value == '.nan':
-            return self.nan_value
-        elif ':' in value:
-            digits = [float(part) for part in value.split(':')]
-            digits.reverse()
-            base = 1
-            value = 0.0
-            for digit in digits:
-                value += digit*base
-                base *= 60
-            return sign*value
-        else:
-            return sign*float(value)
-
-    def construct_yaml_binary(self, node):
-        value = self.construct_scalar(node)
-        try:
-            return str(value).decode('base64')
-        except (binascii.Error, UnicodeEncodeError), exc:
-            raise ConstructorError(None, None,
-                    "failed to decode base64 data: %s" % exc, node.start_mark) 
-
-    timestamp_regexp = re.compile(
-            ur'''^(?P<year>[0-9][0-9][0-9][0-9])
-                -(?P<month>[0-9][0-9]?)
-                -(?P<day>[0-9][0-9]?)
-                (?:(?:[Tt]|[ \t]+)
-                (?P<hour>[0-9][0-9]?)
-                :(?P<minute>[0-9][0-9])
-                :(?P<second>[0-9][0-9])
-                (?:\.(?P<fraction>[0-9]*))?
-                (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
-                (?::(?P<tz_minute>[0-9][0-9]))?))?)?$''', re.X)
-
-    def construct_yaml_timestamp(self, node):
-        value = self.construct_scalar(node)
-        match = self.timestamp_regexp.match(node.value)
-        values = match.groupdict()
-        year = int(values['year'])
-        month = int(values['month'])
-        day = int(values['day'])
-        if not values['hour']:
-            return datetime.date(year, month, day)
-        hour = int(values['hour'])
-        minute = int(values['minute'])
-        second = int(values['second'])
-        fraction = 0
-        if values['fraction']:
-            fraction = values['fraction'][:6]
-            while len(fraction) < 6:
-                fraction += '0'
-            fraction = int(fraction)
-        delta = None
-        if values['tz_sign']:
-            tz_hour = int(values['tz_hour'])
-            tz_minute = int(values['tz_minute'] or 0)
-            delta = datetime.timedelta(hours=tz_hour, minutes=tz_minute)
-            if values['tz_sign'] == '-':
-                delta = -delta
-        data = datetime.datetime(year, month, day, hour, minute, second, fraction)
-        if delta:
-            data -= delta
-        return data
-
-    def construct_yaml_omap(self, node):
-        # Note: we do not check for duplicate keys, because it's too
-        # CPU-expensive.
-        omap = []
-        yield omap
-        if not isinstance(node, SequenceNode):
-            raise ConstructorError("while constructing an ordered map", node.start_mark,
-                    "expected a sequence, but found %s" % node.id, node.start_mark)
-        for subnode in node.value:
-            if not isinstance(subnode, MappingNode):
-                raise ConstructorError("while constructing an ordered map", node.start_mark,
-                        "expected a mapping of length 1, but found %s" % subnode.id,
-                        subnode.start_mark)
-            if len(subnode.value) != 1:
-                raise ConstructorError("while constructing an ordered map", node.start_mark,
-                        "expected a single mapping item, but found %d items" % len(subnode.value),
-                        subnode.start_mark)
-            key_node, value_node = subnode.value[0]
-            key = self.construct_object(key_node)
-            value = self.construct_object(value_node)
-            omap.append((key, value))
-
-    def construct_yaml_pairs(self, node):
-        # Note: the same code as `construct_yaml_omap`.
-        pairs = []
-        yield pairs
-        if not isinstance(node, SequenceNode):
-            raise ConstructorError("while constructing pairs", node.start_mark,
-                    "expected a sequence, but found %s" % node.id, node.start_mark)
-        for subnode in node.value:
-            if not isinstance(subnode, MappingNode):
-                raise ConstructorError("while constructing pairs", node.start_mark,
-                        "expected a mapping of length 1, but found %s" % subnode.id,
-                        subnode.start_mark)
-            if len(subnode.value) != 1:
-                raise ConstructorError("while constructing pairs", node.start_mark,
-                        "expected a single mapping item, but found %d items" % len(subnode.value),
-                        subnode.start_mark)
-            key_node, value_node = subnode.value[0]
-            key = self.construct_object(key_node)
-            value = self.construct_object(value_node)
-            pairs.append((key, value))
-
-    def construct_yaml_set(self, node):
-        data = set()
-        yield data
-        value = self.construct_mapping(node)
-        data.update(value)
-
-    def construct_yaml_str(self, node):
-        value = self.construct_scalar(node)
-        try:
-            return value.encode('ascii')
-        except UnicodeEncodeError:
-            return value
-
-    def construct_yaml_seq(self, node):
-        data = []
-        yield data
-        data.extend(self.construct_sequence(node))
-
-    def construct_yaml_map(self, node):
-        data = {}
-        yield data
-        value = self.construct_mapping(node)
-        data.update(value)
-
-    def construct_yaml_object(self, node, cls):
-        data = cls.__new__(cls)
-        yield data
-        if hasattr(data, '__setstate__'):
-            state = self.construct_mapping(node, deep=True)
-            data.__setstate__(state)
-        else:
-            state = self.construct_mapping(node)
-            data.__dict__.update(state)
-
-    def construct_undefined(self, node):
-        raise ConstructorError(None, None,
-                "could not determine a constructor for the tag %r" % node.tag.encode('utf-8'),
-                node.start_mark)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:null',
-        SafeConstructor.construct_yaml_null)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:bool',
-        SafeConstructor.construct_yaml_bool)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:int',
-        SafeConstructor.construct_yaml_int)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:float',
-        SafeConstructor.construct_yaml_float)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:binary',
-        SafeConstructor.construct_yaml_binary)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:timestamp',
-        SafeConstructor.construct_yaml_timestamp)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:omap',
-        SafeConstructor.construct_yaml_omap)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:pairs',
-        SafeConstructor.construct_yaml_pairs)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:set',
-        SafeConstructor.construct_yaml_set)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:str',
-        SafeConstructor.construct_yaml_str)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:seq',
-        SafeConstructor.construct_yaml_seq)
-
-SafeConstructor.add_constructor(
-        u'tag:yaml.org,2002:map',
-        SafeConstructor.construct_yaml_map)
-
-SafeConstructor.add_constructor(None,
-        SafeConstructor.construct_undefined)
-
-class Constructor(SafeConstructor):
-
-    def construct_python_str(self, node):
-        return self.construct_scalar(node).encode('utf-8')
-
-    def construct_python_unicode(self, node):
-        return self.construct_scalar(node)
-
-    def construct_python_long(self, node):
-        return long(self.construct_yaml_int(node))
-
-    def construct_python_complex(self, node):
-       return complex(self.construct_scalar(node))
-
-    def construct_python_tuple(self, node):
-        return tuple(self.construct_sequence(node))
-
-    def find_python_module(self, name, mark):
-        if not name:
-            raise ConstructorError("while constructing a Python module", mark,
-                    "expected non-empty name appended to the tag", mark)
-        try:
-            __import__(name)
-        except ImportError, exc:
-            raise ConstructorError("while constructing a Python module", mark,
-                    "cannot find module %r (%s)" % (name.encode('utf-8'), exc), mark)
-        return sys.modules[name]
-
-    def find_python_name(self, name, mark):
-        if not name:
-            raise ConstructorError("while constructing a Python object", mark,
-                    "expected non-empty name appended to the tag", mark)
-        if u'.' in name:
-            module_name, object_name = name.rsplit('.', 1)
-        else:
-            module_name = '__builtin__'
-            object_name = name
-        try:
-            __import__(module_name)
-        except ImportError, exc:
-            raise ConstructorError("while constructing a Python object", mark,
-                    "cannot find module %r (%s)" % (module_name.encode('utf-8'), exc), mark)
-        module = sys.modules[module_name]
-        if not hasattr(module, object_name):
-            raise ConstructorError("while constructing a Python object", mark,
-                    "cannot find %r in the module %r" % (object_name.encode('utf-8'),
-                        module.__name__), mark)
-        return getattr(module, object_name)
-
-    def construct_python_name(self, suffix, node):
-        value = self.construct_scalar(node)
-        if value:
-            raise ConstructorError("while constructing a Python name", node.start_mark,
-                    "expected the empty value, but found %r" % value.encode('utf-8'),
-                    node.start_mark)
-        return self.find_python_name(suffix, node.start_mark)
-
-    def construct_python_module(self, suffix, node):
-        value = self.construct_scalar(node)
-        if value:
-            raise ConstructorError("while constructing a Python module", node.start_mark,
-                    "expected the empty value, but found %r" % value.encode('utf-8'),
-                    node.start_mark)
-        return self.find_python_module(suffix, node.start_mark)
-
-    class classobj: pass
-
-    def make_python_instance(self, suffix, node,
-            args=None, kwds=None, newobj=False):
-        if not args:
-            args = []
-        if not kwds:
-            kwds = {}
-        cls = self.find_python_name(suffix, node.start_mark)
-        if newobj and isinstance(cls, type(self.classobj))  \
-                and not args and not kwds:
-            instance = self.classobj()
-            instance.__class__ = cls
-            return instance
-        elif newobj and isinstance(cls, type):
-            return cls.__new__(cls, *args, **kwds)
-        else:
-            return cls(*args, **kwds)
-
-    def set_python_instance_state(self, instance, state):
-        if hasattr(instance, '__setstate__'):
-            instance.__setstate__(state)
-        else:
-            slotstate = {}
-            if isinstance(state, tuple) and len(state) == 2:
-                state, slotstate = state
-            if hasattr(instance, '__dict__'):
-                instance.__dict__.update(state)
-            elif state:
-                slotstate.update(state)
-            for key, value in slotstate.items():
-                setattr(object, key, value)
-
-    def construct_python_object(self, suffix, node):
-        # Format:
-        #   !!python/object:module.name { ... state ... }
-        instance = self.make_python_instance(suffix, node, newobj=True)
-        yield instance
-        deep = hasattr(instance, '__setstate__')
-        state = self.construct_mapping(node, deep=deep)
-        self.set_python_instance_state(instance, state)
-
-    def construct_python_object_apply(self, suffix, node, newobj=False):
-        # Format:
-        #   !!python/object/apply       # (or !!python/object/new)
-        #   args: [ ... arguments ... ]
-        #   kwds: { ... keywords ... }
-        #   state: ... state ...
-        #   listitems: [ ... listitems ... ]
-        #   dictitems: { ... dictitems ... }
-        # or short format:
-        #   !!python/object/apply [ ... arguments ... ]
-        # The difference between !!python/object/apply and !!python/object/new
-        # is how an object is created, check make_python_instance for details.
-        if isinstance(node, SequenceNode):
-            args = self.construct_sequence(node, deep=True)
-            kwds = {}
-            state = {}
-            listitems = []
-            dictitems = {}
-        else:
-            value = self.construct_mapping(node, deep=True)
-            args = value.get('args', [])
-            kwds = value.get('kwds', {})
-            state = value.get('state', {})
-            listitems = value.get('listitems', [])
-            dictitems = value.get('dictitems', {})
-        instance = self.make_python_instance(suffix, node, args, kwds, newobj)
-        if state:
-            self.set_python_instance_state(instance, state)
-        if listitems:
-            instance.extend(listitems)
-        if dictitems:
-            for key in dictitems:
-                instance[key] = dictitems[key]
-        return instance
-
-    def construct_python_object_new(self, suffix, node):
-        return self.construct_python_object_apply(suffix, node, newobj=True)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/none',
-    Constructor.construct_yaml_null)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/bool',
-    Constructor.construct_yaml_bool)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/str',
-    Constructor.construct_python_str)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/unicode',
-    Constructor.construct_python_unicode)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/int',
-    Constructor.construct_yaml_int)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/long',
-    Constructor.construct_python_long)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/float',
-    Constructor.construct_yaml_float)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/complex',
-    Constructor.construct_python_complex)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/list',
-    Constructor.construct_yaml_seq)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/tuple',
-    Constructor.construct_python_tuple)
-
-Constructor.add_constructor(
-    u'tag:yaml.org,2002:python/dict',
-    Constructor.construct_yaml_map)
-
-Constructor.add_multi_constructor(
-    u'tag:yaml.org,2002:python/name:',
-    Constructor.construct_python_name)
-
-Constructor.add_multi_constructor(
-    u'tag:yaml.org,2002:python/module:',
-    Constructor.construct_python_module)
-
-Constructor.add_multi_constructor(
-    u'tag:yaml.org,2002:python/object:',
-    Constructor.construct_python_object)
-
-Constructor.add_multi_constructor(
-    u'tag:yaml.org,2002:python/object/apply:',
-    Constructor.construct_python_object_apply)
-
-Constructor.add_multi_constructor(
-    u'tag:yaml.org,2002:python/object/new:',
-    Constructor.construct_python_object_new)
-
diff --git a/python.d/python_modules/pyyaml2/cyaml.py b/python.d/python_modules/pyyaml2/cyaml.py
deleted file mode 100644
index 68dcd751..00000000
--- a/python.d/python_modules/pyyaml2/cyaml.py
+++ /dev/null
@@ -1,85 +0,0 @@
-
-__all__ = ['CBaseLoader', 'CSafeLoader', 'CLoader',
-        'CBaseDumper', 'CSafeDumper', 'CDumper']
-
-from _yaml import CParser, CEmitter
-
-from constructor import *
-
-from serializer import *
-from representer import *
-
-from resolver import *
-
-class CBaseLoader(CParser, BaseConstructor, BaseResolver):
-
-    def __init__(self, stream):
-        CParser.__init__(self, stream)
-        BaseConstructor.__init__(self)
-        BaseResolver.__init__(self)
-
-class CSafeLoader(CParser, SafeConstructor, Resolver):
-
-    def __init__(self, stream):
-        CParser.__init__(self, stream)
-        SafeConstructor.__init__(self)
-        Resolver.__init__(self)
-
-class CLoader(CParser, Constructor, Resolver):
-
-    def __init__(self, stream):
-        CParser.__init__(self, stream)
-        Constructor.__init__(self)
-        Resolver.__init__(self)
-
-class CBaseDumper(CEmitter, BaseRepresenter, BaseResolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        CEmitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width, encoding=encoding,
-                allow_unicode=allow_unicode, line_break=line_break,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class CSafeDumper(CEmitter, SafeRepresenter, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        CEmitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width, encoding=encoding,
-                allow_unicode=allow_unicode, line_break=line_break,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        SafeRepresenter.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class CDumper(CEmitter, Serializer, Representer, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        CEmitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width, encoding=encoding,
-                allow_unicode=allow_unicode, line_break=line_break,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
diff --git a/python.d/python_modules/pyyaml2/dumper.py b/python.d/python_modules/pyyaml2/dumper.py
deleted file mode 100644
index f811d2c9..00000000
--- a/python.d/python_modules/pyyaml2/dumper.py
+++ /dev/null
@@ -1,62 +0,0 @@
-
-__all__ = ['BaseDumper', 'SafeDumper', 'Dumper']
-
-from emitter import *
-from serializer import *
-from representer import *
-from resolver import *
-
-class BaseDumper(Emitter, Serializer, BaseRepresenter, BaseResolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        Emitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width,
-                allow_unicode=allow_unicode, line_break=line_break)
-        Serializer.__init__(self, encoding=encoding,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class SafeDumper(Emitter, Serializer, SafeRepresenter, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        Emitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width,
-                allow_unicode=allow_unicode, line_break=line_break)
-        Serializer.__init__(self, encoding=encoding,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        SafeRepresenter.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class Dumper(Emitter, Serializer, Representer, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        Emitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width,
-                allow_unicode=allow_unicode, line_break=line_break)
-        Serializer.__init__(self, encoding=encoding,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
diff --git a/python.d/python_modules/pyyaml2/emitter.py b/python.d/python_modules/pyyaml2/emitter.py
deleted file mode 100644
index e5bcdccc..00000000
--- a/python.d/python_modules/pyyaml2/emitter.py
+++ /dev/null
@@ -1,1140 +0,0 @@
-
-# Emitter expects events obeying the following grammar:
-# stream ::= STREAM-START document* STREAM-END
-# document ::= DOCUMENT-START node DOCUMENT-END
-# node ::= SCALAR | sequence | mapping
-# sequence ::= SEQUENCE-START node* SEQUENCE-END
-# mapping ::= MAPPING-START (node node)* MAPPING-END
-
-__all__ = ['Emitter', 'EmitterError']
-
-from error import YAMLError
-from events import *
-
-class EmitterError(YAMLError):
-    pass
-
-class ScalarAnalysis(object):
-    def __init__(self, scalar, empty, multiline,
-            allow_flow_plain, allow_block_plain,
-            allow_single_quoted, allow_double_quoted,
-            allow_block):
-        self.scalar = scalar
-        self.empty = empty
-        self.multiline = multiline
-        self.allow_flow_plain = allow_flow_plain
-        self.allow_block_plain = allow_block_plain
-        self.allow_single_quoted = allow_single_quoted
-        self.allow_double_quoted = allow_double_quoted
-        self.allow_block = allow_block
-
-class Emitter(object):
-
-    DEFAULT_TAG_PREFIXES = {
-        u'!' : u'!',
-        u'tag:yaml.org,2002:' : u'!!',
-    }
-
-    def __init__(self, stream, canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None):
-
-        # The stream should have the methods `write` and possibly `flush`.
-        self.stream = stream
-
-        # Encoding can be overriden by STREAM-START.
-        self.encoding = None
-
-        # Emitter is a state machine with a stack of states to handle nested
-        # structures.
-        self.states = []
-        self.state = self.expect_stream_start
-
-        # Current event and the event queue.
-        self.events = []
-        self.event = None
-
-        # The current indentation level and the stack of previous indents.
-        self.indents = []
-        self.indent = None
-
-        # Flow level.
-        self.flow_level = 0
-
-        # Contexts.
-        self.root_context = False
-        self.sequence_context = False
-        self.mapping_context = False
-        self.simple_key_context = False
-
-        # Characteristics of the last emitted character:
-        #  - current position.
-        #  - is it a whitespace?
-        #  - is it an indention character
-        #    (indentation space, '-', '?', or ':')?
-        self.line = 0
-        self.column = 0
-        self.whitespace = True
-        self.indention = True
-
-        # Whether the document requires an explicit document indicator
-        self.open_ended = False
-
-        # Formatting details.
-        self.canonical = canonical
-        self.allow_unicode = allow_unicode
-        self.best_indent = 2
-        if indent and 1 < indent < 10:
-            self.best_indent = indent
-        self.best_width = 80
-        if width and width > self.best_indent*2:
-            self.best_width = width
-        self.best_line_break = u'\n'
-        if line_break in [u'\r', u'\n', u'\r\n']:
-            self.best_line_break = line_break
-
-        # Tag prefixes.
-        self.tag_prefixes = None
-
-        # Prepared anchor and tag.
-        self.prepared_anchor = None
-        self.prepared_tag = None
-
-        # Scalar analysis and style.
-        self.analysis = None
-        self.style = None
-
-    def dispose(self):
-        # Reset the state attributes (to clear self-references)
-        self.states = []
-        self.state = None
-
-    def emit(self, event):
-        self.events.append(event)
-        while not self.need_more_events():
-            self.event = self.events.pop(0)
-            self.state()
-            self.event = None
-
-    # In some cases, we wait for a few next events before emitting.
-
-    def need_more_events(self):
-        if not self.events:
-            return True
-        event = self.events[0]
-        if isinstance(event, DocumentStartEvent):
-            return self.need_events(1)
-        elif isinstance(event, SequenceStartEvent):
-            return self.need_events(2)
-        elif isinstance(event, MappingStartEvent):
-            return self.need_events(3)
-        else:
-            return False
-
-    def need_events(self, count):
-        level = 0
-        for event in self.events[1:]:
-            if isinstance(event, (DocumentStartEvent, CollectionStartEvent)):
-                level += 1
-            elif isinstance(event, (DocumentEndEvent, CollectionEndEvent)):
-                level -= 1
-            elif isinstance(event, StreamEndEvent):
-                level = -1
-            if level < 0:
-                return False
-        return (len(self.events) < count+1)
-
-    def increase_indent(self, flow=False, indentless=False):
-        self.indents.append(self.indent)
-        if self.indent is None:
-            if flow:
-                self.indent = self.best_indent
-            else:
-                self.indent = 0
-        elif not indentless:
-            self.indent += self.best_indent
-
-    # States.
-
-    # Stream handlers.
-
-    def expect_stream_start(self):
-        if isinstance(self.event, StreamStartEvent):
-            if self.event.encoding and not getattr(self.stream, 'encoding', None):
-                self.encoding = self.event.encoding
-            self.write_stream_start()
-            self.state = self.expect_first_document_start
-        else:
-            raise EmitterError("expected StreamStartEvent, but got %s"
-                    % self.event)
-
-    def expect_nothing(self):
-        raise EmitterError("expected nothing, but got %s" % self.event)
-
-    # Document handlers.
-
-    def expect_first_document_start(self):
-        return self.expect_document_start(first=True)
-
-    def expect_document_start(self, first=False):
-        if isinstance(self.event, DocumentStartEvent):
-            if (self.event.version or self.event.tags) and self.open_ended:
-                self.write_indicator(u'...', True)
-                self.write_indent()
-            if self.event.version:
-                version_text = self.prepare_version(self.event.version)
-                self.write_version_directive(version_text)
-            self.tag_prefixes = self.DEFAULT_TAG_PREFIXES.copy()
-            if self.event.tags:
-                handles = self.event.tags.keys()
-                handles.sort()
-                for handle in handles:
-                    prefix = self.event.tags[handle]
-                    self.tag_prefixes[prefix] = handle
-                    handle_text = self.prepare_tag_handle(handle)
-                    prefix_text = self.prepare_tag_prefix(prefix)
-                    self.write_tag_directive(handle_text, prefix_text)
-            implicit = (first and not self.event.explicit and not self.canonical
-                    and not self.event.version and not self.event.tags
-                    and not self.check_empty_document())
-            if not implicit:
-                self.write_indent()
-                self.write_indicator(u'---', True)
-                if self.canonical:
-                    self.write_indent()
-            self.state = self.expect_document_root
-        elif isinstance(self.event, StreamEndEvent):
-            if self.open_ended:
-                self.write_indicator(u'...', True)
-                self.write_indent()
-            self.write_stream_end()
-            self.state = self.expect_nothing
-        else:
-            raise EmitterError("expected DocumentStartEvent, but got %s"
-                    % self.event)
-
-    def expect_document_end(self):
-        if isinstance(self.event, DocumentEndEvent):
-            self.write_indent()
-            if self.event.explicit:
-                self.write_indicator(u'...', True)
-                self.write_indent()
-            self.flush_stream()
-            self.state = self.expect_document_start
-        else:
-            raise EmitterError("expected DocumentEndEvent, but got %s"
-                    % self.event)
-
-    def expect_document_root(self):
-        self.states.append(self.expect_document_end)
-        self.expect_node(root=True)
-
-    # Node handlers.
-
-    def expect_node(self, root=False, sequence=False, mapping=False,
-            simple_key=False):
-        self.root_context = root
-        self.sequence_context = sequence
-        self.mapping_context = mapping
-        self.simple_key_context = simple_key
-        if isinstance(self.event, AliasEvent):
-            self.expect_alias()
-        elif isinstance(self.event, (ScalarEvent, CollectionStartEvent)):
-            self.process_anchor(u'&')
-            self.process_tag()
-            if isinstance(self.event, ScalarEvent):
-                self.expect_scalar()
-            elif isinstance(self.event, SequenceStartEvent):
-                if self.flow_level or self.canonical or self.event.flow_style   \
-                        or self.check_empty_sequence():
-                    self.expect_flow_sequence()
-                else:
-                    self.expect_block_sequence()
-            elif isinstance(self.event, MappingStartEvent):
-                if self.flow_level or self.canonical or self.event.flow_style   \
-                        or self.check_empty_mapping():
-                    self.expect_flow_mapping()
-                else:
-                    self.expect_block_mapping()
-        else:
-            raise EmitterError("expected NodeEvent, but got %s" % self.event)
-
-    def expect_alias(self):
-        if self.event.anchor is None:
-            raise EmitterError("anchor is not specified for alias")
-        self.process_anchor(u'*')
-        self.state = self.states.pop()
-
-    def expect_scalar(self):
-        self.increase_indent(flow=True)
-        self.process_scalar()
-        self.indent = self.indents.pop()
-        self.state = self.states.pop()
-
-    # Flow sequence handlers.
-
-    def expect_flow_sequence(self):
-        self.write_indicator(u'[', True, whitespace=True)
-        self.flow_level += 1
-        self.increase_indent(flow=True)
-        self.state = self.expect_first_flow_sequence_item
-
-    def expect_first_flow_sequence_item(self):
-        if isinstance(self.event, SequenceEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            self.write_indicator(u']', False)
-            self.state = self.states.pop()
-        else:
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            self.states.append(self.expect_flow_sequence_item)
-            self.expect_node(sequence=True)
-
-    def expect_flow_sequence_item(self):
-        if isinstance(self.event, SequenceEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            if self.canonical:
-                self.write_indicator(u',', False)
-                self.write_indent()
-            self.write_indicator(u']', False)
-            self.state = self.states.pop()
-        else:
-            self.write_indicator(u',', False)
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            self.states.append(self.expect_flow_sequence_item)
-            self.expect_node(sequence=True)
-
-    # Flow mapping handlers.
-
-    def expect_flow_mapping(self):
-        self.write_indicator(u'{', True, whitespace=True)
-        self.flow_level += 1
-        self.increase_indent(flow=True)
-        self.state = self.expect_first_flow_mapping_key
-
-    def expect_first_flow_mapping_key(self):
-        if isinstance(self.event, MappingEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            self.write_indicator(u'}', False)
-            self.state = self.states.pop()
-        else:
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            if not self.canonical and self.check_simple_key():
-                self.states.append(self.expect_flow_mapping_simple_value)
-                self.expect_node(mapping=True, simple_key=True)
-            else:
-                self.write_indicator(u'?', True)
-                self.states.append(self.expect_flow_mapping_value)
-                self.expect_node(mapping=True)
-
-    def expect_flow_mapping_key(self):
-        if isinstance(self.event, MappingEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            if self.canonical:
-                self.write_indicator(u',', False)
-                self.write_indent()
-            self.write_indicator(u'}', False)
-            self.state = self.states.pop()
-        else:
-            self.write_indicator(u',', False)
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            if not self.canonical and self.check_simple_key():
-                self.states.append(self.expect_flow_mapping_simple_value)
-                self.expect_node(mapping=True, simple_key=True)
-            else:
-                self.write_indicator(u'?', True)
-                self.states.append(self.expect_flow_mapping_value)
-                self.expect_node(mapping=True)
-
-    def expect_flow_mapping_simple_value(self):
-        self.write_indicator(u':', False)
-        self.states.append(self.expect_flow_mapping_key)
-        self.expect_node(mapping=True)
-
-    def expect_flow_mapping_value(self):
-        if self.canonical or self.column > self.best_width:
-            self.write_indent()
-        self.write_indicator(u':', True)
-        self.states.append(self.expect_flow_mapping_key)
-        self.expect_node(mapping=True)
-
-    # Block sequence handlers.
-
-    def expect_block_sequence(self):
-        indentless = (self.mapping_context and not self.indention)
-        self.increase_indent(flow=False, indentless=indentless)
-        self.state = self.expect_first_block_sequence_item
-
-    def expect_first_block_sequence_item(self):
-        return self.expect_block_sequence_item(first=True)
-
-    def expect_block_sequence_item(self, first=False):
-        if not first and isinstance(self.event, SequenceEndEvent):
-            self.indent = self.indents.pop()
-            self.state = self.states.pop()
-        else:
-            self.write_indent()
-            self.write_indicator(u'-', True, indention=True)
-            self.states.append(self.expect_block_sequence_item)
-            self.expect_node(sequence=True)
-
-    # Block mapping handlers.
-
-    def expect_block_mapping(self):
-        self.increase_indent(flow=False)
-        self.state = self.expect_first_block_mapping_key
-
-    def expect_first_block_mapping_key(self):
-        return self.expect_block_mapping_key(first=True)
-
-    def expect_block_mapping_key(self, first=False):
-        if not first and isinstance(self.event, MappingEndEvent):
-            self.indent = self.indents.pop()
-            self.state = self.states.pop()
-        else:
-            self.write_indent()
-            if self.check_simple_key():
-                self.states.append(self.expect_block_mapping_simple_value)
-                self.expect_node(mapping=True, simple_key=True)
-            else:
-                self.write_indicator(u'?', True, indention=True)
-                self.states.append(self.expect_block_mapping_value)
-                self.expect_node(mapping=True)
-
-    def expect_block_mapping_simple_value(self):
-        self.write_indicator(u':', False)
-        self.states.append(self.expect_block_mapping_key)
-        self.expect_node(mapping=True)
-
-    def expect_block_mapping_value(self):
-        self.write_indent()
-        self.write_indicator(u':', True, indention=True)
-        self.states.append(self.expect_block_mapping_key)
-        self.expect_node(mapping=True)
-
-    # Checkers.
-
-    def check_empty_sequence(self):
-        return (isinstance(self.event, SequenceStartEvent) and self.events
-                and isinstance(self.events[0], SequenceEndEvent))
-
-    def check_empty_mapping(self):
-        return (isinstance(self.event, MappingStartEvent) and self.events
-                and isinstance(self.events[0], MappingEndEvent))
-
-    def check_empty_document(self):
-        if not isinstance(self.event, DocumentStartEvent) or not self.events:
-            return False
-        event = self.events[0]
-        return (isinstance(event, ScalarEvent) and event.anchor is None
-                and event.tag is None and event.implicit and event.value == u'')
-
-    def check_simple_key(self):
-        length = 0
-        if isinstance(self.event, NodeEvent) and self.event.anchor is not None:
-            if self.prepared_anchor is None:
-                self.prepared_anchor = self.prepare_anchor(self.event.anchor)
-            length += len(self.prepared_anchor)
-        if isinstance(self.event, (ScalarEvent, CollectionStartEvent))  \
-                and self.event.tag is not None:
-            if self.prepared_tag is None:
-                self.prepared_tag = self.prepare_tag(self.event.tag)
-            length += len(self.prepared_tag)
-        if isinstance(self.event, ScalarEvent):
-            if self.analysis is None:
-                self.analysis = self.analyze_scalar(self.event.value)
-            length += len(self.analysis.scalar)
-        return (length < 128 and (isinstance(self.event, AliasEvent)
-            or (isinstance(self.event, ScalarEvent)
-                    and not self.analysis.empty and not self.analysis.multiline)
-            or self.check_empty_sequence() or self.check_empty_mapping()))
-
-    # Anchor, Tag, and Scalar processors.
-
-    def process_anchor(self, indicator):
-        if self.event.anchor is None:
-            self.prepared_anchor = None
-            return
-        if self.prepared_anchor is None:
-            self.prepared_anchor = self.prepare_anchor(self.event.anchor)
-        if self.prepared_anchor:
-            self.write_indicator(indicator+self.prepared_anchor, True)
-        self.prepared_anchor = None
-
-    def process_tag(self):
-        tag = self.event.tag
-        if isinstance(self.event, ScalarEvent):
-            if self.style is None:
-                self.style = self.choose_scalar_style()
-            if ((not self.canonical or tag is None) and
-                ((self.style == '' and self.event.implicit[0])
-                        or (self.style != '' and self.event.implicit[1]))):
-                self.prepared_tag = None
-                return
-            if self.event.implicit[0] and tag is None:
-                tag = u'!'
-                self.prepared_tag = None
-        else:
-            if (not self.canonical or tag is None) and self.event.implicit:
-                self.prepared_tag = None
-                return
-        if tag is None:
-            raise EmitterError("tag is not specified")
-        if self.prepared_tag is None:
-            self.prepared_tag = self.prepare_tag(tag)
-        if self.prepared_tag:
-            self.write_indicator(self.prepared_tag, True)
-        self.prepared_tag = None
-
-    def choose_scalar_style(self):
-        if self.analysis is None:
-            self.analysis = self.analyze_scalar(self.event.value)
-        if self.event.style == '"' or self.canonical:
-            return '"'
-        if not self.event.style and self.event.implicit[0]:
-            if (not (self.simple_key_context and
-                    (self.analysis.empty or self.analysis.multiline))
-                and (self.flow_level and self.analysis.allow_flow_plain
-                    or (not self.flow_level and self.analysis.allow_block_plain))):
-                return ''
-        if self.event.style and self.event.style in '|>':
-            if (not self.flow_level and not self.simple_key_context
-                    and self.analysis.allow_block):
-                return self.event.style
-        if not self.event.style or self.event.style == '\'':
-            if (self.analysis.allow_single_quoted and
-                    not (self.simple_key_context and self.analysis.multiline)):
-                return '\''
-        return '"'
-
-    def process_scalar(self):
-        if self.analysis is None:
-            self.analysis = self.analyze_scalar(self.event.value)
-        if self.style is None:
-            self.style = self.choose_scalar_style()
-        split = (not self.simple_key_context)
-        #if self.analysis.multiline and split    \
-        #        and (not self.style or self.style in '\'\"'):
-        #    self.write_indent()
-        if self.style == '"':
-            self.write_double_quoted(self.analysis.scalar, split)
-        elif self.style == '\'':
-            self.write_single_quoted(self.analysis.scalar, split)
-        elif self.style == '>':
-            self.write_folded(self.analysis.scalar)
-        elif self.style == '|':
-            self.write_literal(self.analysis.scalar)
-        else:
-            self.write_plain(self.analysis.scalar, split)
-        self.analysis = None
-        self.style = None
-
-    # Analyzers.
-
-    def prepare_version(self, version):
-        major, minor = version
-        if major != 1:
-            raise EmitterError("unsupported YAML version: %d.%d" % (major, minor))
-        return u'%d.%d' % (major, minor)
-
-    def prepare_tag_handle(self, handle):
-        if not handle:
-            raise EmitterError("tag handle must not be empty")
-        if handle[0] != u'!' or handle[-1] != u'!':
-            raise EmitterError("tag handle must start and end with '!': %r"
-                    % (handle.encode('utf-8')))
-        for ch in handle[1:-1]:
-            if not (u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'  \
-                    or ch in u'-_'):
-                raise EmitterError("invalid character %r in the tag handle: %r"
-                        % (ch.encode('utf-8'), handle.encode('utf-8')))
-        return handle
-
-    def prepare_tag_prefix(self, prefix):
-        if not prefix:
-            raise EmitterError("tag prefix must not be empty")
-        chunks = []
-        start = end = 0
-        if prefix[0] == u'!':
-            end = 1
-        while end < len(prefix):
-            ch = prefix[end]
-            if u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'   \
-                    or ch in u'-;/?!:@&=+$,_.~*\'()[]':
-                end += 1
-            else:
-                if start < end:
-                    chunks.append(prefix[start:end])
-                start = end = end+1
-                data = ch.encode('utf-8')
-                for ch in data:
-                    chunks.append(u'%%%02X' % ord(ch))
-        if start < end:
-            chunks.append(prefix[start:end])
-        return u''.join(chunks)
-
-    def prepare_tag(self, tag):
-        if not tag:
-            raise EmitterError("tag must not be empty")
-        if tag == u'!':
-            return tag
-        handle = None
-        suffix = tag
-        prefixes = self.tag_prefixes.keys()
-        prefixes.sort()
-        for prefix in prefixes:
-            if tag.startswith(prefix)   \
-                    and (prefix == u'!' or len(prefix) < len(tag)):
-                handle = self.tag_prefixes[prefix]
-                suffix = tag[len(prefix):]
-        chunks = []
-        start = end = 0
-        while end < len(suffix):
-            ch = suffix[end]
-            if u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'   \
-                    or ch in u'-;/?:@&=+$,_.~*\'()[]'   \
-                    or (ch == u'!' and handle != u'!'):
-                end += 1
-            else:
-                if start < end:
-                    chunks.append(suffix[start:end])
-                start = end = end+1
-                data = ch.encode('utf-8')
-                for ch in data:
-                    chunks.append(u'%%%02X' % ord(ch))
-        if start < end:
-            chunks.append(suffix[start:end])
-        suffix_text = u''.join(chunks)
-        if handle:
-            return u'%s%s' % (handle, suffix_text)
-        else:
-            return u'!<%s>' % suffix_text
-
-    def prepare_anchor(self, anchor):
-        if not anchor:
-            raise EmitterError("anchor must not be empty")
-        for ch in anchor:
-            if not (u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'  \
-                    or ch in u'-_'):
-                raise EmitterError("invalid character %r in the anchor: %r"
-                        % (ch.encode('utf-8'), anchor.encode('utf-8')))
-        return anchor
-
-    def analyze_scalar(self, scalar):
-
-        # Empty scalar is a special case.
-        if not scalar:
-            return ScalarAnalysis(scalar=scalar, empty=True, multiline=False,
-                    allow_flow_plain=False, allow_block_plain=True,
-                    allow_single_quoted=True, allow_double_quoted=True,
-                    allow_block=False)
-
-        # Indicators and special characters.
-        block_indicators = False
-        flow_indicators = False
-        line_breaks = False
-        special_characters = False
-
-        # Important whitespace combinations.
-        leading_space = False
-        leading_break = False
-        trailing_space = False
-        trailing_break = False
-        break_space = False
-        space_break = False
-
-        # Check document indicators.
-        if scalar.startswith(u'---') or scalar.startswith(u'...'):
-            block_indicators = True
-            flow_indicators = True
-
-        # First character or preceded by a whitespace.
-        preceeded_by_whitespace = True
-
-        # Last character or followed by a whitespace.
-        followed_by_whitespace = (len(scalar) == 1 or
-                scalar[1] in u'\0 \t\r\n\x85\u2028\u2029')
-
-        # The previous character is a space.
-        previous_space = False
-
-        # The previous character is a break.
-        previous_break = False
-
-        index = 0
-        while index < len(scalar):
-            ch = scalar[index]
-
-            # Check for indicators.
-            if index == 0:
-                # Leading indicators are special characters.
-                if ch in u'#,[]{}&*!|>\'\"%@`': 
-                    flow_indicators = True
-                    block_indicators = True
-                if ch in u'?:':
-                    flow_indicators = True
-                    if followed_by_whitespace:
-                        block_indicators = True
-                if ch == u'-' and followed_by_whitespace:
-                    flow_indicators = True
-                    block_indicators = True
-            else:
-                # Some indicators cannot appear within a scalar as well.
-                if ch in u',?[]{}':
-                    flow_indicators = True
-                if ch == u':':
-                    flow_indicators = True
-                    if followed_by_whitespace:
-                        block_indicators = True
-                if ch == u'#' and preceeded_by_whitespace:
-                    flow_indicators = True
-                    block_indicators = True
-
-            # Check for line breaks, special, and unicode characters.
-            if ch in u'\n\x85\u2028\u2029':
-                line_breaks = True
-            if not (ch == u'\n' or u'\x20' <= ch <= u'\x7E'):
-                if (ch == u'\x85' or u'\xA0' <= ch <= u'\uD7FF'
-                        or u'\uE000' <= ch <= u'\uFFFD') and ch != u'\uFEFF':
-                    unicode_characters = True
-                    if not self.allow_unicode:
-                        special_characters = True
-                else:
-                    special_characters = True
-
-            # Detect important whitespace combinations.
-            if ch == u' ':
-                if index == 0:
-                    leading_space = True
-                if index == len(scalar)-1:
-                    trailing_space = True
-                if previous_break:
-                    break_space = True
-                previous_space = True
-                previous_break = False
-            elif ch in u'\n\x85\u2028\u2029':
-                if index == 0:
-                    leading_break = True
-                if index == len(scalar)-1:
-                    trailing_break = True
-                if previous_space:
-                    space_break = True
-                previous_space = False
-                previous_break = True
-            else:
-                previous_space = False
-                previous_break = False
-
-            # Prepare for the next character.
-            index += 1
-            preceeded_by_whitespace = (ch in u'\0 \t\r\n\x85\u2028\u2029')
-            followed_by_whitespace = (index+1 >= len(scalar) or
-                    scalar[index+1] in u'\0 \t\r\n\x85\u2028\u2029')
-
-        # Let's decide what styles are allowed.
-        allow_flow_plain = True
-        allow_block_plain = True
-        allow_single_quoted = True
-        allow_double_quoted = True
-        allow_block = True
-
-        # Leading and trailing whitespaces are bad for plain scalars.
-        if (leading_space or leading_break
-                or trailing_space or trailing_break):
-            allow_flow_plain = allow_block_plain = False
-
-        # We do not permit trailing spaces for block scalars.
-        if trailing_space:
-            allow_block = False
-
-        # Spaces at the beginning of a new line are only acceptable for block
-        # scalars.
-        if break_space:
-            allow_flow_plain = allow_block_plain = allow_single_quoted = False
-
-        # Spaces followed by breaks, as well as special character are only
-        # allowed for double quoted scalars.
-        if space_break or special_characters:
-            allow_flow_plain = allow_block_plain =  \
-            allow_single_quoted = allow_block = False
-
-        # Although the plain scalar writer supports breaks, we never emit
-        # multiline plain scalars.
-        if line_breaks:
-            allow_flow_plain = allow_block_plain = False
-
-        # Flow indicators are forbidden for flow plain scalars.
-        if flow_indicators:
-            allow_flow_plain = False
-
-        # Block indicators are forbidden for block plain scalars.
-        if block_indicators:
-            allow_block_plain = False
-
-        return ScalarAnalysis(scalar=scalar,
-                empty=False, multiline=line_breaks,
-                allow_flow_plain=allow_flow_plain,
-                allow_block_plain=allow_block_plain,
-                allow_single_quoted=allow_single_quoted,
-                allow_double_quoted=allow_double_quoted,
-                allow_block=allow_block)
-
-    # Writers.
-
-    def flush_stream(self):
-        if hasattr(self.stream, 'flush'):
-            self.stream.flush()
-
-    def write_stream_start(self):
-        # Write BOM if needed.
-        if self.encoding and self.encoding.startswith('utf-16'):
-            self.stream.write(u'\uFEFF'.encode(self.encoding))
-
-    def write_stream_end(self):
-        self.flush_stream()
-
-    def write_indicator(self, indicator, need_whitespace,
-            whitespace=False, indention=False):
-        if self.whitespace or not need_whitespace:
-            data = indicator
-        else:
-            data = u' '+indicator
-        self.whitespace = whitespace
-        self.indention = self.indention and indention
-        self.column += len(data)
-        self.open_ended = False
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-
-    def write_indent(self):
-        indent = self.indent or 0
-        if not self.indention or self.column > indent   \
-                or (self.column == indent and not self.whitespace):
-            self.write_line_break()
-        if self.column < indent:
-            self.whitespace = True
-            data = u' '*(indent-self.column)
-            self.column = indent
-            if self.encoding:
-                data = data.encode(self.encoding)
-            self.stream.write(data)
-
-    def write_line_break(self, data=None):
-        if data is None:
-            data = self.best_line_break
-        self.whitespace = True
-        self.indention = True
-        self.line += 1
-        self.column = 0
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-
-    def write_version_directive(self, version_text):
-        data = u'%%YAML %s' % version_text
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-        self.write_line_break()
-
-    def write_tag_directive(self, handle_text, prefix_text):
-        data = u'%%TAG %s %s' % (handle_text, prefix_text)
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-        self.write_line_break()
-
-    # Scalar streams.
-
-    def write_single_quoted(self, text, split=True):
-        self.write_indicator(u'\'', True)
-        spaces = False
-        breaks = False
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if spaces:
-                if ch is None or ch != u' ':
-                    if start+1 == end and self.column > self.best_width and split   \
-                            and start != 0 and end != len(text):
-                        self.write_indent()
-                    else:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                    start = end
-            elif breaks:
-                if ch is None or ch not in u'\n\x85\u2028\u2029':
-                    if text[start] == u'\n':
-                        self.write_line_break()
-                    for br in text[start:end]:
-                        if br == u'\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    self.write_indent()
-                    start = end
-            else:
-                if ch is None or ch in u' \n\x85\u2028\u2029' or ch == u'\'':
-                    if start < end:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                        start = end
-            if ch == u'\'':
-                data = u'\'\''
-                self.column += 2
-                if self.encoding:
-                    data = data.encode(self.encoding)
-                self.stream.write(data)
-                start = end + 1
-            if ch is not None:
-                spaces = (ch == u' ')
-                breaks = (ch in u'\n\x85\u2028\u2029')
-            end += 1
-        self.write_indicator(u'\'', False)
-
-    ESCAPE_REPLACEMENTS = {
-        u'\0':      u'0',
-        u'\x07':    u'a',
-        u'\x08':    u'b',
-        u'\x09':    u't',
-        u'\x0A':    u'n',
-        u'\x0B':    u'v',
-        u'\x0C':    u'f',
-        u'\x0D':    u'r',
-        u'\x1B':    u'e',
-        u'\"':      u'\"',
-        u'\\':      u'\\',
-        u'\x85':    u'N',
-        u'\xA0':    u'_',
-        u'\u2028':  u'L',
-        u'\u2029':  u'P',
-    }
-
-    def write_double_quoted(self, text, split=True):
-        self.write_indicator(u'"', True)
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if ch is None or ch in u'"\\\x85\u2028\u2029\uFEFF' \
-                    or not (u'\x20' <= ch <= u'\x7E'
-                        or (self.allow_unicode
-                            and (u'\xA0' <= ch <= u'\uD7FF'
-                                or u'\uE000' <= ch <= u'\uFFFD'))):
-                if start < end:
-                    data = text[start:end]
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    start = end
-                if ch is not None:
-                    if ch in self.ESCAPE_REPLACEMENTS:
-                        data = u'\\'+self.ESCAPE_REPLACEMENTS[ch]
-                    elif ch <= u'\xFF':
-                        data = u'\\x%02X' % ord(ch)
-                    elif ch <= u'\uFFFF':
-                        data = u'\\u%04X' % ord(ch)
-                    else:
-                        data = u'\\U%08X' % ord(ch)
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    start = end+1
-            if 0 < end < len(text)-1 and (ch == u' ' or start >= end)   \
-                    and self.column+(end-start) > self.best_width and split:
-                data = text[start:end]+u'\\'
-                if start < end:
-                    start = end
-                self.column += len(data)
-                if self.encoding:
-                    data = data.encode(self.encoding)
-                self.stream.write(data)
-                self.write_indent()
-                self.whitespace = False
-                self.indention = False
-                if text[start] == u' ':
-                    data = u'\\'
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-            end += 1
-        self.write_indicator(u'"', False)
-
-    def determine_block_hints(self, text):
-        hints = u''
-        if text:
-            if text[0] in u' \n\x85\u2028\u2029':
-                hints += unicode(self.best_indent)
-            if text[-1] not in u'\n\x85\u2028\u2029':
-                hints += u'-'
-            elif len(text) == 1 or text[-2] in u'\n\x85\u2028\u2029':
-                hints += u'+'
-        return hints
-
-    def write_folded(self, text):
-        hints = self.determine_block_hints(text)
-        self.write_indicator(u'>'+hints, True)
-        if hints[-1:] == u'+':
-            self.open_ended = True
-        self.write_line_break()
-        leading_space = True
-        spaces = False
-        breaks = True
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if breaks:
-                if ch is None or ch not in u'\n\x85\u2028\u2029':
-                    if not leading_space and ch is not None and ch != u' '  \
-                            and text[start] == u'\n':
-                        self.write_line_break()
-                    leading_space = (ch == u' ')
-                    for br in text[start:end]:
-                        if br == u'\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    if ch is not None:
-                        self.write_indent()
-                    start = end
-            elif spaces:
-                if ch != u' ':
-                    if start+1 == end and self.column > self.best_width:
-                        self.write_indent()
-                    else:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                    start = end
-            else:
-                if ch is None or ch in u' \n\x85\u2028\u2029':
-                    data = text[start:end]
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    if ch is None:
-                        self.write_line_break()
-                    start = end
-            if ch is not None:
-                breaks = (ch in u'\n\x85\u2028\u2029')
-                spaces = (ch == u' ')
-            end += 1
-
-    def write_literal(self, text):
-        hints = self.determine_block_hints(text)
-        self.write_indicator(u'|'+hints, True)
-        if hints[-1:] == u'+':
-            self.open_ended = True
-        self.write_line_break()
-        breaks = True
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if breaks:
-                if ch is None or ch not in u'\n\x85\u2028\u2029':
-                    for br in text[start:end]:
-                        if br == u'\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    if ch is not None:
-                        self.write_indent()
-                    start = end
-            else:
-                if ch is None or ch in u'\n\x85\u2028\u2029':
-                    data = text[start:end]
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    if ch is None:
-                        self.write_line_break()
-                    start = end
-            if ch is not None:
-                breaks = (ch in u'\n\x85\u2028\u2029')
-            end += 1
-
-    def write_plain(self, text, split=True):
-        if self.root_context:
-            self.open_ended = True
-        if not text:
-            return
-        if not self.whitespace:
-            data = u' '
-            self.column += len(data)
-            if self.encoding:
-                data = data.encode(self.encoding)
-            self.stream.write(data)
-        self.whitespace = False
-        self.indention = False
-        spaces = False
-        breaks = False
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if spaces:
-                if ch != u' ':
-                    if start+1 == end and self.column > self.best_width and split:
-                        self.write_indent()
-                        self.whitespace = False
-                        self.indention = False
-                    else:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                    start = end
-            elif breaks:
-                if ch not in u'\n\x85\u2028\u2029':
-                    if text[start] == u'\n':
-                        self.write_line_break()
-                    for br in text[start:end]:
-                        if br == u'\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    self.write_indent()
-                    self.whitespace = False
-                    self.indention = False
-                    start = end
-            else:
-                if ch is None or ch in u' \n\x85\u2028\u2029':
-                    data = text[start:end]
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    start = end
-            if ch is not None:
-                spaces = (ch == u' ')
-                breaks = (ch in u'\n\x85\u2028\u2029')
-            end += 1
-
diff --git a/python.d/python_modules/pyyaml2/error.py b/python.d/python_modules/pyyaml2/error.py
deleted file mode 100644
index 577686db..00000000
--- a/python.d/python_modules/pyyaml2/error.py
+++ /dev/null
@@ -1,75 +0,0 @@
-
-__all__ = ['Mark', 'YAMLError', 'MarkedYAMLError']
-
-class Mark(object):
-
-    def __init__(self, name, index, line, column, buffer, pointer):
-        self.name = name
-        self.index = index
-        self.line = line
-        self.column = column
-        self.buffer = buffer
-        self.pointer = pointer
-
-    def get_snippet(self, indent=4, max_length=75):
-        if self.buffer is None:
-            return None
-        head = ''
-        start = self.pointer
-        while start > 0 and self.buffer[start-1] not in u'\0\r\n\x85\u2028\u2029':
-            start -= 1
-            if self.pointer-start > max_length/2-1:
-                head = ' ... '
-                start += 5
-                break
-        tail = ''
-        end = self.pointer
-        while end < len(self.buffer) and self.buffer[end] not in u'\0\r\n\x85\u2028\u2029':
-            end += 1
-            if end-self.pointer > max_length/2-1:
-                tail = ' ... '
-                end -= 5
-                break
-        snippet = self.buffer[start:end].encode('utf-8')
-        return ' '*indent + head + snippet + tail + '\n'  \
-                + ' '*(indent+self.pointer-start+len(head)) + '^'
-
-    def __str__(self):
-        snippet = self.get_snippet()
-        where = "  in \"%s\", line %d, column %d"   \
-                % (self.name, self.line+1, self.column+1)
-        if snippet is not None:
-            where += ":\n"+snippet
-        return where
-
-class YAMLError(Exception):
-    pass
-
-class MarkedYAMLError(YAMLError):
-
-    def __init__(self, context=None, context_mark=None,
-            problem=None, problem_mark=None, note=None):
-        self.context = context
-        self.context_mark = context_mark
-        self.problem = problem
-        self.problem_mark = problem_mark
-        self.note = note
-
-    def __str__(self):
-        lines = []
-        if self.context is not None:
-            lines.append(self.context)
-        if self.context_mark is not None  \
-            and (self.problem is None or self.problem_mark is None
-                    or self.context_mark.name != self.problem_mark.name
-                    or self.context_mark.line != self.problem_mark.line
-                    or self.context_mark.column != self.problem_mark.column):
-            lines.append(str(self.context_mark))
-        if self.problem is not None:
-            lines.append(self.problem)
-        if self.problem_mark is not None:
-            lines.append(str(self.problem_mark))
-        if self.note is not None:
-            lines.append(self.note)
-        return '\n'.join(lines)
-
diff --git a/python.d/python_modules/pyyaml2/events.py b/python.d/python_modules/pyyaml2/events.py
deleted file mode 100644
index f79ad389..00000000
--- a/python.d/python_modules/pyyaml2/events.py
+++ /dev/null
@@ -1,86 +0,0 @@
-
-# Abstract classes.
-
-class Event(object):
-    def __init__(self, start_mark=None, end_mark=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-    def __repr__(self):
-        attributes = [key for key in ['anchor', 'tag', 'implicit', 'value']
-                if hasattr(self, key)]
-        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
-                for key in attributes])
-        return '%s(%s)' % (self.__class__.__name__, arguments)
-
-class NodeEvent(Event):
-    def __init__(self, anchor, start_mark=None, end_mark=None):
-        self.anchor = anchor
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class CollectionStartEvent(NodeEvent):
-    def __init__(self, anchor, tag, implicit, start_mark=None, end_mark=None,
-            flow_style=None):
-        self.anchor = anchor
-        self.tag = tag
-        self.implicit = implicit
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.flow_style = flow_style
-
-class CollectionEndEvent(Event):
-    pass
-
-# Implementations.
-
-class StreamStartEvent(Event):
-    def __init__(self, start_mark=None, end_mark=None, encoding=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.encoding = encoding
-
-class StreamEndEvent(Event):
-    pass
-
-class DocumentStartEvent(Event):
-    def __init__(self, start_mark=None, end_mark=None,
-            explicit=None, version=None, tags=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.explicit = explicit
-        self.version = version
-        self.tags = tags
-
-class DocumentEndEvent(Event):
-    def __init__(self, start_mark=None, end_mark=None,
-            explicit=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.explicit = explicit
-
-class AliasEvent(NodeEvent):
-    pass
-
-class ScalarEvent(NodeEvent):
-    def __init__(self, anchor, tag, implicit, value,
-            start_mark=None, end_mark=None, style=None):
-        self.anchor = anchor
-        self.tag = tag
-        self.implicit = implicit
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.style = style
-
-class SequenceStartEvent(CollectionStartEvent):
-    pass
-
-class SequenceEndEvent(CollectionEndEvent):
-    pass
-
-class MappingStartEvent(CollectionStartEvent):
-    pass
-
-class MappingEndEvent(CollectionEndEvent):
-    pass
-
diff --git a/python.d/python_modules/pyyaml2/loader.py b/python.d/python_modules/pyyaml2/loader.py
deleted file mode 100644
index 293ff467..00000000
--- a/python.d/python_modules/pyyaml2/loader.py
+++ /dev/null
@@ -1,40 +0,0 @@
-
-__all__ = ['BaseLoader', 'SafeLoader', 'Loader']
-
-from reader import *
-from scanner import *
-from parser import *
-from composer import *
-from constructor import *
-from resolver import *
-
-class BaseLoader(Reader, Scanner, Parser, Composer, BaseConstructor, BaseResolver):
-
-    def __init__(self, stream):
-        Reader.__init__(self, stream)
-        Scanner.__init__(self)
-        Parser.__init__(self)
-        Composer.__init__(self)
-        BaseConstructor.__init__(self)
-        BaseResolver.__init__(self)
-
-class SafeLoader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
-
-    def __init__(self, stream):
-        Reader.__init__(self, stream)
-        Scanner.__init__(self)
-        Parser.__init__(self)
-        Composer.__init__(self)
-        SafeConstructor.__init__(self)
-        Resolver.__init__(self)
-
-class Loader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
-
-    def __init__(self, stream):
-        Reader.__init__(self, stream)
-        Scanner.__init__(self)
-        Parser.__init__(self)
-        Composer.__init__(self)
-        Constructor.__init__(self)
-        Resolver.__init__(self)
-
diff --git a/python.d/python_modules/pyyaml2/nodes.py b/python.d/python_modules/pyyaml2/nodes.py
deleted file mode 100644
index c4f070c4..00000000
--- a/python.d/python_modules/pyyaml2/nodes.py
+++ /dev/null
@@ -1,49 +0,0 @@
-
-class Node(object):
-    def __init__(self, tag, value, start_mark, end_mark):
-        self.tag = tag
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-    def __repr__(self):
-        value = self.value
-        #if isinstance(value, list):
-        #    if len(value) == 0:
-        #        value = '<empty>'
-        #    elif len(value) == 1:
-        #        value = '<1 item>'
-        #    else:
-        #        value = '<%d items>' % len(value)
-        #else:
-        #    if len(value) > 75:
-        #        value = repr(value[:70]+u' ... ')
-        #    else:
-        #        value = repr(value)
-        value = repr(value)
-        return '%s(tag=%r, value=%s)' % (self.__class__.__name__, self.tag, value)
-
-class ScalarNode(Node):
-    id = 'scalar'
-    def __init__(self, tag, value,
-            start_mark=None, end_mark=None, style=None):
-        self.tag = tag
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.style = style
-
-class CollectionNode(Node):
-    def __init__(self, tag, value,
-            start_mark=None, end_mark=None, flow_style=None):
-        self.tag = tag
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.flow_style = flow_style
-
-class SequenceNode(CollectionNode):
-    id = 'sequence'
-
-class MappingNode(CollectionNode):
-    id = 'mapping'
-
diff --git a/python.d/python_modules/pyyaml2/parser.py b/python.d/python_modules/pyyaml2/parser.py
deleted file mode 100644
index f9e3057f..00000000
--- a/python.d/python_modules/pyyaml2/parser.py
+++ /dev/null
@@ -1,589 +0,0 @@
-
-# The following YAML grammar is LL(1) and is parsed by a recursive descent
-# parser.
-#
-# stream            ::= STREAM-START implicit_document? explicit_document* STREAM-END
-# implicit_document ::= block_node DOCUMENT-END*
-# explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-# block_node_or_indentless_sequence ::=
-#                       ALIAS
-#                       | properties (block_content | indentless_block_sequence)?
-#                       | block_content
-#                       | indentless_block_sequence
-# block_node        ::= ALIAS
-#                       | properties block_content?
-#                       | block_content
-# flow_node         ::= ALIAS
-#                       | properties flow_content?
-#                       | flow_content
-# properties        ::= TAG ANCHOR? | ANCHOR TAG?
-# block_content     ::= block_collection | flow_collection | SCALAR
-# flow_content      ::= flow_collection | SCALAR
-# block_collection  ::= block_sequence | block_mapping
-# flow_collection   ::= flow_sequence | flow_mapping
-# block_sequence    ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
-# indentless_sequence   ::= (BLOCK-ENTRY block_node?)+
-# block_mapping     ::= BLOCK-MAPPING_START
-#                       ((KEY block_node_or_indentless_sequence?)?
-#                       (VALUE block_node_or_indentless_sequence?)?)*
-#                       BLOCK-END
-# flow_sequence     ::= FLOW-SEQUENCE-START
-#                       (flow_sequence_entry FLOW-ENTRY)*
-#                       flow_sequence_entry?
-#                       FLOW-SEQUENCE-END
-# flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-# flow_mapping      ::= FLOW-MAPPING-START
-#                       (flow_mapping_entry FLOW-ENTRY)*
-#                       flow_mapping_entry?
-#                       FLOW-MAPPING-END
-# flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-#
-# FIRST sets:
-#
-# stream: { STREAM-START }
-# explicit_document: { DIRECTIVE DOCUMENT-START }
-# implicit_document: FIRST(block_node)
-# block_node: { ALIAS TAG ANCHOR SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# flow_node: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# block_content: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
-# flow_content: { FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
-# block_collection: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START }
-# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# block_sequence: { BLOCK-SEQUENCE-START }
-# block_mapping: { BLOCK-MAPPING-START }
-# block_node_or_indentless_sequence: { ALIAS ANCHOR TAG SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START BLOCK-ENTRY }
-# indentless_sequence: { ENTRY }
-# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# flow_sequence: { FLOW-SEQUENCE-START }
-# flow_mapping: { FLOW-MAPPING-START }
-# flow_sequence_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
-# flow_mapping_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
-
-__all__ = ['Parser', 'ParserError']
-
-from error import MarkedYAMLError
-from tokens import *
-from events import *
-from scanner import *
-
-class ParserError(MarkedYAMLError):
-    pass
-
-class Parser(object):
-    # Since writing a recursive-descendant parser is a straightforward task, we
-    # do not give many comments here.
-
-    DEFAULT_TAGS = {
-        u'!':   u'!',
-        u'!!':  u'tag:yaml.org,2002:',
-    }
-
-    def __init__(self):
-        self.current_event = None
-        self.yaml_version = None
-        self.tag_handles = {}
-        self.states = []
-        self.marks = []
-        self.state = self.parse_stream_start
-
-    def dispose(self):
-        # Reset the state attributes (to clear self-references)
-        self.states = []
-        self.state = None
-
-    def check_event(self, *choices):
-        # Check the type of the next event.
-        if self.current_event is None:
-            if self.state:
-                self.current_event = self.state()
-        if self.current_event is not None:
-            if not choices:
-                return True
-            for choice in choices:
-                if isinstance(self.current_event, choice):
-                    return True
-        return False
-
-    def peek_event(self):
-        # Get the next event.
-        if self.current_event is None:
-            if self.state:
-                self.current_event = self.state()
-        return self.current_event
-
-    def get_event(self):
-        # Get the next event and proceed further.
-        if self.current_event is None:
-            if self.state:
-                self.current_event = self.state()
-        value = self.current_event
-        self.current_event = None
-        return value
-
-    # stream    ::= STREAM-START implicit_document? explicit_document* STREAM-END
-    # implicit_document ::= block_node DOCUMENT-END*
-    # explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-
-    def parse_stream_start(self):
-
-        # Parse the stream start.
-        token = self.get_token()
-        event = StreamStartEvent(token.start_mark, token.end_mark,
-                encoding=token.encoding)
-
-        # Prepare the next state.
-        self.state = self.parse_implicit_document_start
-
-        return event
-
-    def parse_implicit_document_start(self):
-
-        # Parse an implicit document.
-        if not self.check_token(DirectiveToken, DocumentStartToken,
-                StreamEndToken):
-            self.tag_handles = self.DEFAULT_TAGS
-            token = self.peek_token()
-            start_mark = end_mark = token.start_mark
-            event = DocumentStartEvent(start_mark, end_mark,
-                    explicit=False)
-
-            # Prepare the next state.
-            self.states.append(self.parse_document_end)
-            self.state = self.parse_block_node
-
-            return event
-
-        else:
-            return self.parse_document_start()
-
-    def parse_document_start(self):
-
-        # Parse any extra document end indicators.
-        while self.check_token(DocumentEndToken):
-            self.get_token()
-
-        # Parse an explicit document.
-        if not self.check_token(StreamEndToken):
-            token = self.peek_token()
-            start_mark = token.start_mark
-            version, tags = self.process_directives()
-            if not self.check_token(DocumentStartToken):
-                raise ParserError(None, None,
-                        "expected '<document start>', but found %r"
-                        % self.peek_token().id,
-                        self.peek_token().start_mark)
-            token = self.get_token()
-            end_mark = token.end_mark
-            event = DocumentStartEvent(start_mark, end_mark,
-                    explicit=True, version=version, tags=tags)
-            self.states.append(self.parse_document_end)
-            self.state = self.parse_document_content
-        else:
-            # Parse the end of the stream.
-            token = self.get_token()
-            event = StreamEndEvent(token.start_mark, token.end_mark)
-            assert not self.states
-            assert not self.marks
-            self.state = None
-        return event
-
-    def parse_document_end(self):
-
-        # Parse the document end.
-        token = self.peek_token()
-        start_mark = end_mark = token.start_mark
-        explicit = False
-        if self.check_token(DocumentEndToken):
-            token = self.get_token()
-            end_mark = token.end_mark
-            explicit = True
-        event = DocumentEndEvent(start_mark, end_mark,
-                explicit=explicit)
-
-        # Prepare the next state.
-        self.state = self.parse_document_start
-
-        return event
-
-    def parse_document_content(self):
-        if self.check_token(DirectiveToken,
-                DocumentStartToken, DocumentEndToken, StreamEndToken):
-            event = self.process_empty_scalar(self.peek_token().start_mark)
-            self.state = self.states.pop()
-            return event
-        else:
-            return self.parse_block_node()
-
-    def process_directives(self):
-        self.yaml_version = None
-        self.tag_handles = {}
-        while self.check_token(DirectiveToken):
-            token = self.get_token()
-            if token.name == u'YAML':
-                if self.yaml_version is not None:
-                    raise ParserError(None, None,
-                            "found duplicate YAML directive", token.start_mark)
-                major, minor = token.value
-                if major != 1:
-                    raise ParserError(None, None,
-                            "found incompatible YAML document (version 1.* is required)",
-                            token.start_mark)
-                self.yaml_version = token.value
-            elif token.name == u'TAG':
-                handle, prefix = token.value
-                if handle in self.tag_handles:
-                    raise ParserError(None, None,
-                            "duplicate tag handle %r" % handle.encode('utf-8'),
-                            token.start_mark)
-                self.tag_handles[handle] = prefix
-        if self.tag_handles:
-            value = self.yaml_version, self.tag_handles.copy()
-        else:
-            value = self.yaml_version, None
-        for key in self.DEFAULT_TAGS:
-            if key not in self.tag_handles:
-                self.tag_handles[key] = self.DEFAULT_TAGS[key]
-        return value
-
-    # block_node_or_indentless_sequence ::= ALIAS
-    #               | properties (block_content | indentless_block_sequence)?
-    #               | block_content
-    #               | indentless_block_sequence
-    # block_node    ::= ALIAS
-    #                   | properties block_content?
-    #                   | block_content
-    # flow_node     ::= ALIAS
-    #                   | properties flow_content?
-    #                   | flow_content
-    # properties    ::= TAG ANCHOR? | ANCHOR TAG?
-    # block_content     ::= block_collection | flow_collection | SCALAR
-    # flow_content      ::= flow_collection | SCALAR
-    # block_collection  ::= block_sequence | block_mapping
-    # flow_collection   ::= flow_sequence | flow_mapping
-
-    def parse_block_node(self):
-        return self.parse_node(block=True)
-
-    def parse_flow_node(self):
-        return self.parse_node()
-
-    def parse_block_node_or_indentless_sequence(self):
-        return self.parse_node(block=True, indentless_sequence=True)
-
-    def parse_node(self, block=False, indentless_sequence=False):
-        if self.check_token(AliasToken):
-            token = self.get_token()
-            event = AliasEvent(token.value, token.start_mark, token.end_mark)
-            self.state = self.states.pop()
-        else:
-            anchor = None
-            tag = None
-            start_mark = end_mark = tag_mark = None
-            if self.check_token(AnchorToken):
-                token = self.get_token()
-                start_mark = token.start_mark
-                end_mark = token.end_mark
-                anchor = token.value
-                if self.check_token(TagToken):
-                    token = self.get_token()
-                    tag_mark = token.start_mark
-                    end_mark = token.end_mark
-                    tag = token.value
-            elif self.check_token(TagToken):
-                token = self.get_token()
-                start_mark = tag_mark = token.start_mark
-                end_mark = token.end_mark
-                tag = token.value
-                if self.check_token(AnchorToken):
-                    token = self.get_token()
-                    end_mark = token.end_mark
-                    anchor = token.value
-            if tag is not None:
-                handle, suffix = tag
-                if handle is not None:
-                    if handle not in self.tag_handles:
-                        raise ParserError("while parsing a node", start_mark,
-                                "found undefined tag handle %r" % handle.encode('utf-8'),
-                                tag_mark)
-                    tag = self.tag_handles[handle]+suffix
-                else:
-                    tag = suffix
-            #if tag == u'!':
-            #    raise ParserError("while parsing a node", start_mark,
-            #            "found non-specific tag '!'", tag_mark,
-            #            "Please check 'http://pyyaml.org/wiki/YAMLNonSpecificTag' and share your opinion.")
-            if start_mark is None:
-                start_mark = end_mark = self.peek_token().start_mark
-            event = None
-            implicit = (tag is None or tag == u'!')
-            if indentless_sequence and self.check_token(BlockEntryToken):
-                end_mark = self.peek_token().end_mark
-                event = SequenceStartEvent(anchor, tag, implicit,
-                        start_mark, end_mark)
-                self.state = self.parse_indentless_sequence_entry
-            else:
-                if self.check_token(ScalarToken):
-                    token = self.get_token()
-                    end_mark = token.end_mark
-                    if (token.plain and tag is None) or tag == u'!':
-                        implicit = (True, False)
-                    elif tag is None:
-                        implicit = (False, True)
-                    else:
-                        implicit = (False, False)
-                    event = ScalarEvent(anchor, tag, implicit, token.value,
-                            start_mark, end_mark, style=token.style)
-                    self.state = self.states.pop()
-                elif self.check_token(FlowSequenceStartToken):
-                    end_mark = self.peek_token().end_mark
-                    event = SequenceStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=True)
-                    self.state = self.parse_flow_sequence_first_entry
-                elif self.check_token(FlowMappingStartToken):
-                    end_mark = self.peek_token().end_mark
-                    event = MappingStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=True)
-                    self.state = self.parse_flow_mapping_first_key
-                elif block and self.check_token(BlockSequenceStartToken):
-                    end_mark = self.peek_token().start_mark
-                    event = SequenceStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=False)
-                    self.state = self.parse_block_sequence_first_entry
-                elif block and self.check_token(BlockMappingStartToken):
-                    end_mark = self.peek_token().start_mark
-                    event = MappingStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=False)
-                    self.state = self.parse_block_mapping_first_key
-                elif anchor is not None or tag is not None:
-                    # Empty scalars are allowed even if a tag or an anchor is
-                    # specified.
-                    event = ScalarEvent(anchor, tag, (implicit, False), u'',
-                            start_mark, end_mark)
-                    self.state = self.states.pop()
-                else:
-                    if block:
-                        node = 'block'
-                    else:
-                        node = 'flow'
-                    token = self.peek_token()
-                    raise ParserError("while parsing a %s node" % node, start_mark,
-                            "expected the node content, but found %r" % token.id,
-                            token.start_mark)
-        return event
-
-    # block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
-
-    def parse_block_sequence_first_entry(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_block_sequence_entry()
-
-    def parse_block_sequence_entry(self):
-        if self.check_token(BlockEntryToken):
-            token = self.get_token()
-            if not self.check_token(BlockEntryToken, BlockEndToken):
-                self.states.append(self.parse_block_sequence_entry)
-                return self.parse_block_node()
-            else:
-                self.state = self.parse_block_sequence_entry
-                return self.process_empty_scalar(token.end_mark)
-        if not self.check_token(BlockEndToken):
-            token = self.peek_token()
-            raise ParserError("while parsing a block collection", self.marks[-1],
-                    "expected <block end>, but found %r" % token.id, token.start_mark)
-        token = self.get_token()
-        event = SequenceEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    # indentless_sequence ::= (BLOCK-ENTRY block_node?)+
-
-    def parse_indentless_sequence_entry(self):
-        if self.check_token(BlockEntryToken):
-            token = self.get_token()
-            if not self.check_token(BlockEntryToken,
-                    KeyToken, ValueToken, BlockEndToken):
-                self.states.append(self.parse_indentless_sequence_entry)
-                return self.parse_block_node()
-            else:
-                self.state = self.parse_indentless_sequence_entry
-                return self.process_empty_scalar(token.end_mark)
-        token = self.peek_token()
-        event = SequenceEndEvent(token.start_mark, token.start_mark)
-        self.state = self.states.pop()
-        return event
-
-    # block_mapping     ::= BLOCK-MAPPING_START
-    #                       ((KEY block_node_or_indentless_sequence?)?
-    #                       (VALUE block_node_or_indentless_sequence?)?)*
-    #                       BLOCK-END
-
-    def parse_block_mapping_first_key(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_block_mapping_key()
-
-    def parse_block_mapping_key(self):
-        if self.check_token(KeyToken):
-            token = self.get_token()
-            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
-                self.states.append(self.parse_block_mapping_value)
-                return self.parse_block_node_or_indentless_sequence()
-            else:
-                self.state = self.parse_block_mapping_value
-                return self.process_empty_scalar(token.end_mark)
-        if not self.check_token(BlockEndToken):
-            token = self.peek_token()
-            raise ParserError("while parsing a block mapping", self.marks[-1],
-                    "expected <block end>, but found %r" % token.id, token.start_mark)
-        token = self.get_token()
-        event = MappingEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    def parse_block_mapping_value(self):
-        if self.check_token(ValueToken):
-            token = self.get_token()
-            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
-                self.states.append(self.parse_block_mapping_key)
-                return self.parse_block_node_or_indentless_sequence()
-            else:
-                self.state = self.parse_block_mapping_key
-                return self.process_empty_scalar(token.end_mark)
-        else:
-            self.state = self.parse_block_mapping_key
-            token = self.peek_token()
-            return self.process_empty_scalar(token.start_mark)
-
-    # flow_sequence     ::= FLOW-SEQUENCE-START
-    #                       (flow_sequence_entry FLOW-ENTRY)*
-    #                       flow_sequence_entry?
-    #                       FLOW-SEQUENCE-END
-    # flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-    #
-    # Note that while production rules for both flow_sequence_entry and
-    # flow_mapping_entry are equal, their interpretations are different.
-    # For `flow_sequence_entry`, the part `KEY flow_node? (VALUE flow_node?)?`
-    # generate an inline mapping (set syntax).
-
-    def parse_flow_sequence_first_entry(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_flow_sequence_entry(first=True)
-
-    def parse_flow_sequence_entry(self, first=False):
-        if not self.check_token(FlowSequenceEndToken):
-            if not first:
-                if self.check_token(FlowEntryToken):
-                    self.get_token()
-                else:
-                    token = self.peek_token()
-                    raise ParserError("while parsing a flow sequence", self.marks[-1],
-                            "expected ',' or ']', but got %r" % token.id, token.start_mark)
-            
-            if self.check_token(KeyToken):
-                token = self.peek_token()
-                event = MappingStartEvent(None, None, True,
-                        token.start_mark, token.end_mark,
-                        flow_style=True)
-                self.state = self.parse_flow_sequence_entry_mapping_key
-                return event
-            elif not self.check_token(FlowSequenceEndToken):
-                self.states.append(self.parse_flow_sequence_entry)
-                return self.parse_flow_node()
-        token = self.get_token()
-        event = SequenceEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    def parse_flow_sequence_entry_mapping_key(self):
-        token = self.get_token()
-        if not self.check_token(ValueToken,
-                FlowEntryToken, FlowSequenceEndToken):
-            self.states.append(self.parse_flow_sequence_entry_mapping_value)
-            return self.parse_flow_node()
-        else:
-            self.state = self.parse_flow_sequence_entry_mapping_value
-            return self.process_empty_scalar(token.end_mark)
-
-    def parse_flow_sequence_entry_mapping_value(self):
-        if self.check_token(ValueToken):
-            token = self.get_token()
-            if not self.check_token(FlowEntryToken, FlowSequenceEndToken):
-                self.states.append(self.parse_flow_sequence_entry_mapping_end)
-                return self.parse_flow_node()
-            else:
-                self.state = self.parse_flow_sequence_entry_mapping_end
-                return self.process_empty_scalar(token.end_mark)
-        else:
-            self.state = self.parse_flow_sequence_entry_mapping_end
-            token = self.peek_token()
-            return self.process_empty_scalar(token.start_mark)
-
-    def parse_flow_sequence_entry_mapping_end(self):
-        self.state = self.parse_flow_sequence_entry
-        token = self.peek_token()
-        return MappingEndEvent(token.start_mark, token.start_mark)
-
-    # flow_mapping  ::= FLOW-MAPPING-START
-    #                   (flow_mapping_entry FLOW-ENTRY)*
-    #                   flow_mapping_entry?
-    #                   FLOW-MAPPING-END
-    # flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-
-    def parse_flow_mapping_first_key(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_flow_mapping_key(first=True)
-
-    def parse_flow_mapping_key(self, first=False):
-        if not self.check_token(FlowMappingEndToken):
-            if not first:
-                if self.check_token(FlowEntryToken):
-                    self.get_token()
-                else:
-                    token = self.peek_token()
-                    raise ParserError("while parsing a flow mapping", self.marks[-1],
-                            "expected ',' or '}', but got %r" % token.id, token.start_mark)
-            if self.check_token(KeyToken):
-                token = self.get_token()
-                if not self.check_token(ValueToken,
-                        FlowEntryToken, FlowMappingEndToken):
-                    self.states.append(self.parse_flow_mapping_value)
-                    return self.parse_flow_node()
-                else:
-                    self.state = self.parse_flow_mapping_value
-                    return self.process_empty_scalar(token.end_mark)
-            elif not self.check_token(FlowMappingEndToken):
-                self.states.append(self.parse_flow_mapping_empty_value)
-                return self.parse_flow_node()
-        token = self.get_token()
-        event = MappingEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    def parse_flow_mapping_value(self):
-        if self.check_token(ValueToken):
-            token = self.get_token()
-            if not self.check_token(FlowEntryToken, FlowMappingEndToken):
-                self.states.append(self.parse_flow_mapping_key)
-                return self.parse_flow_node()
-            else:
-                self.state = self.parse_flow_mapping_key
-                return self.process_empty_scalar(token.end_mark)
-        else:
-            self.state = self.parse_flow_mapping_key
-            token = self.peek_token()
-            return self.process_empty_scalar(token.start_mark)
-
-    def parse_flow_mapping_empty_value(self):
-        self.state = self.parse_flow_mapping_key
-        return self.process_empty_scalar(self.peek_token().start_mark)
-
-    def process_empty_scalar(self, mark):
-        return ScalarEvent(None, None, (True, False), u'', mark, mark)
-
diff --git a/python.d/python_modules/pyyaml2/reader.py b/python.d/python_modules/pyyaml2/reader.py
deleted file mode 100644
index 3249e6b9..00000000
--- a/python.d/python_modules/pyyaml2/reader.py
+++ /dev/null
@@ -1,190 +0,0 @@
-# This module contains abstractions for the input stream. You don't have to
-# looks further, there are no pretty code.
-#
-# We define two classes here.
-#
-#   Mark(source, line, column)
-# It's just a record and its only use is producing nice error messages.
-# Parser does not use it for any other purposes.
-#
-#   Reader(source, data)
-# Reader determines the encoding of `data` and converts it to unicode.
-# Reader provides the following methods and attributes:
-#   reader.peek(length=1) - return the next `length` characters
-#   reader.forward(length=1) - move the current position to `length` characters.
-#   reader.index - the number of the current character.
-#   reader.line, stream.column - the line and the column of the current character.
-
-__all__ = ['Reader', 'ReaderError']
-
-from error import YAMLError, Mark
-
-import codecs, re
-
-class ReaderError(YAMLError):
-
-    def __init__(self, name, position, character, encoding, reason):
-        self.name = name
-        self.character = character
-        self.position = position
-        self.encoding = encoding
-        self.reason = reason
-
-    def __str__(self):
-        if isinstance(self.character, str):
-            return "'%s' codec can't decode byte #x%02x: %s\n"  \
-                    "  in \"%s\", position %d"    \
-                    % (self.encoding, ord(self.character), self.reason,
-                            self.name, self.position)
-        else:
-            return "unacceptable character #x%04x: %s\n"    \
-                    "  in \"%s\", position %d"    \
-                    % (self.character, self.reason,
-                            self.name, self.position)
-
-class Reader(object):
-    # Reader:
-    # - determines the data encoding and converts it to unicode,
-    # - checks if characters are in allowed range,
-    # - adds '\0' to the end.
-
-    # Reader accepts
-    #  - a `str` object,
-    #  - a `unicode` object,
-    #  - a file-like object with its `read` method returning `str`,
-    #  - a file-like object with its `read` method returning `unicode`.
-
-    # Yeah, it's ugly and slow.
-
-    def __init__(self, stream):
-        self.name = None
-        self.stream = None
-        self.stream_pointer = 0
-        self.eof = True
-        self.buffer = u''
-        self.pointer = 0
-        self.raw_buffer = None
-        self.raw_decode = None
-        self.encoding = None
-        self.index = 0
-        self.line = 0
-        self.column = 0
-        if isinstance(stream, unicode):
-            self.name = "<unicode string>"
-            self.check_printable(stream)
-            self.buffer = stream+u'\0'
-        elif isinstance(stream, str):
-            self.name = "<string>"
-            self.raw_buffer = stream
-            self.determine_encoding()
-        else:
-            self.stream = stream
-            self.name = getattr(stream, 'name', "<file>")
-            self.eof = False
-            self.raw_buffer = ''
-            self.determine_encoding()
-
-    def peek(self, index=0):
-        try:
-            return self.buffer[self.pointer+index]
-        except IndexError:
-            self.update(index+1)
-            return self.buffer[self.pointer+index]
-
-    def prefix(self, length=1):
-        if self.pointer+length >= len(self.buffer):
-            self.update(length)
-        return self.buffer[self.pointer:self.pointer+length]
-
-    def forward(self, length=1):
-        if self.pointer+length+1 >= len(self.buffer):
-            self.update(length+1)
-        while length:
-            ch = self.buffer[self.pointer]
-            self.pointer += 1
-            self.index += 1
-            if ch in u'\n\x85\u2028\u2029'  \
-                    or (ch == u'\r' and self.buffer[self.pointer] != u'\n'):
-                self.line += 1
-                self.column = 0
-            elif ch != u'\uFEFF':
-                self.column += 1
-            length -= 1
-
-    def get_mark(self):
-        if self.stream is None:
-            return Mark(self.name, self.index, self.line, self.column,
-                    self.buffer, self.pointer)
-        else:
-            return Mark(self.name, self.index, self.line, self.column,
-                    None, None)
-
-    def determine_encoding(self):
-        while not self.eof and len(self.raw_buffer) < 2:
-            self.update_raw()
-        if not isinstance(self.raw_buffer, unicode):
-            if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
-                self.raw_decode = codecs.utf_16_le_decode
-                self.encoding = 'utf-16-le'
-            elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
-                self.raw_decode = codecs.utf_16_be_decode
-                self.encoding = 'utf-16-be'
-            else:
-                self.raw_decode = codecs.utf_8_decode
-                self.encoding = 'utf-8'
-        self.update(1)
-
-    NON_PRINTABLE = re.compile(u'[^\x09\x0A\x0D\x20-\x7E\x85\xA0-\uD7FF\uE000-\uFFFD]')
-    def check_printable(self, data):
-        match = self.NON_PRINTABLE.search(data)
-        if match:
-            character = match.group()
-            position = self.index+(len(self.buffer)-self.pointer)+match.start()
-            raise ReaderError(self.name, position, ord(character),
-                    'unicode', "special characters are not allowed")
-
-    def update(self, length):
-        if self.raw_buffer is None:
-            return
-        self.buffer = self.buffer[self.pointer:]
-        self.pointer = 0
-        while len(self.buffer) < length:
-            if not self.eof:
-                self.update_raw()
-            if self.raw_decode is not None:
-                try:
-                    data, converted = self.raw_decode(self.raw_buffer,
-                            'strict', self.eof)
-                except UnicodeDecodeError, exc:
-                    character = exc.object[exc.start]
-                    if self.stream is not None:
-                        position = self.stream_pointer-len(self.raw_buffer)+exc.start
-                    else:
-                        position = exc.start
-                    raise ReaderError(self.name, position, character,
-                            exc.encoding, exc.reason)
-            else:
-                data = self.raw_buffer
-                converted = len(data)
-            self.check_printable(data)
-            self.buffer += data
-            self.raw_buffer = self.raw_buffer[converted:]
-            if self.eof:
-                self.buffer += u'\0'
-                self.raw_buffer = None
-                break
-
-    def update_raw(self, size=1024):
-        data = self.stream.read(size)
-        if data:
-            self.raw_buffer += data
-            self.stream_pointer += len(data)
-        else:
-            self.eof = True
-
-#try:
-#    import psyco
-#    psyco.bind(Reader)
-#except ImportError:
-#    pass
-
diff --git a/python.d/python_modules/pyyaml2/representer.py b/python.d/python_modules/pyyaml2/representer.py
deleted file mode 100644
index 5f4fc70d..00000000
--- a/python.d/python_modules/pyyaml2/representer.py
+++ /dev/null
@@ -1,484 +0,0 @@
-
-__all__ = ['BaseRepresenter', 'SafeRepresenter', 'Representer',
-    'RepresenterError']
-
-from error import *
-from nodes import *
-
-import datetime
-
-import sys, copy_reg, types
-
-class RepresenterError(YAMLError):
-    pass
-
-class BaseRepresenter(object):
-
-    yaml_representers = {}
-    yaml_multi_representers = {}
-
-    def __init__(self, default_style=None, default_flow_style=None):
-        self.default_style = default_style
-        self.default_flow_style = default_flow_style
-        self.represented_objects = {}
-        self.object_keeper = []
-        self.alias_key = None
-
-    def represent(self, data):
-        node = self.represent_data(data)
-        self.serialize(node)
-        self.represented_objects = {}
-        self.object_keeper = []
-        self.alias_key = None
-
-    def get_classobj_bases(self, cls):
-        bases = [cls]
-        for base in cls.__bases__:
-            bases.extend(self.get_classobj_bases(base))
-        return bases
-
-    def represent_data(self, data):
-        if self.ignore_aliases(data):
-            self.alias_key = None
-        else:
-            self.alias_key = id(data)
-        if self.alias_key is not None:
-            if self.alias_key in self.represented_objects:
-                node = self.represented_objects[self.alias_key]
-                #if node is None:
-                #    raise RepresenterError("recursive objects are not allowed: %r" % data)
-                return node
-            #self.represented_objects[alias_key] = None
-            self.object_keeper.append(data)
-        data_types = type(data).__mro__
-        if type(data) is types.InstanceType:
-            data_types = self.get_classobj_bases(data.__class__)+list(data_types)
-        if data_types[0] in self.yaml_representers:
-            node = self.yaml_representers[data_types[0]](self, data)
-        else:
-            for data_type in data_types:
-                if data_type in self.yaml_multi_representers:
-                    node = self.yaml_multi_representers[data_type](self, data)
-                    break
-            else:
-                if None in self.yaml_multi_representers:
-                    node = self.yaml_multi_representers[None](self, data)
-                elif None in self.yaml_representers:
-                    node = self.yaml_representers[None](self, data)
-                else:
-                    node = ScalarNode(None, unicode(data))
-        #if alias_key is not None:
-        #    self.represented_objects[alias_key] = node
-        return node
-
-    def add_representer(cls, data_type, representer):
-        if not 'yaml_representers' in cls.__dict__:
-            cls.yaml_representers = cls.yaml_representers.copy()
-        cls.yaml_representers[data_type] = representer
-    add_representer = classmethod(add_representer)
-
-    def add_multi_representer(cls, data_type, representer):
-        if not 'yaml_multi_representers' in cls.__dict__:
-            cls.yaml_multi_representers = cls.yaml_multi_representers.copy()
-        cls.yaml_multi_representers[data_type] = representer
-    add_multi_representer = classmethod(add_multi_representer)
-
-    def represent_scalar(self, tag, value, style=None):
-        if style is None:
-            style = self.default_style
-        node = ScalarNode(tag, value, style=style)
-        if self.alias_key is not None:
-            self.represented_objects[self.alias_key] = node
-        return node
-
-    def represent_sequence(self, tag, sequence, flow_style=None):
-        value = []
-        node = SequenceNode(tag, value, flow_style=flow_style)
-        if self.alias_key is not None:
-            self.represented_objects[self.alias_key] = node
-        best_style = True
-        for item in sequence:
-            node_item = self.represent_data(item)
-            if not (isinstance(node_item, ScalarNode) and not node_item.style):
-                best_style = False
-            value.append(node_item)
-        if flow_style is None:
-            if self.default_flow_style is not None:
-                node.flow_style = self.default_flow_style
-            else:
-                node.flow_style = best_style
-        return node
-
-    def represent_mapping(self, tag, mapping, flow_style=None):
-        value = []
-        node = MappingNode(tag, value, flow_style=flow_style)
-        if self.alias_key is not None:
-            self.represented_objects[self.alias_key] = node
-        best_style = True
-        if hasattr(mapping, 'items'):
-            mapping = mapping.items()
-            mapping.sort()
-        for item_key, item_value in mapping:
-            node_key = self.represent_data(item_key)
-            node_value = self.represent_data(item_value)
-            if not (isinstance(node_key, ScalarNode) and not node_key.style):
-                best_style = False
-            if not (isinstance(node_value, ScalarNode) and not node_value.style):
-                best_style = False
-            value.append((node_key, node_value))
-        if flow_style is None:
-            if self.default_flow_style is not None:
-                node.flow_style = self.default_flow_style
-            else:
-                node.flow_style = best_style
-        return node
-
-    def ignore_aliases(self, data):
-        return False
-
-class SafeRepresenter(BaseRepresenter):
-
-    def ignore_aliases(self, data):
-        if data in [None, ()]:
-            return True
-        if isinstance(data, (str, unicode, bool, int, float)):
-            return True
-
-    def represent_none(self, data):
-        return self.represent_scalar(u'tag:yaml.org,2002:null',
-                u'null')
-
-    def represent_str(self, data):
-        tag = None
-        style = None
-        try:
-            data = unicode(data, 'ascii')
-            tag = u'tag:yaml.org,2002:str'
-        except UnicodeDecodeError:
-            try:
-                data = unicode(data, 'utf-8')
-                tag = u'tag:yaml.org,2002:str'
-            except UnicodeDecodeError:
-                data = data.encode('base64')
-                tag = u'tag:yaml.org,2002:binary'
-                style = '|'
-        return self.represent_scalar(tag, data, style=style)
-
-    def represent_unicode(self, data):
-        return self.represent_scalar(u'tag:yaml.org,2002:str', data)
-
-    def represent_bool(self, data):
-        if data:
-            value = u'true'
-        else:
-            value = u'false'
-        return self.represent_scalar(u'tag:yaml.org,2002:bool', value)
-
-    def represent_int(self, data):
-        return self.represent_scalar(u'tag:yaml.org,2002:int', unicode(data))
-
-    def represent_long(self, data):
-        return self.represent_scalar(u'tag:yaml.org,2002:int', unicode(data))
-
-    inf_value = 1e300
-    while repr(inf_value) != repr(inf_value*inf_value):
-        inf_value *= inf_value
-
-    def represent_float(self, data):
-        if data != data or (data == 0.0 and data == 1.0):
-            value = u'.nan'
-        elif data == self.inf_value:
-            value = u'.inf'
-        elif data == -self.inf_value:
-            value = u'-.inf'
-        else:
-            value = unicode(repr(data)).lower()
-            # Note that in some cases `repr(data)` represents a float number
-            # without the decimal parts.  For instance:
-            #   >>> repr(1e17)
-            #   '1e17'
-            # Unfortunately, this is not a valid float representation according
-            # to the definition of the `!!float` tag.  We fix this by adding
-            # '.0' before the 'e' symbol.
-            if u'.' not in value and u'e' in value:
-                value = value.replace(u'e', u'.0e', 1)
-        return self.represent_scalar(u'tag:yaml.org,2002:float', value)
-
-    def represent_list(self, data):
-        #pairs = (len(data) > 0 and isinstance(data, list))
-        #if pairs:
-        #    for item in data:
-        #        if not isinstance(item, tuple) or len(item) != 2:
-        #            pairs = False
-        #            break
-        #if not pairs:
-            return self.represent_sequence(u'tag:yaml.org,2002:seq', data)
-        #value = []
-        #for item_key, item_value in data:
-        #    value.append(self.represent_mapping(u'tag:yaml.org,2002:map',
-        #        [(item_key, item_value)]))
-        #return SequenceNode(u'tag:yaml.org,2002:pairs', value)
-
-    def represent_dict(self, data):
-        return self.represent_mapping(u'tag:yaml.org,2002:map', data)
-
-    def represent_set(self, data):
-        value = {}
-        for key in data:
-            value[key] = None
-        return self.represent_mapping(u'tag:yaml.org,2002:set', value)
-
-    def represent_date(self, data):
-        value = unicode(data.isoformat())
-        return self.represent_scalar(u'tag:yaml.org,2002:timestamp', value)
-
-    def represent_datetime(self, data):
-        value = unicode(data.isoformat(' '))
-        return self.represent_scalar(u'tag:yaml.org,2002:timestamp', value)
-
-    def represent_yaml_object(self, tag, data, cls, flow_style=None):
-        if hasattr(data, '__getstate__'):
-            state = data.__getstate__()
-        else:
-            state = data.__dict__.copy()
-        return self.represent_mapping(tag, state, flow_style=flow_style)
-
-    def represent_undefined(self, data):
-        raise RepresenterError("cannot represent an object: %s" % data)
-
-SafeRepresenter.add_representer(type(None),
-        SafeRepresenter.represent_none)
-
-SafeRepresenter.add_representer(str,
-        SafeRepresenter.represent_str)
-
-SafeRepresenter.add_representer(unicode,
-        SafeRepresenter.represent_unicode)
-
-SafeRepresenter.add_representer(bool,
-        SafeRepresenter.represent_bool)
-
-SafeRepresenter.add_representer(int,
-        SafeRepresenter.represent_int)
-
-SafeRepresenter.add_representer(long,
-        SafeRepresenter.represent_long)
-
-SafeRepresenter.add_representer(float,
-        SafeRepresenter.represent_float)
-
-SafeRepresenter.add_representer(list,
-        SafeRepresenter.represent_list)
-
-SafeRepresenter.add_representer(tuple,
-        SafeRepresenter.represent_list)
-
-SafeRepresenter.add_representer(dict,
-        SafeRepresenter.represent_dict)
-
-SafeRepresenter.add_representer(set,
-        SafeRepresenter.represent_set)
-
-SafeRepresenter.add_representer(datetime.date,
-        SafeRepresenter.represent_date)
-
-SafeRepresenter.add_representer(datetime.datetime,
-        SafeRepresenter.represent_datetime)
-
-SafeRepresenter.add_representer(None,
-        SafeRepresenter.represent_undefined)
-
-class Representer(SafeRepresenter):
-
-    def represent_str(self, data):
-        tag = None
-        style = None
-        try:
-            data = unicode(data, 'ascii')
-            tag = u'tag:yaml.org,2002:str'
-        except UnicodeDecodeError:
-            try:
-                data = unicode(data, 'utf-8')
-                tag = u'tag:yaml.org,2002:python/str'
-            except UnicodeDecodeError:
-                data = data.encode('base64')
-                tag = u'tag:yaml.org,2002:binary'
-                style = '|'
-        return self.represent_scalar(tag, data, style=style)
-
-    def represent_unicode(self, data):
-        tag = None
-        try:
-            data.encode('ascii')
-            tag = u'tag:yaml.org,2002:python/unicode'
-        except UnicodeEncodeError:
-            tag = u'tag:yaml.org,2002:str'
-        return self.represent_scalar(tag, data)
-
-    def represent_long(self, data):
-        tag = u'tag:yaml.org,2002:int'
-        if int(data) is not data:
-            tag = u'tag:yaml.org,2002:python/long'
-        return self.represent_scalar(tag, unicode(data))
-
-    def represent_complex(self, data):
-        if data.imag == 0.0:
-            data = u'%r' % data.real
-        elif data.real == 0.0:
-            data = u'%rj' % data.imag
-        elif data.imag > 0:
-            data = u'%r+%rj' % (data.real, data.imag)
-        else:
-            data = u'%r%rj' % (data.real, data.imag)
-        return self.represent_scalar(u'tag:yaml.org,2002:python/complex', data)
-
-    def represent_tuple(self, data):
-        return self.represent_sequence(u'tag:yaml.org,2002:python/tuple', data)
-
-    def represent_name(self, data):
-        name = u'%s.%s' % (data.__module__, data.__name__)
-        return self.represent_scalar(u'tag:yaml.org,2002:python/name:'+name, u'')
-
-    def represent_module(self, data):
-        return self.represent_scalar(
-                u'tag:yaml.org,2002:python/module:'+data.__name__, u'')
-
-    def represent_instance(self, data):
-        # For instances of classic classes, we use __getinitargs__ and
-        # __getstate__ to serialize the data.
-
-        # If data.__getinitargs__ exists, the object must be reconstructed by
-        # calling cls(**args), where args is a tuple returned by
-        # __getinitargs__. Otherwise, the cls.__init__ method should never be
-        # called and the class instance is created by instantiating a trivial
-        # class and assigning to the instance's __class__ variable.
-
-        # If data.__getstate__ exists, it returns the state of the object.
-        # Otherwise, the state of the object is data.__dict__.
-
-        # We produce either a !!python/object or !!python/object/new node.
-        # If data.__getinitargs__ does not exist and state is a dictionary, we
-        # produce a !!python/object node . Otherwise we produce a
-        # !!python/object/new node.
-
-        cls = data.__class__
-        class_name = u'%s.%s' % (cls.__module__, cls.__name__)
-        args = None
-        state = None
-        if hasattr(data, '__getinitargs__'):
-            args = list(data.__getinitargs__())
-        if hasattr(data, '__getstate__'):
-            state = data.__getstate__()
-        else:
-            state = data.__dict__
-        if args is None and isinstance(state, dict):
-            return self.represent_mapping(
-                    u'tag:yaml.org,2002:python/object:'+class_name, state)
-        if isinstance(state, dict) and not state:
-            return self.represent_sequence(
-                    u'tag:yaml.org,2002:python/object/new:'+class_name, args)
-        value = {}
-        if args:
-            value['args'] = args
-        value['state'] = state
-        return self.represent_mapping(
-                u'tag:yaml.org,2002:python/object/new:'+class_name, value)
-
-    def represent_object(self, data):
-        # We use __reduce__ API to save the data. data.__reduce__ returns
-        # a tuple of length 2-5:
-        #   (function, args, state, listitems, dictitems)
-
-        # For reconstructing, we calls function(*args), then set its state,
-        # listitems, and dictitems if they are not None.
-
-        # A special case is when function.__name__ == '__newobj__'. In this
-        # case we create the object with args[0].__new__(*args).
-
-        # Another special case is when __reduce__ returns a string - we don't
-        # support it.
-
-        # We produce a !!python/object, !!python/object/new or
-        # !!python/object/apply node.
-
-        cls = type(data)
-        if cls in copy_reg.dispatch_table:
-            reduce = copy_reg.dispatch_table[cls](data)
-        elif hasattr(data, '__reduce_ex__'):
-            reduce = data.__reduce_ex__(2)
-        elif hasattr(data, '__reduce__'):
-            reduce = data.__reduce__()
-        else:
-            raise RepresenterError("cannot represent object: %r" % data)
-        reduce = (list(reduce)+[None]*5)[:5]
-        function, args, state, listitems, dictitems = reduce
-        args = list(args)
-        if state is None:
-            state = {}
-        if listitems is not None:
-            listitems = list(listitems)
-        if dictitems is not None:
-            dictitems = dict(dictitems)
-        if function.__name__ == '__newobj__':
-            function = args[0]
-            args = args[1:]
-            tag = u'tag:yaml.org,2002:python/object/new:'
-            newobj = True
-        else:
-            tag = u'tag:yaml.org,2002:python/object/apply:'
-            newobj = False
-        function_name = u'%s.%s' % (function.__module__, function.__name__)
-        if not args and not listitems and not dictitems \
-                and isinstance(state, dict) and newobj:
-            return self.represent_mapping(
-                    u'tag:yaml.org,2002:python/object:'+function_name, state)
-        if not listitems and not dictitems  \
-                and isinstance(state, dict) and not state:
-            return self.represent_sequence(tag+function_name, args)
-        value = {}
-        if args:
-            value['args'] = args
-        if state or not isinstance(state, dict):
-            value['state'] = state
-        if listitems:
-            value['listitems'] = listitems
-        if dictitems:
-            value['dictitems'] = dictitems
-        return self.represent_mapping(tag+function_name, value)
-
-Representer.add_representer(str,
-        Representer.represent_str)
-
-Representer.add_representer(unicode,
-        Representer.represent_unicode)
-
-Representer.add_representer(long,
-        Representer.represent_long)
-
-Representer.add_representer(complex,
-        Representer.represent_complex)
-
-Representer.add_representer(tuple,
-        Representer.represent_tuple)
-
-Representer.add_representer(type,
-        Representer.represent_name)
-
-Representer.add_representer(types.ClassType,
-        Representer.represent_name)
-
-Representer.add_representer(types.FunctionType,
-        Representer.represent_name)
-
-Representer.add_representer(types.BuiltinFunctionType,
-        Representer.represent_name)
-
-Representer.add_representer(types.ModuleType,
-        Representer.represent_module)
-
-Representer.add_multi_representer(types.InstanceType,
-        Representer.represent_instance)
-
-Representer.add_multi_representer(object,
-        Representer.represent_object)
-
diff --git a/python.d/python_modules/pyyaml2/resolver.py b/python.d/python_modules/pyyaml2/resolver.py
deleted file mode 100644
index 6b5ab875..00000000
--- a/python.d/python_modules/pyyaml2/resolver.py
+++ /dev/null
@@ -1,224 +0,0 @@
-
-__all__ = ['BaseResolver', 'Resolver']
-
-from error import *
-from nodes import *
-
-import re
-
-class ResolverError(YAMLError):
-    pass
-
-class BaseResolver(object):
-
-    DEFAULT_SCALAR_TAG = u'tag:yaml.org,2002:str'
-    DEFAULT_SEQUENCE_TAG = u'tag:yaml.org,2002:seq'
-    DEFAULT_MAPPING_TAG = u'tag:yaml.org,2002:map'
-
-    yaml_implicit_resolvers = {}
-    yaml_path_resolvers = {}
-
-    def __init__(self):
-        self.resolver_exact_paths = []
-        self.resolver_prefix_paths = []
-
-    def add_implicit_resolver(cls, tag, regexp, first):
-        if not 'yaml_implicit_resolvers' in cls.__dict__:
-            cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy()
-        if first is None:
-            first = [None]
-        for ch in first:
-            cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
-    add_implicit_resolver = classmethod(add_implicit_resolver)
-
-    def add_path_resolver(cls, tag, path, kind=None):
-        # Note: `add_path_resolver` is experimental.  The API could be changed.
-        # `new_path` is a pattern that is matched against the path from the
-        # root to the node that is being considered.  `node_path` elements are
-        # tuples `(node_check, index_check)`.  `node_check` is a node class:
-        # `ScalarNode`, `SequenceNode`, `MappingNode` or `None`.  `None`
-        # matches any kind of a node.  `index_check` could be `None`, a boolean
-        # value, a string value, or a number.  `None` and `False` match against
-        # any _value_ of sequence and mapping nodes.  `True` matches against
-        # any _key_ of a mapping node.  A string `index_check` matches against
-        # a mapping value that corresponds to a scalar key which content is
-        # equal to the `index_check` value.  An integer `index_check` matches
-        # against a sequence value with the index equal to `index_check`.
-        if not 'yaml_path_resolvers' in cls.__dict__:
-            cls.yaml_path_resolvers = cls.yaml_path_resolvers.copy()
-        new_path = []
-        for element in path:
-            if isinstance(element, (list, tuple)):
-                if len(element) == 2:
-                    node_check, index_check = element
-                elif len(element) == 1:
-                    node_check = element[0]
-                    index_check = True
-                else:
-                    raise ResolverError("Invalid path element: %s" % element)
-            else:
-                node_check = None
-                index_check = element
-            if node_check is str:
-                node_check = ScalarNode
-            elif node_check is list:
-                node_check = SequenceNode
-            elif node_check is dict:
-                node_check = MappingNode
-            elif node_check not in [ScalarNode, SequenceNode, MappingNode]  \
-                    and not isinstance(node_check, basestring)  \
-                    and node_check is not None:
-                raise ResolverError("Invalid node checker: %s" % node_check)
-            if not isinstance(index_check, (basestring, int))   \
-                    and index_check is not None:
-                raise ResolverError("Invalid index checker: %s" % index_check)
-            new_path.append((node_check, index_check))
-        if kind is str:
-            kind = ScalarNode
-        elif kind is list:
-            kind = SequenceNode
-        elif kind is dict:
-            kind = MappingNode
-        elif kind not in [ScalarNode, SequenceNode, MappingNode]    \
-                and kind is not None:
-            raise ResolverError("Invalid node kind: %s" % kind)
-        cls.yaml_path_resolvers[tuple(new_path), kind] = tag
-    add_path_resolver = classmethod(add_path_resolver)
-
-    def descend_resolver(self, current_node, current_index):
-        if not self.yaml_path_resolvers:
-            return
-        exact_paths = {}
-        prefix_paths = []
-        if current_node:
-            depth = len(self.resolver_prefix_paths)
-            for path, kind in self.resolver_prefix_paths[-1]:
-                if self.check_resolver_prefix(depth, path, kind,
-                        current_node, current_index):
-                    if len(path) > depth:
-                        prefix_paths.append((path, kind))
-                    else:
-                        exact_paths[kind] = self.yaml_path_resolvers[path, kind]
-        else:
-            for path, kind in self.yaml_path_resolvers:
-                if not path:
-                    exact_paths[kind] = self.yaml_path_resolvers[path, kind]
-                else:
-                    prefix_paths.append((path, kind))
-        self.resolver_exact_paths.append(exact_paths)
-        self.resolver_prefix_paths.append(prefix_paths)
-
-    def ascend_resolver(self):
-        if not self.yaml_path_resolvers:
-            return
-        self.resolver_exact_paths.pop()
-        self.resolver_prefix_paths.pop()
-
-    def check_resolver_prefix(self, depth, path, kind,
-            current_node, current_index):
-        node_check, index_check = path[depth-1]
-        if isinstance(node_check, basestring):
-            if current_node.tag != node_check:
-                return
-        elif node_check is not None:
-            if not isinstance(current_node, node_check):
-                return
-        if index_check is True and current_index is not None:
-            return
-        if (index_check is False or index_check is None)    \
-                and current_index is None:
-            return
-        if isinstance(index_check, basestring):
-            if not (isinstance(current_index, ScalarNode)
-                    and index_check == current_index.value):
-                return
-        elif isinstance(index_check, int) and not isinstance(index_check, bool):
-            if index_check != current_index:
-                return
-        return True
-
-    def resolve(self, kind, value, implicit):
-        if kind is ScalarNode and implicit[0]:
-            if value == u'':
-                resolvers = self.yaml_implicit_resolvers.get(u'', [])
-            else:
-                resolvers = self.yaml_implicit_resolvers.get(value[0], [])
-            resolvers += self.yaml_implicit_resolvers.get(None, [])
-            for tag, regexp in resolvers:
-                if regexp.match(value):
-                    return tag
-            implicit = implicit[1]
-        if self.yaml_path_resolvers:
-            exact_paths = self.resolver_exact_paths[-1]
-            if kind in exact_paths:
-                return exact_paths[kind]
-            if None in exact_paths:
-                return exact_paths[None]
-        if kind is ScalarNode:
-            return self.DEFAULT_SCALAR_TAG
-        elif kind is SequenceNode:
-            return self.DEFAULT_SEQUENCE_TAG
-        elif kind is MappingNode:
-            return self.DEFAULT_MAPPING_TAG
-
-class Resolver(BaseResolver):
-    pass
-
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:bool',
-        re.compile(ur'''^(?:yes|Yes|YES|no|No|NO
-                    |true|True|TRUE|false|False|FALSE
-                    |on|On|ON|off|Off|OFF)$''', re.X),
-        list(u'yYnNtTfFoO'))
-
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:float',
-        re.compile(ur'''^(?:[-+]?(?:[0-9][0-9_]*)\.[0-9_]*(?:[eE][-+][0-9]+)?
-                    |\.[0-9_]+(?:[eE][-+][0-9]+)?
-                    |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\.[0-9_]*
-                    |[-+]?\.(?:inf|Inf|INF)
-                    |\.(?:nan|NaN|NAN))$''', re.X),
-        list(u'-+0123456789.'))
-
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:int',
-        re.compile(ur'''^(?:[-+]?0b[0-1_]+
-                    |[-+]?0[0-7_]+
-                    |[-+]?(?:0|[1-9][0-9_]*)
-                    |[-+]?0x[0-9a-fA-F_]+
-                    |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
-        list(u'-+0123456789'))
-
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:merge',
-        re.compile(ur'^(?:<<)$'),
-        [u'<'])
-
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:null',
-        re.compile(ur'''^(?: ~
-                    |null|Null|NULL
-                    | )$''', re.X),
-        [u'~', u'n', u'N', u''])
-
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:timestamp',
-        re.compile(ur'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
-                    |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
-                     (?:[Tt]|[ \t]+)[0-9][0-9]?
-                     :[0-9][0-9] :[0-9][0-9] (?:\.[0-9]*)?
-                     (?:[ \t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
-        list(u'0123456789'))
-
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:value',
-        re.compile(ur'^(?:=)$'),
-        [u'='])
-
-# The following resolver is only for documentation purposes. It cannot work
-# because plain scalars cannot start with '!', '&', or '*'.
-Resolver.add_implicit_resolver(
-        u'tag:yaml.org,2002:yaml',
-        re.compile(ur'^(?:!|&|\*)$'),
-        list(u'!&*'))
-
diff --git a/python.d/python_modules/pyyaml2/scanner.py b/python.d/python_modules/pyyaml2/scanner.py
deleted file mode 100644
index 5228fad6..00000000
--- a/python.d/python_modules/pyyaml2/scanner.py
+++ /dev/null
@@ -1,1457 +0,0 @@
-
-# Scanner produces tokens of the following types:
-# STREAM-START
-# STREAM-END
-# DIRECTIVE(name, value)
-# DOCUMENT-START
-# DOCUMENT-END
-# BLOCK-SEQUENCE-START
-# BLOCK-MAPPING-START
-# BLOCK-END
-# FLOW-SEQUENCE-START
-# FLOW-MAPPING-START
-# FLOW-SEQUENCE-END
-# FLOW-MAPPING-END
-# BLOCK-ENTRY
-# FLOW-ENTRY
-# KEY
-# VALUE
-# ALIAS(value)
-# ANCHOR(value)
-# TAG(value)
-# SCALAR(value, plain, style)
-#
-# Read comments in the Scanner code for more details.
-#
-
-__all__ = ['Scanner', 'ScannerError']
-
-from error import MarkedYAMLError
-from tokens import *
-
-class ScannerError(MarkedYAMLError):
-    pass
-
-class SimpleKey(object):
-    # See below simple keys treatment.
-
-    def __init__(self, token_number, required, index, line, column, mark):
-        self.token_number = token_number
-        self.required = required
-        self.index = index
-        self.line = line
-        self.column = column
-        self.mark = mark
-
-class Scanner(object):
-
-    def __init__(self):
-        """Initialize the scanner."""
-        # It is assumed that Scanner and Reader will have a common descendant.
-        # Reader do the dirty work of checking for BOM and converting the
-        # input data to Unicode. It also adds NUL to the end.
-        #
-        # Reader supports the following methods
-        #   self.peek(i=0)       # peek the next i-th character
-        #   self.prefix(l=1)     # peek the next l characters
-        #   self.forward(l=1)    # read the next l characters and move the pointer.
-
-        # Had we reached the end of the stream?
-        self.done = False
-
-        # The number of unclosed '{' and '['. `flow_level == 0` means block
-        # context.
-        self.flow_level = 0
-
-        # List of processed tokens that are not yet emitted.
-        self.tokens = []
-
-        # Add the STREAM-START token.
-        self.fetch_stream_start()
-
-        # Number of tokens that were emitted through the `get_token` method.
-        self.tokens_taken = 0
-
-        # The current indentation level.
-        self.indent = -1
-
-        # Past indentation levels.
-        self.indents = []
-
-        # Variables related to simple keys treatment.
-
-        # A simple key is a key that is not denoted by the '?' indicator.
-        # Example of simple keys:
-        #   ---
-        #   block simple key: value
-        #   ? not a simple key:
-        #   : { flow simple key: value }
-        # We emit the KEY token before all keys, so when we find a potential
-        # simple key, we try to locate the corresponding ':' indicator.
-        # Simple keys should be limited to a single line and 1024 characters.
-
-        # Can a simple key start at the current position? A simple key may
-        # start:
-        # - at the beginning of the line, not counting indentation spaces
-        #       (in block context),
-        # - after '{', '[', ',' (in the flow context),
-        # - after '?', ':', '-' (in the block context).
-        # In the block context, this flag also signifies if a block collection
-        # may start at the current position.
-        self.allow_simple_key = True
-
-        # Keep track of possible simple keys. This is a dictionary. The key
-        # is `flow_level`; there can be no more that one possible simple key
-        # for each level. The value is a SimpleKey record:
-        #   (token_number, required, index, line, column, mark)
-        # A simple key may start with ALIAS, ANCHOR, TAG, SCALAR(flow),
-        # '[', or '{' tokens.
-        self.possible_simple_keys = {}
-
-    # Public methods.
-
-    def check_token(self, *choices):
-        # Check if the next token is one of the given types.
-        while self.need_more_tokens():
-            self.fetch_more_tokens()
-        if self.tokens:
-            if not choices:
-                return True
-            for choice in choices:
-                if isinstance(self.tokens[0], choice):
-                    return True
-        return False
-
-    def peek_token(self):
-        # Return the next token, but do not delete if from the queue.
-        while self.need_more_tokens():
-            self.fetch_more_tokens()
-        if self.tokens:
-            return self.tokens[0]
-
-    def get_token(self):
-        # Return the next token.
-        while self.need_more_tokens():
-            self.fetch_more_tokens()
-        if self.tokens:
-            self.tokens_taken += 1
-            return self.tokens.pop(0)
-
-    # Private methods.
-
-    def need_more_tokens(self):
-        if self.done:
-            return False
-        if not self.tokens:
-            return True
-        # The current token may be a potential simple key, so we
-        # need to look further.
-        self.stale_possible_simple_keys()
-        if self.next_possible_simple_key() == self.tokens_taken:
-            return True
-
-    def fetch_more_tokens(self):
-
-        # Eat whitespaces and comments until we reach the next token.
-        self.scan_to_next_token()
-
-        # Remove obsolete possible simple keys.
-        self.stale_possible_simple_keys()
-
-        # Compare the current indentation and column. It may add some tokens
-        # and decrease the current indentation level.
-        self.unwind_indent(self.column)
-
-        # Peek the next character.
-        ch = self.peek()
-
-        # Is it the end of stream?
-        if ch == u'\0':
-            return self.fetch_stream_end()
-
-        # Is it a directive?
-        if ch == u'%' and self.check_directive():
-            return self.fetch_directive()
-
-        # Is it the document start?
-        if ch == u'-' and self.check_document_start():
-            return self.fetch_document_start()
-
-        # Is it the document end?
-        if ch == u'.' and self.check_document_end():
-            return self.fetch_document_end()
-
-        # TODO: support for BOM within a stream.
-        #if ch == u'\uFEFF':
-        #    return self.fetch_bom()    <-- issue BOMToken
-
-        # Note: the order of the following checks is NOT significant.
-
-        # Is it the flow sequence start indicator?
-        if ch == u'[':
-            return self.fetch_flow_sequence_start()
-
-        # Is it the flow mapping start indicator?
-        if ch == u'{':
-            return self.fetch_flow_mapping_start()
-
-        # Is it the flow sequence end indicator?
-        if ch == u']':
-            return self.fetch_flow_sequence_end()
-
-        # Is it the flow mapping end indicator?
-        if ch == u'}':
-            return self.fetch_flow_mapping_end()
-
-        # Is it the flow entry indicator?
-        if ch == u',':
-            return self.fetch_flow_entry()
-
-        # Is it the block entry indicator?
-        if ch == u'-' and self.check_block_entry():
-            return self.fetch_block_entry()
-
-        # Is it the key indicator?
-        if ch == u'?' and self.check_key():
-            return self.fetch_key()
-
-        # Is it the value indicator?
-        if ch == u':' and self.check_value():
-            return self.fetch_value()
-
-        # Is it an alias?
-        if ch == u'*':
-            return self.fetch_alias()
-
-        # Is it an anchor?
-        if ch == u'&':
-            return self.fetch_anchor()
-
-        # Is it a tag?
-        if ch == u'!':
-            return self.fetch_tag()
-
-        # Is it a literal scalar?
-        if ch == u'|' and not self.flow_level:
-            return self.fetch_literal()
-
-        # Is it a folded scalar?
-        if ch == u'>' and not self.flow_level:
-            return self.fetch_folded()
-
-        # Is it a single quoted scalar?
-        if ch == u'\'':
-            return self.fetch_single()
-
-        # Is it a double quoted scalar?
-        if ch == u'\"':
-            return self.fetch_double()
-
-        # It must be a plain scalar then.
-        if self.check_plain():
-            return self.fetch_plain()
-
-        # No? It's an error. Let's produce a nice error message.
-        raise ScannerError("while scanning for the next token", None,
-                "found character %r that cannot start any token"
-                % ch.encode('utf-8'), self.get_mark())
-
-    # Simple keys treatment.
-
-    def next_possible_simple_key(self):
-        # Return the number of the nearest possible simple key. Actually we
-        # don't need to loop through the whole dictionary. We may replace it
-        # with the following code:
-        #   if not self.possible_simple_keys:
-        #       return None
-        #   return self.possible_simple_keys[
-        #           min(self.possible_simple_keys.keys())].token_number
-        min_token_number = None
-        for level in self.possible_simple_keys:
-            key = self.possible_simple_keys[level]
-            if min_token_number is None or key.token_number < min_token_number:
-                min_token_number = key.token_number
-        return min_token_number
-
-    def stale_possible_simple_keys(self):
-        # Remove entries that are no longer possible simple keys. According to
-        # the YAML specification, simple keys
-        # - should be limited to a single line,
-        # - should be no longer than 1024 characters.
-        # Disabling this procedure will allow simple keys of any length and
-        # height (may cause problems if indentation is broken though).
-        for level in self.possible_simple_keys.keys():
-            key = self.possible_simple_keys[level]
-            if key.line != self.line  \
-                    or self.index-key.index > 1024:
-                if key.required:
-                    raise ScannerError("while scanning a simple key", key.mark,
-                            "could not found expected ':'", self.get_mark())
-                del self.possible_simple_keys[level]
-
-    def save_possible_simple_key(self):
-        # The next token may start a simple key. We check if it's possible
-        # and save its position. This function is called for
-        #   ALIAS, ANCHOR, TAG, SCALAR(flow), '[', and '{'.
-
-        # Check if a simple key is required at the current position.
-        required = not self.flow_level and self.indent == self.column
-
-        # A simple key is required only if it is the first token in the current
-        # line. Therefore it is always allowed.
-        assert self.allow_simple_key or not required
-
-        # The next token might be a simple key. Let's save it's number and
-        # position.
-        if self.allow_simple_key:
-            self.remove_possible_simple_key()
-            token_number = self.tokens_taken+len(self.tokens)
-            key = SimpleKey(token_number, required,
-                    self.index, self.line, self.column, self.get_mark())
-            self.possible_simple_keys[self.flow_level] = key
-
-    def remove_possible_simple_key(self):
-        # Remove the saved possible key position at the current flow level.
-        if self.flow_level in self.possible_simple_keys:
-            key = self.possible_simple_keys[self.flow_level]
-            
-            if key.required:
-                raise ScannerError("while scanning a simple key", key.mark,
-                        "could not found expected ':'", self.get_mark())
-
-            del self.possible_simple_keys[self.flow_level]
-
-    # Indentation functions.
-
-    def unwind_indent(self, column):
-
-        ## In flow context, tokens should respect indentation.
-        ## Actually the condition should be `self.indent >= column` according to
-        ## the spec. But this condition will prohibit intuitively correct
-        ## constructions such as
-        ## key : {
-        ## }
-        #if self.flow_level and self.indent > column:
-        #    raise ScannerError(None, None,
-        #            "invalid intendation or unclosed '[' or '{'",
-        #            self.get_mark())
-
-        # In the flow context, indentation is ignored. We make the scanner less
-        # restrictive then specification requires.
-        if self.flow_level:
-            return
-
-        # In block context, we may need to issue the BLOCK-END tokens.
-        while self.indent > column:
-            mark = self.get_mark()
-            self.indent = self.indents.pop()
-            self.tokens.append(BlockEndToken(mark, mark))
-
-    def add_indent(self, column):
-        # Check if we need to increase indentation.
-        if self.indent < column:
-            self.indents.append(self.indent)
-            self.indent = column
-            return True
-        return False
-
-    # Fetchers.
-
-    def fetch_stream_start(self):
-        # We always add STREAM-START as the first token and STREAM-END as the
-        # last token.
-
-        # Read the token.
-        mark = self.get_mark()
-        
-        # Add STREAM-START.
-        self.tokens.append(StreamStartToken(mark, mark,
-            encoding=self.encoding))
-        
-
-    def fetch_stream_end(self):
-
-        # Set the current intendation to -1.
-        self.unwind_indent(-1)
-
-        # Reset simple keys.
-        self.remove_possible_simple_key()
-        self.allow_simple_key = False
-        self.possible_simple_keys = {}
-
-        # Read the token.
-        mark = self.get_mark()
-        
-        # Add STREAM-END.
-        self.tokens.append(StreamEndToken(mark, mark))
-
-        # The steam is finished.
-        self.done = True
-
-    def fetch_directive(self):
-        
-        # Set the current intendation to -1.
-        self.unwind_indent(-1)
-
-        # Reset simple keys.
-        self.remove_possible_simple_key()
-        self.allow_simple_key = False
-
-        # Scan and add DIRECTIVE.
-        self.tokens.append(self.scan_directive())
-
-    def fetch_document_start(self):
-        self.fetch_document_indicator(DocumentStartToken)
-
-    def fetch_document_end(self):
-        self.fetch_document_indicator(DocumentEndToken)
-
-    def fetch_document_indicator(self, TokenClass):
-
-        # Set the current intendation to -1.
-        self.unwind_indent(-1)
-
-        # Reset simple keys. Note that there could not be a block collection
-        # after '---'.
-        self.remove_possible_simple_key()
-        self.allow_simple_key = False
-
-        # Add DOCUMENT-START or DOCUMENT-END.
-        start_mark = self.get_mark()
-        self.forward(3)
-        end_mark = self.get_mark()
-        self.tokens.append(TokenClass(start_mark, end_mark))
-
-    def fetch_flow_sequence_start(self):
-        self.fetch_flow_collection_start(FlowSequenceStartToken)
-
-    def fetch_flow_mapping_start(self):
-        self.fetch_flow_collection_start(FlowMappingStartToken)
-
-    def fetch_flow_collection_start(self, TokenClass):
-
-        # '[' and '{' may start a simple key.
-        self.save_possible_simple_key()
-
-        # Increase the flow level.
-        self.flow_level += 1
-
-        # Simple keys are allowed after '[' and '{'.
-        self.allow_simple_key = True
-
-        # Add FLOW-SEQUENCE-START or FLOW-MAPPING-START.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(TokenClass(start_mark, end_mark))
-
-    def fetch_flow_sequence_end(self):
-        self.fetch_flow_collection_end(FlowSequenceEndToken)
-
-    def fetch_flow_mapping_end(self):
-        self.fetch_flow_collection_end(FlowMappingEndToken)
-
-    def fetch_flow_collection_end(self, TokenClass):
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Decrease the flow level.
-        self.flow_level -= 1
-
-        # No simple keys after ']' or '}'.
-        self.allow_simple_key = False
-
-        # Add FLOW-SEQUENCE-END or FLOW-MAPPING-END.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(TokenClass(start_mark, end_mark))
-
-    def fetch_flow_entry(self):
-
-        # Simple keys are allowed after ','.
-        self.allow_simple_key = True
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Add FLOW-ENTRY.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(FlowEntryToken(start_mark, end_mark))
-
-    def fetch_block_entry(self):
-
-        # Block context needs additional checks.
-        if not self.flow_level:
-
-            # Are we allowed to start a new entry?
-            if not self.allow_simple_key:
-                raise ScannerError(None, None,
-                        "sequence entries are not allowed here",
-                        self.get_mark())
-
-            # We may need to add BLOCK-SEQUENCE-START.
-            if self.add_indent(self.column):
-                mark = self.get_mark()
-                self.tokens.append(BlockSequenceStartToken(mark, mark))
-
-        # It's an error for the block entry to occur in the flow context,
-        # but we let the parser detect this.
-        else:
-            pass
-
-        # Simple keys are allowed after '-'.
-        self.allow_simple_key = True
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Add BLOCK-ENTRY.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(BlockEntryToken(start_mark, end_mark))
-
-    def fetch_key(self):
-        
-        # Block context needs additional checks.
-        if not self.flow_level:
-
-            # Are we allowed to start a key (not nessesary a simple)?
-            if not self.allow_simple_key:
-                raise ScannerError(None, None,
-                        "mapping keys are not allowed here",
-                        self.get_mark())
-
-            # We may need to add BLOCK-MAPPING-START.
-            if self.add_indent(self.column):
-                mark = self.get_mark()
-                self.tokens.append(BlockMappingStartToken(mark, mark))
-
-        # Simple keys are allowed after '?' in the block context.
-        self.allow_simple_key = not self.flow_level
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Add KEY.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(KeyToken(start_mark, end_mark))
-
-    def fetch_value(self):
-
-        # Do we determine a simple key?
-        if self.flow_level in self.possible_simple_keys:
-
-            # Add KEY.
-            key = self.possible_simple_keys[self.flow_level]
-            del self.possible_simple_keys[self.flow_level]
-            self.tokens.insert(key.token_number-self.tokens_taken,
-                    KeyToken(key.mark, key.mark))
-
-            # If this key starts a new block mapping, we need to add
-            # BLOCK-MAPPING-START.
-            if not self.flow_level:
-                if self.add_indent(key.column):
-                    self.tokens.insert(key.token_number-self.tokens_taken,
-                            BlockMappingStartToken(key.mark, key.mark))
-
-            # There cannot be two simple keys one after another.
-            self.allow_simple_key = False
-
-        # It must be a part of a complex key.
-        else:
-            
-            # Block context needs additional checks.
-            # (Do we really need them? They will be catched by the parser
-            # anyway.)
-            if not self.flow_level:
-
-                # We are allowed to start a complex value if and only if
-                # we can start a simple key.
-                if not self.allow_simple_key:
-                    raise ScannerError(None, None,
-                            "mapping values are not allowed here",
-                            self.get_mark())
-
-            # If this value starts a new block mapping, we need to add
-            # BLOCK-MAPPING-START.  It will be detected as an error later by
-            # the parser.
-            if not self.flow_level:
-                if self.add_indent(self.column):
-                    mark = self.get_mark()
-                    self.tokens.append(BlockMappingStartToken(mark, mark))
-
-            # Simple keys are allowed after ':' in the block context.
-            self.allow_simple_key = not self.flow_level
-
-            # Reset possible simple key on the current level.
-            self.remove_possible_simple_key()
-
-        # Add VALUE.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(ValueToken(start_mark, end_mark))
-
-    def fetch_alias(self):
-
-        # ALIAS could be a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after ALIAS.
-        self.allow_simple_key = False
-
-        # Scan and add ALIAS.
-        self.tokens.append(self.scan_anchor(AliasToken))
-
-    def fetch_anchor(self):
-
-        # ANCHOR could start a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after ANCHOR.
-        self.allow_simple_key = False
-
-        # Scan and add ANCHOR.
-        self.tokens.append(self.scan_anchor(AnchorToken))
-
-    def fetch_tag(self):
-
-        # TAG could start a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after TAG.
-        self.allow_simple_key = False
-
-        # Scan and add TAG.
-        self.tokens.append(self.scan_tag())
-
-    def fetch_literal(self):
-        self.fetch_block_scalar(style='|')
-
-    def fetch_folded(self):
-        self.fetch_block_scalar(style='>')
-
-    def fetch_block_scalar(self, style):
-
-        # A simple key may follow a block scalar.
-        self.allow_simple_key = True
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Scan and add SCALAR.
-        self.tokens.append(self.scan_block_scalar(style))
-
-    def fetch_single(self):
-        self.fetch_flow_scalar(style='\'')
-
-    def fetch_double(self):
-        self.fetch_flow_scalar(style='"')
-
-    def fetch_flow_scalar(self, style):
-
-        # A flow scalar could be a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after flow scalars.
-        self.allow_simple_key = False
-
-        # Scan and add SCALAR.
-        self.tokens.append(self.scan_flow_scalar(style))
-
-    def fetch_plain(self):
-
-        # A plain scalar could be a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after plain scalars. But note that `scan_plain` will
-        # change this flag if the scan is finished at the beginning of the
-        # line.
-        self.allow_simple_key = False
-
-        # Scan and add SCALAR. May change `allow_simple_key`.
-        self.tokens.append(self.scan_plain())
-
-    # Checkers.
-
-    def check_directive(self):
-
-        # DIRECTIVE:        ^ '%' ...
-        # The '%' indicator is already checked.
-        if self.column == 0:
-            return True
-
-    def check_document_start(self):
-
-        # DOCUMENT-START:   ^ '---' (' '|'\n')
-        if self.column == 0:
-            if self.prefix(3) == u'---'  \
-                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
-                return True
-
-    def check_document_end(self):
-
-        # DOCUMENT-END:     ^ '...' (' '|'\n')
-        if self.column == 0:
-            if self.prefix(3) == u'...'  \
-                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
-                return True
-
-    def check_block_entry(self):
-
-        # BLOCK-ENTRY:      '-' (' '|'\n')
-        return self.peek(1) in u'\0 \t\r\n\x85\u2028\u2029'
-
-    def check_key(self):
-
-        # KEY(flow context):    '?'
-        if self.flow_level:
-            return True
-
-        # KEY(block context):   '?' (' '|'\n')
-        else:
-            return self.peek(1) in u'\0 \t\r\n\x85\u2028\u2029'
-
-    def check_value(self):
-
-        # VALUE(flow context):  ':'
-        if self.flow_level:
-            return True
-
-        # VALUE(block context): ':' (' '|'\n')
-        else:
-            return self.peek(1) in u'\0 \t\r\n\x85\u2028\u2029'
-
-    def check_plain(self):
-
-        # A plain scalar may start with any non-space character except:
-        #   '-', '?', ':', ',', '[', ']', '{', '}',
-        #   '#', '&', '*', '!', '|', '>', '\'', '\"',
-        #   '%', '@', '`'.
-        #
-        # It may also start with
-        #   '-', '?', ':'
-        # if it is followed by a non-space character.
-        #
-        # Note that we limit the last rule to the block context (except the
-        # '-' character) because we want the flow context to be space
-        # independent.
-        ch = self.peek()
-        return ch not in u'\0 \t\r\n\x85\u2028\u2029-?:,[]{}#&*!|>\'\"%@`'  \
-                or (self.peek(1) not in u'\0 \t\r\n\x85\u2028\u2029'
-                        and (ch == u'-' or (not self.flow_level and ch in u'?:')))
-
-    # Scanners.
-
-    def scan_to_next_token(self):
-        # We ignore spaces, line breaks and comments.
-        # If we find a line break in the block context, we set the flag
-        # `allow_simple_key` on.
-        # The byte order mark is stripped if it's the first character in the
-        # stream. We do not yet support BOM inside the stream as the
-        # specification requires. Any such mark will be considered as a part
-        # of the document.
-        #
-        # TODO: We need to make tab handling rules more sane. A good rule is
-        #   Tabs cannot precede tokens
-        #   BLOCK-SEQUENCE-START, BLOCK-MAPPING-START, BLOCK-END,
-        #   KEY(block), VALUE(block), BLOCK-ENTRY
-        # So the checking code is
-        #   if <TAB>:
-        #       self.allow_simple_keys = False
-        # We also need to add the check for `allow_simple_keys == True` to
-        # `unwind_indent` before issuing BLOCK-END.
-        # Scanners for block, flow, and plain scalars need to be modified.
-
-        if self.index == 0 and self.peek() == u'\uFEFF':
-            self.forward()
-        found = False
-        while not found:
-            while self.peek() == u' ':
-                self.forward()
-            if self.peek() == u'#':
-                while self.peek() not in u'\0\r\n\x85\u2028\u2029':
-                    self.forward()
-            if self.scan_line_break():
-                if not self.flow_level:
-                    self.allow_simple_key = True
-            else:
-                found = True
-
-    def scan_directive(self):
-        # See the specification for details.
-        start_mark = self.get_mark()
-        self.forward()
-        name = self.scan_directive_name(start_mark)
-        value = None
-        if name == u'YAML':
-            value = self.scan_yaml_directive_value(start_mark)
-            end_mark = self.get_mark()
-        elif name == u'TAG':
-            value = self.scan_tag_directive_value(start_mark)
-            end_mark = self.get_mark()
-        else:
-            end_mark = self.get_mark()
-            while self.peek() not in u'\0\r\n\x85\u2028\u2029':
-                self.forward()
-        self.scan_directive_ignored_line(start_mark)
-        return DirectiveToken(name, value, start_mark, end_mark)
-
-    def scan_directive_name(self, start_mark):
-        # See the specification for details.
-        length = 0
-        ch = self.peek(length)
-        while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
-                or ch in u'-_':
-            length += 1
-            ch = self.peek(length)
-        if not length:
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch.encode('utf-8'), self.get_mark())
-        value = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch not in u'\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch.encode('utf-8'), self.get_mark())
-        return value
-
-    def scan_yaml_directive_value(self, start_mark):
-        # See the specification for details.
-        while self.peek() == u' ':
-            self.forward()
-        major = self.scan_yaml_directive_number(start_mark)
-        if self.peek() != '.':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a digit or '.', but found %r"
-                    % self.peek().encode('utf-8'),
-                    self.get_mark())
-        self.forward()
-        minor = self.scan_yaml_directive_number(start_mark)
-        if self.peek() not in u'\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a digit or ' ', but found %r"
-                    % self.peek().encode('utf-8'),
-                    self.get_mark())
-        return (major, minor)
-
-    def scan_yaml_directive_number(self, start_mark):
-        # See the specification for details.
-        ch = self.peek()
-        if not (u'0' <= ch <= u'9'):
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a digit, but found %r" % ch.encode('utf-8'),
-                    self.get_mark())
-        length = 0
-        while u'0' <= self.peek(length) <= u'9':
-            length += 1
-        value = int(self.prefix(length))
-        self.forward(length)
-        return value
-
-    def scan_tag_directive_value(self, start_mark):
-        # See the specification for details.
-        while self.peek() == u' ':
-            self.forward()
-        handle = self.scan_tag_directive_handle(start_mark)
-        while self.peek() == u' ':
-            self.forward()
-        prefix = self.scan_tag_directive_prefix(start_mark)
-        return (handle, prefix)
-
-    def scan_tag_directive_handle(self, start_mark):
-        # See the specification for details.
-        value = self.scan_tag_handle('directive', start_mark)
-        ch = self.peek()
-        if ch != u' ':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected ' ', but found %r" % ch.encode('utf-8'),
-                    self.get_mark())
-        return value
-
-    def scan_tag_directive_prefix(self, start_mark):
-        # See the specification for details.
-        value = self.scan_tag_uri('directive', start_mark)
-        ch = self.peek()
-        if ch not in u'\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected ' ', but found %r" % ch.encode('utf-8'),
-                    self.get_mark())
-        return value
-
-    def scan_directive_ignored_line(self, start_mark):
-        # See the specification for details.
-        while self.peek() == u' ':
-            self.forward()
-        if self.peek() == u'#':
-            while self.peek() not in u'\0\r\n\x85\u2028\u2029':
-                self.forward()
-        ch = self.peek()
-        if ch not in u'\0\r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a comment or a line break, but found %r"
-                        % ch.encode('utf-8'), self.get_mark())
-        self.scan_line_break()
-
-    def scan_anchor(self, TokenClass):
-        # The specification does not restrict characters for anchors and
-        # aliases. This may lead to problems, for instance, the document:
-        #   [ *alias, value ]
-        # can be interpteted in two ways, as
-        #   [ "value" ]
-        # and
-        #   [ *alias , "value" ]
-        # Therefore we restrict aliases to numbers and ASCII letters.
-        start_mark = self.get_mark()
-        indicator = self.peek()
-        if indicator == u'*':
-            name = 'alias'
-        else:
-            name = 'anchor'
-        self.forward()
-        length = 0
-        ch = self.peek(length)
-        while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
-                or ch in u'-_':
-            length += 1
-            ch = self.peek(length)
-        if not length:
-            raise ScannerError("while scanning an %s" % name, start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch.encode('utf-8'), self.get_mark())
-        value = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch not in u'\0 \t\r\n\x85\u2028\u2029?:,]}%@`':
-            raise ScannerError("while scanning an %s" % name, start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch.encode('utf-8'), self.get_mark())
-        end_mark = self.get_mark()
-        return TokenClass(value, start_mark, end_mark)
-
-    def scan_tag(self):
-        # See the specification for details.
-        start_mark = self.get_mark()
-        ch = self.peek(1)
-        if ch == u'<':
-            handle = None
-            self.forward(2)
-            suffix = self.scan_tag_uri('tag', start_mark)
-            if self.peek() != u'>':
-                raise ScannerError("while parsing a tag", start_mark,
-                        "expected '>', but found %r" % self.peek().encode('utf-8'),
-                        self.get_mark())
-            self.forward()
-        elif ch in u'\0 \t\r\n\x85\u2028\u2029':
-            handle = None
-            suffix = u'!'
-            self.forward()
-        else:
-            length = 1
-            use_handle = False
-            while ch not in u'\0 \r\n\x85\u2028\u2029':
-                if ch == u'!':
-                    use_handle = True
-                    break
-                length += 1
-                ch = self.peek(length)
-            handle = u'!'
-            if use_handle:
-                handle = self.scan_tag_handle('tag', start_mark)
-            else:
-                handle = u'!'
-                self.forward()
-            suffix = self.scan_tag_uri('tag', start_mark)
-        ch = self.peek()
-        if ch not in u'\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a tag", start_mark,
-                    "expected ' ', but found %r" % ch.encode('utf-8'),
-                    self.get_mark())
-        value = (handle, suffix)
-        end_mark = self.get_mark()
-        return TagToken(value, start_mark, end_mark)
-
-    def scan_block_scalar(self, style):
-        # See the specification for details.
-
-        if style == '>':
-            folded = True
-        else:
-            folded = False
-
-        chunks = []
-        start_mark = self.get_mark()
-
-        # Scan the header.
-        self.forward()
-        chomping, increment = self.scan_block_scalar_indicators(start_mark)
-        self.scan_block_scalar_ignored_line(start_mark)
-
-        # Determine the indentation level and go to the first non-empty line.
-        min_indent = self.indent+1
-        if min_indent < 1:
-            min_indent = 1
-        if increment is None:
-            breaks, max_indent, end_mark = self.scan_block_scalar_indentation()
-            indent = max(min_indent, max_indent)
-        else:
-            indent = min_indent+increment-1
-            breaks, end_mark = self.scan_block_scalar_breaks(indent)
-        line_break = u''
-
-        # Scan the inner part of the block scalar.
-        while self.column == indent and self.peek() != u'\0':
-            chunks.extend(breaks)
-            leading_non_space = self.peek() not in u' \t'
-            length = 0
-            while self.peek(length) not in u'\0\r\n\x85\u2028\u2029':
-                length += 1
-            chunks.append(self.prefix(length))
-            self.forward(length)
-            line_break = self.scan_line_break()
-            breaks, end_mark = self.scan_block_scalar_breaks(indent)
-            if self.column == indent and self.peek() != u'\0':
-
-                # Unfortunately, folding rules are ambiguous.
-                #
-                # This is the folding according to the specification:
-                
-                if folded and line_break == u'\n'   \
-                        and leading_non_space and self.peek() not in u' \t':
-                    if not breaks:
-                        chunks.append(u' ')
-                else:
-                    chunks.append(line_break)
-                
-                # This is Clark Evans's interpretation (also in the spec
-                # examples):
-                #
-                #if folded and line_break == u'\n':
-                #    if not breaks:
-                #        if self.peek() not in ' \t':
-                #            chunks.append(u' ')
-                #        else:
-                #            chunks.append(line_break)
-                #else:
-                #    chunks.append(line_break)
-            else:
-                break
-
-        # Chomp the tail.
-        if chomping is not False:
-            chunks.append(line_break)
-        if chomping is True:
-            chunks.extend(breaks)
-
-        # We are done.
-        return ScalarToken(u''.join(chunks), False, start_mark, end_mark,
-                style)
-
-    def scan_block_scalar_indicators(self, start_mark):
-        # See the specification for details.
-        chomping = None
-        increment = None
-        ch = self.peek()
-        if ch in u'+-':
-            if ch == '+':
-                chomping = True
-            else:
-                chomping = False
-            self.forward()
-            ch = self.peek()
-            if ch in u'0123456789':
-                increment = int(ch)
-                if increment == 0:
-                    raise ScannerError("while scanning a block scalar", start_mark,
-                            "expected indentation indicator in the range 1-9, but found 0",
-                            self.get_mark())
-                self.forward()
-        elif ch in u'0123456789':
-            increment = int(ch)
-            if increment == 0:
-                raise ScannerError("while scanning a block scalar", start_mark,
-                        "expected indentation indicator in the range 1-9, but found 0",
-                        self.get_mark())
-            self.forward()
-            ch = self.peek()
-            if ch in u'+-':
-                if ch == '+':
-                    chomping = True
-                else:
-                    chomping = False
-                self.forward()
-        ch = self.peek()
-        if ch not in u'\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a block scalar", start_mark,
-                    "expected chomping or indentation indicators, but found %r"
-                        % ch.encode('utf-8'), self.get_mark())
-        return chomping, increment
-
-    def scan_block_scalar_ignored_line(self, start_mark):
-        # See the specification for details.
-        while self.peek() == u' ':
-            self.forward()
-        if self.peek() == u'#':
-            while self.peek() not in u'\0\r\n\x85\u2028\u2029':
-                self.forward()
-        ch = self.peek()
-        if ch not in u'\0\r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a block scalar", start_mark,
-                    "expected a comment or a line break, but found %r"
-                        % ch.encode('utf-8'), self.get_mark())
-        self.scan_line_break()
-
-    def scan_block_scalar_indentation(self):
-        # See the specification for details.
-        chunks = []
-        max_indent = 0
-        end_mark = self.get_mark()
-        while self.peek() in u' \r\n\x85\u2028\u2029':
-            if self.peek() != u' ':
-                chunks.append(self.scan_line_break())
-                end_mark = self.get_mark()
-            else:
-                self.forward()
-                if self.column > max_indent:
-                    max_indent = self.column
-        return chunks, max_indent, end_mark
-
-    def scan_block_scalar_breaks(self, indent):
-        # See the specification for details.
-        chunks = []
-        end_mark = self.get_mark()
-        while self.column < indent and self.peek() == u' ':
-            self.forward()
-        while self.peek() in u'\r\n\x85\u2028\u2029':
-            chunks.append(self.scan_line_break())
-            end_mark = self.get_mark()
-            while self.column < indent and self.peek() == u' ':
-                self.forward()
-        return chunks, end_mark
-
-    def scan_flow_scalar(self, style):
-        # See the specification for details.
-        # Note that we loose indentation rules for quoted scalars. Quoted
-        # scalars don't need to adhere indentation because " and ' clearly
-        # mark the beginning and the end of them. Therefore we are less
-        # restrictive then the specification requires. We only need to check
-        # that document separators are not included in scalars.
-        if style == '"':
-            double = True
-        else:
-            double = False
-        chunks = []
-        start_mark = self.get_mark()
-        quote = self.peek()
-        self.forward()
-        chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
-        while self.peek() != quote:
-            chunks.extend(self.scan_flow_scalar_spaces(double, start_mark))
-            chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
-        self.forward()
-        end_mark = self.get_mark()
-        return ScalarToken(u''.join(chunks), False, start_mark, end_mark,
-                style)
-
-    ESCAPE_REPLACEMENTS = {
-        u'0':   u'\0',
-        u'a':   u'\x07',
-        u'b':   u'\x08',
-        u't':   u'\x09',
-        u'\t':  u'\x09',
-        u'n':   u'\x0A',
-        u'v':   u'\x0B',
-        u'f':   u'\x0C',
-        u'r':   u'\x0D',
-        u'e':   u'\x1B',
-        u' ':   u'\x20',
-        u'\"':  u'\"',
-        u'\\':  u'\\',
-        u'N':   u'\x85',
-        u'_':   u'\xA0',
-        u'L':   u'\u2028',
-        u'P':   u'\u2029',
-    }
-
-    ESCAPE_CODES = {
-        u'x':   2,
-        u'u':   4,
-        u'U':   8,
-    }
-
-    def scan_flow_scalar_non_spaces(self, double, start_mark):
-        # See the specification for details.
-        chunks = []
-        while True:
-            length = 0
-            while self.peek(length) not in u'\'\"\\\0 \t\r\n\x85\u2028\u2029':
-                length += 1
-            if length:
-                chunks.append(self.prefix(length))
-                self.forward(length)
-            ch = self.peek()
-            if not double and ch == u'\'' and self.peek(1) == u'\'':
-                chunks.append(u'\'')
-                self.forward(2)
-            elif (double and ch == u'\'') or (not double and ch in u'\"\\'):
-                chunks.append(ch)
-                self.forward()
-            elif double and ch == u'\\':
-                self.forward()
-                ch = self.peek()
-                if ch in self.ESCAPE_REPLACEMENTS:
-                    chunks.append(self.ESCAPE_REPLACEMENTS[ch])
-                    self.forward()
-                elif ch in self.ESCAPE_CODES:
-                    length = self.ESCAPE_CODES[ch]
-                    self.forward()
-                    for k in range(length):
-                        if self.peek(k) not in u'0123456789ABCDEFabcdef':
-                            raise ScannerError("while scanning a double-quoted scalar", start_mark,
-                                    "expected escape sequence of %d hexdecimal numbers, but found %r" %
-                                        (length, self.peek(k).encode('utf-8')), self.get_mark())
-                    code = int(self.prefix(length), 16)
-                    chunks.append(unichr(code))
-                    self.forward(length)
-                elif ch in u'\r\n\x85\u2028\u2029':
-                    self.scan_line_break()
-                    chunks.extend(self.scan_flow_scalar_breaks(double, start_mark))
-                else:
-                    raise ScannerError("while scanning a double-quoted scalar", start_mark,
-                            "found unknown escape character %r" % ch.encode('utf-8'), self.get_mark())
-            else:
-                return chunks
-
-    def scan_flow_scalar_spaces(self, double, start_mark):
-        # See the specification for details.
-        chunks = []
-        length = 0
-        while self.peek(length) in u' \t':
-            length += 1
-        whitespaces = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch == u'\0':
-            raise ScannerError("while scanning a quoted scalar", start_mark,
-                    "found unexpected end of stream", self.get_mark())
-        elif ch in u'\r\n\x85\u2028\u2029':
-            line_break = self.scan_line_break()
-            breaks = self.scan_flow_scalar_breaks(double, start_mark)
-            if line_break != u'\n':
-                chunks.append(line_break)
-            elif not breaks:
-                chunks.append(u' ')
-            chunks.extend(breaks)
-        else:
-            chunks.append(whitespaces)
-        return chunks
-
-    def scan_flow_scalar_breaks(self, double, start_mark):
-        # See the specification for details.
-        chunks = []
-        while True:
-            # Instead of checking indentation, we check for document
-            # separators.
-            prefix = self.prefix(3)
-            if (prefix == u'---' or prefix == u'...')   \
-                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
-                raise ScannerError("while scanning a quoted scalar", start_mark,
-                        "found unexpected document separator", self.get_mark())
-            while self.peek() in u' \t':
-                self.forward()
-            if self.peek() in u'\r\n\x85\u2028\u2029':
-                chunks.append(self.scan_line_break())
-            else:
-                return chunks
-
-    def scan_plain(self):
-        # See the specification for details.
-        # We add an additional restriction for the flow context:
-        #   plain scalars in the flow context cannot contain ',', ':' and '?'.
-        # We also keep track of the `allow_simple_key` flag here.
-        # Indentation rules are loosed for the flow context.
-        chunks = []
-        start_mark = self.get_mark()
-        end_mark = start_mark
-        indent = self.indent+1
-        # We allow zero indentation for scalars, but then we need to check for
-        # document separators at the beginning of the line.
-        #if indent == 0:
-        #    indent = 1
-        spaces = []
-        while True:
-            length = 0
-            if self.peek() == u'#':
-                break
-            while True:
-                ch = self.peek(length)
-                if ch in u'\0 \t\r\n\x85\u2028\u2029'   \
-                        or (not self.flow_level and ch == u':' and
-                                self.peek(length+1) in u'\0 \t\r\n\x85\u2028\u2029') \
-                        or (self.flow_level and ch in u',:?[]{}'):
-                    break
-                length += 1
-            # It's not clear what we should do with ':' in the flow context.
-            if (self.flow_level and ch == u':'
-                    and self.peek(length+1) not in u'\0 \t\r\n\x85\u2028\u2029,[]{}'):
-                self.forward(length)
-                raise ScannerError("while scanning a plain scalar", start_mark,
-                    "found unexpected ':'", self.get_mark(),
-                    "Please check http://pyyaml.org/wiki/YAMLColonInFlowContext for details.")
-            if length == 0:
-                break
-            self.allow_simple_key = False
-            chunks.extend(spaces)
-            chunks.append(self.prefix(length))
-            self.forward(length)
-            end_mark = self.get_mark()
-            spaces = self.scan_plain_spaces(indent, start_mark)
-            if not spaces or self.peek() == u'#' \
-                    or (not self.flow_level and self.column < indent):
-                break
-        return ScalarToken(u''.join(chunks), True, start_mark, end_mark)
-
-    def scan_plain_spaces(self, indent, start_mark):
-        # See the specification for details.
-        # The specification is really confusing about tabs in plain scalars.
-        # We just forbid them completely. Do not use tabs in YAML!
-        chunks = []
-        length = 0
-        while self.peek(length) in u' ':
-            length += 1
-        whitespaces = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch in u'\r\n\x85\u2028\u2029':
-            line_break = self.scan_line_break()
-            self.allow_simple_key = True
-            prefix = self.prefix(3)
-            if (prefix == u'---' or prefix == u'...')   \
-                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
-                return
-            breaks = []
-            while self.peek() in u' \r\n\x85\u2028\u2029':
-                if self.peek() == ' ':
-                    self.forward()
-                else:
-                    breaks.append(self.scan_line_break())
-                    prefix = self.prefix(3)
-                    if (prefix == u'---' or prefix == u'...')   \
-                            and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
-                        return
-            if line_break != u'\n':
-                chunks.append(line_break)
-            elif not breaks:
-                chunks.append(u' ')
-            chunks.extend(breaks)
-        elif whitespaces:
-            chunks.append(whitespaces)
-        return chunks
-
-    def scan_tag_handle(self, name, start_mark):
-        # See the specification for details.
-        # For some strange reasons, the specification does not allow '_' in
-        # tag handles. I have allowed it anyway.
-        ch = self.peek()
-        if ch != u'!':
-            raise ScannerError("while scanning a %s" % name, start_mark,
-                    "expected '!', but found %r" % ch.encode('utf-8'),
-                    self.get_mark())
-        length = 1
-        ch = self.peek(length)
-        if ch != u' ':
-            while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
-                    or ch in u'-_':
-                length += 1
-                ch = self.peek(length)
-            if ch != u'!':
-                self.forward(length)
-                raise ScannerError("while scanning a %s" % name, start_mark,
-                        "expected '!', but found %r" % ch.encode('utf-8'),
-                        self.get_mark())
-            length += 1
-        value = self.prefix(length)
-        self.forward(length)
-        return value
-
-    def scan_tag_uri(self, name, start_mark):
-        # See the specification for details.
-        # Note: we do not check if URI is well-formed.
-        chunks = []
-        length = 0
-        ch = self.peek(length)
-        while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
-                or ch in u'-;/?:@&=+$,_.!~*\'()[]%':
-            if ch == u'%':
-                chunks.append(self.prefix(length))
-                self.forward(length)
-                length = 0
-                chunks.append(self.scan_uri_escapes(name, start_mark))
-            else:
-                length += 1
-            ch = self.peek(length)
-        if length:
-            chunks.append(self.prefix(length))
-            self.forward(length)
-            length = 0
-        if not chunks:
-            raise ScannerError("while parsing a %s" % name, start_mark,
-                    "expected URI, but found %r" % ch.encode('utf-8'),
-                    self.get_mark())
-        return u''.join(chunks)
-
-    def scan_uri_escapes(self, name, start_mark):
-        # See the specification for details.
-        bytes = []
-        mark = self.get_mark()
-        while self.peek() == u'%':
-            self.forward()
-            for k in range(2):
-                if self.peek(k) not in u'0123456789ABCDEFabcdef':
-                    raise ScannerError("while scanning a %s" % name, start_mark,
-                            "expected URI escape sequence of 2 hexdecimal numbers, but found %r" %
-                                (self.peek(k).encode('utf-8')), self.get_mark())
-            bytes.append(chr(int(self.prefix(2), 16)))
-            self.forward(2)
-        try:
-            value = unicode(''.join(bytes), 'utf-8')
-        except UnicodeDecodeError, exc:
-            raise ScannerError("while scanning a %s" % name, start_mark, str(exc), mark)
-        return value
-
-    def scan_line_break(self):
-        # Transforms:
-        #   '\r\n'      :   '\n'
-        #   '\r'        :   '\n'
-        #   '\n'        :   '\n'
-        #   '\x85'      :   '\n'
-        #   '\u2028'    :   '\u2028'
-        #   '\u2029     :   '\u2029'
-        #   default     :   ''
-        ch = self.peek()
-        if ch in u'\r\n\x85':
-            if self.prefix(2) == u'\r\n':
-                self.forward(2)
-            else:
-                self.forward()
-            return u'\n'
-        elif ch in u'\u2028\u2029':
-            self.forward()
-            return ch
-        return u''
-
-#try:
-#    import psyco
-#    psyco.bind(Scanner)
-#except ImportError:
-#    pass
-
diff --git a/python.d/python_modules/pyyaml2/serializer.py b/python.d/python_modules/pyyaml2/serializer.py
deleted file mode 100644
index 0bf1e96d..00000000
--- a/python.d/python_modules/pyyaml2/serializer.py
+++ /dev/null
@@ -1,111 +0,0 @@
-
-__all__ = ['Serializer', 'SerializerError']
-
-from error import YAMLError
-from events import *
-from nodes import *
-
-class SerializerError(YAMLError):
-    pass
-
-class Serializer(object):
-
-    ANCHOR_TEMPLATE = u'id%03d'
-
-    def __init__(self, encoding=None,
-            explicit_start=None, explicit_end=None, version=None, tags=None):
-        self.use_encoding = encoding
-        self.use_explicit_start = explicit_start
-        self.use_explicit_end = explicit_end
-        self.use_version = version
-        self.use_tags = tags
-        self.serialized_nodes = {}
-        self.anchors = {}
-        self.last_anchor_id = 0
-        self.closed = None
-
-    def open(self):
-        if self.closed is None:
-            self.emit(StreamStartEvent(encoding=self.use_encoding))
-            self.closed = False
-        elif self.closed:
-            raise SerializerError("serializer is closed")
-        else:
-            raise SerializerError("serializer is already opened")
-
-    def close(self):
-        if self.closed is None:
-            raise SerializerError("serializer is not opened")
-        elif not self.closed:
-            self.emit(StreamEndEvent())
-            self.closed = True
-
-    #def __del__(self):
-    #    self.close()
-
-    def serialize(self, node):
-        if self.closed is None:
-            raise SerializerError("serializer is not opened")
-        elif self.closed:
-            raise SerializerError("serializer is closed")
-        self.emit(DocumentStartEvent(explicit=self.use_explicit_start,
-            version=self.use_version, tags=self.use_tags))
-        self.anchor_node(node)
-        self.serialize_node(node, None, None)
-        self.emit(DocumentEndEvent(explicit=self.use_explicit_end))
-        self.serialized_nodes = {}
-        self.anchors = {}
-        self.last_anchor_id = 0
-
-    def anchor_node(self, node):
-        if node in self.anchors:
-            if self.anchors[node] is None:
-                self.anchors[node] = self.generate_anchor(node)
-        else:
-            self.anchors[node] = None
-            if isinstance(node, SequenceNode):
-                for item in node.value:
-                    self.anchor_node(item)
-            elif isinstance(node, MappingNode):
-                for key, value in node.value:
-                    self.anchor_node(key)
-                    self.anchor_node(value)
-
-    def generate_anchor(self, node):
-        self.last_anchor_id += 1
-        return self.ANCHOR_TEMPLATE % self.last_anchor_id
-
-    def serialize_node(self, node, parent, index):
-        alias = self.anchors[node]
-        if node in self.serialized_nodes:
-            self.emit(AliasEvent(alias))
-        else:
-            self.serialized_nodes[node] = True
-            self.descend_resolver(parent, index)
-            if isinstance(node, ScalarNode):
-                detected_tag = self.resolve(ScalarNode, node.value, (True, False))
-                default_tag = self.resolve(ScalarNode, node.value, (False, True))
-                implicit = (node.tag == detected_tag), (node.tag == default_tag)
-                self.emit(ScalarEvent(alias, node.tag, implicit, node.value,
-                    style=node.style))
-            elif isinstance(node, SequenceNode):
-                implicit = (node.tag
-                            == self.resolve(SequenceNode, node.value, True))
-                self.emit(SequenceStartEvent(alias, node.tag, implicit,
-                    flow_style=node.flow_style))
-                index = 0
-                for item in node.value:
-                    self.serialize_node(item, node, index)
-                    index += 1
-                self.emit(SequenceEndEvent())
-            elif isinstance(node, MappingNode):
-                implicit = (node.tag
-                            == self.resolve(MappingNode, node.value, True))
-                self.emit(MappingStartEvent(alias, node.tag, implicit,
-                    flow_style=node.flow_style))
-                for key, value in node.value:
-                    self.serialize_node(key, node, None)
-                    self.serialize_node(value, node, key)
-                self.emit(MappingEndEvent())
-            self.ascend_resolver()
-
diff --git a/python.d/python_modules/pyyaml2/tokens.py b/python.d/python_modules/pyyaml2/tokens.py
deleted file mode 100644
index 4d0b48a3..00000000
--- a/python.d/python_modules/pyyaml2/tokens.py
+++ /dev/null
@@ -1,104 +0,0 @@
-
-class Token(object):
-    def __init__(self, start_mark, end_mark):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-    def __repr__(self):
-        attributes = [key for key in self.__dict__
-                if not key.endswith('_mark')]
-        attributes.sort()
-        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
-                for key in attributes])
-        return '%s(%s)' % (self.__class__.__name__, arguments)
-
-#class BOMToken(Token):
-#    id = '<byte order mark>'
-
-class DirectiveToken(Token):
-    id = '<directive>'
-    def __init__(self, name, value, start_mark, end_mark):
-        self.name = name
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class DocumentStartToken(Token):
-    id = '<document start>'
-
-class DocumentEndToken(Token):
-    id = '<document end>'
-
-class StreamStartToken(Token):
-    id = '<stream start>'
-    def __init__(self, start_mark=None, end_mark=None,
-            encoding=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.encoding = encoding
-
-class StreamEndToken(Token):
-    id = '<stream end>'
-
-class BlockSequenceStartToken(Token):
-    id = '<block sequence start>'
-
-class BlockMappingStartToken(Token):
-    id = '<block mapping start>'
-
-class BlockEndToken(Token):
-    id = '<block end>'
-
-class FlowSequenceStartToken(Token):
-    id = '['
-
-class FlowMappingStartToken(Token):
-    id = '{'
-
-class FlowSequenceEndToken(Token):
-    id = ']'
-
-class FlowMappingEndToken(Token):
-    id = '}'
-
-class KeyToken(Token):
-    id = '?'
-
-class ValueToken(Token):
-    id = ':'
-
-class BlockEntryToken(Token):
-    id = '-'
-
-class FlowEntryToken(Token):
-    id = ','
-
-class AliasToken(Token):
-    id = '<alias>'
-    def __init__(self, value, start_mark, end_mark):
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class AnchorToken(Token):
-    id = '<anchor>'
-    def __init__(self, value, start_mark, end_mark):
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class TagToken(Token):
-    id = '<tag>'
-    def __init__(self, value, start_mark, end_mark):
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class ScalarToken(Token):
-    id = '<scalar>'
-    def __init__(self, value, plain, start_mark, end_mark, style=None):
-        self.value = value
-        self.plain = plain
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.style = style
-
diff --git a/python.d/python_modules/pyyaml3/__init__.py b/python.d/python_modules/pyyaml3/__init__.py
deleted file mode 100644
index a5e20f94..00000000
--- a/python.d/python_modules/pyyaml3/__init__.py
+++ /dev/null
@@ -1,312 +0,0 @@
-
-from .error import *
-
-from .tokens import *
-from .events import *
-from .nodes import *
-
-from .loader import *
-from .dumper import *
-
-__version__ = '3.11'
-try:
-    from .cyaml import *
-    __with_libyaml__ = True
-except ImportError:
-    __with_libyaml__ = False
-
-import io
-
-def scan(stream, Loader=Loader):
-    """
-    Scan a YAML stream and produce scanning tokens.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_token():
-            yield loader.get_token()
-    finally:
-        loader.dispose()
-
-def parse(stream, Loader=Loader):
-    """
-    Parse a YAML stream and produce parsing events.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_event():
-            yield loader.get_event()
-    finally:
-        loader.dispose()
-
-def compose(stream, Loader=Loader):
-    """
-    Parse the first YAML document in a stream
-    and produce the corresponding representation tree.
-    """
-    loader = Loader(stream)
-    try:
-        return loader.get_single_node()
-    finally:
-        loader.dispose()
-
-def compose_all(stream, Loader=Loader):
-    """
-    Parse all YAML documents in a stream
-    and produce corresponding representation trees.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_node():
-            yield loader.get_node()
-    finally:
-        loader.dispose()
-
-def load(stream, Loader=Loader):
-    """
-    Parse the first YAML document in a stream
-    and produce the corresponding Python object.
-    """
-    loader = Loader(stream)
-    try:
-        return loader.get_single_data()
-    finally:
-        loader.dispose()
-
-def load_all(stream, Loader=Loader):
-    """
-    Parse all YAML documents in a stream
-    and produce corresponding Python objects.
-    """
-    loader = Loader(stream)
-    try:
-        while loader.check_data():
-            yield loader.get_data()
-    finally:
-        loader.dispose()
-
-def safe_load(stream):
-    """
-    Parse the first YAML document in a stream
-    and produce the corresponding Python object.
-    Resolve only basic YAML tags.
-    """
-    return load(stream, SafeLoader)
-
-def safe_load_all(stream):
-    """
-    Parse all YAML documents in a stream
-    and produce corresponding Python objects.
-    Resolve only basic YAML tags.
-    """
-    return load_all(stream, SafeLoader)
-
-def emit(events, stream=None, Dumper=Dumper,
-        canonical=None, indent=None, width=None,
-        allow_unicode=None, line_break=None):
-    """
-    Emit YAML parsing events into a stream.
-    If stream is None, return the produced string instead.
-    """
-    getvalue = None
-    if stream is None:
-        stream = io.StringIO()
-        getvalue = stream.getvalue
-    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
-            allow_unicode=allow_unicode, line_break=line_break)
-    try:
-        for event in events:
-            dumper.emit(event)
-    finally:
-        dumper.dispose()
-    if getvalue:
-        return getvalue()
-
-def serialize_all(nodes, stream=None, Dumper=Dumper,
-        canonical=None, indent=None, width=None,
-        allow_unicode=None, line_break=None,
-        encoding=None, explicit_start=None, explicit_end=None,
-        version=None, tags=None):
-    """
-    Serialize a sequence of representation trees into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    getvalue = None
-    if stream is None:
-        if encoding is None:
-            stream = io.StringIO()
-        else:
-            stream = io.BytesIO()
-        getvalue = stream.getvalue
-    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
-            allow_unicode=allow_unicode, line_break=line_break,
-            encoding=encoding, version=version, tags=tags,
-            explicit_start=explicit_start, explicit_end=explicit_end)
-    try:
-        dumper.open()
-        for node in nodes:
-            dumper.serialize(node)
-        dumper.close()
-    finally:
-        dumper.dispose()
-    if getvalue:
-        return getvalue()
-
-def serialize(node, stream=None, Dumper=Dumper, **kwds):
-    """
-    Serialize a representation tree into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    return serialize_all([node], stream, Dumper=Dumper, **kwds)
-
-def dump_all(documents, stream=None, Dumper=Dumper,
-        default_style=None, default_flow_style=None,
-        canonical=None, indent=None, width=None,
-        allow_unicode=None, line_break=None,
-        encoding=None, explicit_start=None, explicit_end=None,
-        version=None, tags=None):
-    """
-    Serialize a sequence of Python objects into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    getvalue = None
-    if stream is None:
-        if encoding is None:
-            stream = io.StringIO()
-        else:
-            stream = io.BytesIO()
-        getvalue = stream.getvalue
-    dumper = Dumper(stream, default_style=default_style,
-            default_flow_style=default_flow_style,
-            canonical=canonical, indent=indent, width=width,
-            allow_unicode=allow_unicode, line_break=line_break,
-            encoding=encoding, version=version, tags=tags,
-            explicit_start=explicit_start, explicit_end=explicit_end)
-    try:
-        dumper.open()
-        for data in documents:
-            dumper.represent(data)
-        dumper.close()
-    finally:
-        dumper.dispose()
-    if getvalue:
-        return getvalue()
-
-def dump(data, stream=None, Dumper=Dumper, **kwds):
-    """
-    Serialize a Python object into a YAML stream.
-    If stream is None, return the produced string instead.
-    """
-    return dump_all([data], stream, Dumper=Dumper, **kwds)
-
-def safe_dump_all(documents, stream=None, **kwds):
-    """
-    Serialize a sequence of Python objects into a YAML stream.
-    Produce only basic YAML tags.
-    If stream is None, return the produced string instead.
-    """
-    return dump_all(documents, stream, Dumper=SafeDumper, **kwds)
-
-def safe_dump(data, stream=None, **kwds):
-    """
-    Serialize a Python object into a YAML stream.
-    Produce only basic YAML tags.
-    If stream is None, return the produced string instead.
-    """
-    return dump_all([data], stream, Dumper=SafeDumper, **kwds)
-
-def add_implicit_resolver(tag, regexp, first=None,
-        Loader=Loader, Dumper=Dumper):
-    """
-    Add an implicit scalar detector.
-    If an implicit scalar value matches the given regexp,
-    the corresponding tag is assigned to the scalar.
-    first is a sequence of possible initial characters or None.
-    """
-    Loader.add_implicit_resolver(tag, regexp, first)
-    Dumper.add_implicit_resolver(tag, regexp, first)
-
-def add_path_resolver(tag, path, kind=None, Loader=Loader, Dumper=Dumper):
-    """
-    Add a path based resolver for the given tag.
-    A path is a list of keys that forms a path
-    to a node in the representation tree.
-    Keys can be string values, integers, or None.
-    """
-    Loader.add_path_resolver(tag, path, kind)
-    Dumper.add_path_resolver(tag, path, kind)
-
-def add_constructor(tag, constructor, Loader=Loader):
-    """
-    Add a constructor for the given tag.
-    Constructor is a function that accepts a Loader instance
-    and a node object and produces the corresponding Python object.
-    """
-    Loader.add_constructor(tag, constructor)
-
-def add_multi_constructor(tag_prefix, multi_constructor, Loader=Loader):
-    """
-    Add a multi-constructor for the given tag prefix.
-    Multi-constructor is called for a node if its tag starts with tag_prefix.
-    Multi-constructor accepts a Loader instance, a tag suffix,
-    and a node object and produces the corresponding Python object.
-    """
-    Loader.add_multi_constructor(tag_prefix, multi_constructor)
-
-def add_representer(data_type, representer, Dumper=Dumper):
-    """
-    Add a representer for the given type.
-    Representer is a function accepting a Dumper instance
-    and an instance of the given data type
-    and producing the corresponding representation node.
-    """
-    Dumper.add_representer(data_type, representer)
-
-def add_multi_representer(data_type, multi_representer, Dumper=Dumper):
-    """
-    Add a representer for the given type.
-    Multi-representer is a function accepting a Dumper instance
-    and an instance of the given data type or subtype
-    and producing the corresponding representation node.
-    """
-    Dumper.add_multi_representer(data_type, multi_representer)
-
-class YAMLObjectMetaclass(type):
-    """
-    The metaclass for YAMLObject.
-    """
-    def __init__(cls, name, bases, kwds):
-        super(YAMLObjectMetaclass, cls).__init__(name, bases, kwds)
-        if 'yaml_tag' in kwds and kwds['yaml_tag'] is not None:
-            cls.yaml_loader.add_constructor(cls.yaml_tag, cls.from_yaml)
-            cls.yaml_dumper.add_representer(cls, cls.to_yaml)
-
-class YAMLObject(metaclass=YAMLObjectMetaclass):
-    """
-    An object that can dump itself to a YAML stream
-    and load itself from a YAML stream.
-    """
-
-    __slots__ = ()  # no direct instantiation, so allow immutable subclasses
-
-    yaml_loader = Loader
-    yaml_dumper = Dumper
-
-    yaml_tag = None
-    yaml_flow_style = None
-
-    @classmethod
-    def from_yaml(cls, loader, node):
-        """
-        Convert a representation node to a Python object.
-        """
-        return loader.construct_yaml_object(node, cls)
-
-    @classmethod
-    def to_yaml(cls, dumper, data):
-        """
-        Convert a Python object to a representation node.
-        """
-        return dumper.represent_yaml_object(cls.yaml_tag, data, cls,
-                flow_style=cls.yaml_flow_style)
-
diff --git a/python.d/python_modules/pyyaml3/composer.py b/python.d/python_modules/pyyaml3/composer.py
deleted file mode 100644
index d5c6a7ac..00000000
--- a/python.d/python_modules/pyyaml3/composer.py
+++ /dev/null
@@ -1,139 +0,0 @@
-
-__all__ = ['Composer', 'ComposerError']
-
-from .error import MarkedYAMLError
-from .events import *
-from .nodes import *
-
-class ComposerError(MarkedYAMLError):
-    pass
-
-class Composer:
-
-    def __init__(self):
-        self.anchors = {}
-
-    def check_node(self):
-        # Drop the STREAM-START event.
-        if self.check_event(StreamStartEvent):
-            self.get_event()
-
-        # If there are more documents available?
-        return not self.check_event(StreamEndEvent)
-
-    def get_node(self):
-        # Get the root node of the next document.
-        if not self.check_event(StreamEndEvent):
-            return self.compose_document()
-
-    def get_single_node(self):
-        # Drop the STREAM-START event.
-        self.get_event()
-
-        # Compose a document if the stream is not empty.
-        document = None
-        if not self.check_event(StreamEndEvent):
-            document = self.compose_document()
-
-        # Ensure that the stream contains no more documents.
-        if not self.check_event(StreamEndEvent):
-            event = self.get_event()
-            raise ComposerError("expected a single document in the stream",
-                    document.start_mark, "but found another document",
-                    event.start_mark)
-
-        # Drop the STREAM-END event.
-        self.get_event()
-
-        return document
-
-    def compose_document(self):
-        # Drop the DOCUMENT-START event.
-        self.get_event()
-
-        # Compose the root node.
-        node = self.compose_node(None, None)
-
-        # Drop the DOCUMENT-END event.
-        self.get_event()
-
-        self.anchors = {}
-        return node
-
-    def compose_node(self, parent, index):
-        if self.check_event(AliasEvent):
-            event = self.get_event()
-            anchor = event.anchor
-            if anchor not in self.anchors:
-                raise ComposerError(None, None, "found undefined alias %r"
-                        % anchor, event.start_mark)
-            return self.anchors[anchor]
-        event = self.peek_event()
-        anchor = event.anchor
-        if anchor is not None:
-            if anchor in self.anchors:
-                raise ComposerError("found duplicate anchor %r; first occurence"
-                        % anchor, self.anchors[anchor].start_mark,
-                        "second occurence", event.start_mark)
-        self.descend_resolver(parent, index)
-        if self.check_event(ScalarEvent):
-            node = self.compose_scalar_node(anchor)
-        elif self.check_event(SequenceStartEvent):
-            node = self.compose_sequence_node(anchor)
-        elif self.check_event(MappingStartEvent):
-            node = self.compose_mapping_node(anchor)
-        self.ascend_resolver()
-        return node
-
-    def compose_scalar_node(self, anchor):
-        event = self.get_event()
-        tag = event.tag
-        if tag is None or tag == '!':
-            tag = self.resolve(ScalarNode, event.value, event.implicit)
-        node = ScalarNode(tag, event.value,
-                event.start_mark, event.end_mark, style=event.style)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        return node
-
-    def compose_sequence_node(self, anchor):
-        start_event = self.get_event()
-        tag = start_event.tag
-        if tag is None or tag == '!':
-            tag = self.resolve(SequenceNode, None, start_event.implicit)
-        node = SequenceNode(tag, [],
-                start_event.start_mark, None,
-                flow_style=start_event.flow_style)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        index = 0
-        while not self.check_event(SequenceEndEvent):
-            node.value.append(self.compose_node(node, index))
-            index += 1
-        end_event = self.get_event()
-        node.end_mark = end_event.end_mark
-        return node
-
-    def compose_mapping_node(self, anchor):
-        start_event = self.get_event()
-        tag = start_event.tag
-        if tag is None or tag == '!':
-            tag = self.resolve(MappingNode, None, start_event.implicit)
-        node = MappingNode(tag, [],
-                start_event.start_mark, None,
-                flow_style=start_event.flow_style)
-        if anchor is not None:
-            self.anchors[anchor] = node
-        while not self.check_event(MappingEndEvent):
-            #key_event = self.peek_event()
-            item_key = self.compose_node(node, None)
-            #if item_key in node.value:
-            #    raise ComposerError("while composing a mapping", start_event.start_mark,
-            #            "found duplicate key", key_event.start_mark)
-            item_value = self.compose_node(node, item_key)
-            #node.value[item_key] = item_value
-            node.value.append((item_key, item_value))
-        end_event = self.get_event()
-        node.end_mark = end_event.end_mark
-        return node
-
diff --git a/python.d/python_modules/pyyaml3/constructor.py b/python.d/python_modules/pyyaml3/constructor.py
deleted file mode 100644
index 981543ae..00000000
--- a/python.d/python_modules/pyyaml3/constructor.py
+++ /dev/null
@@ -1,686 +0,0 @@
-
-__all__ = ['BaseConstructor', 'SafeConstructor', 'Constructor',
-    'ConstructorError']
-
-from .error import *
-from .nodes import *
-
-import collections, datetime, base64, binascii, re, sys, types
-
-class ConstructorError(MarkedYAMLError):
-    pass
-
-class BaseConstructor:
-
-    yaml_constructors = {}
-    yaml_multi_constructors = {}
-
-    def __init__(self):
-        self.constructed_objects = {}
-        self.recursive_objects = {}
-        self.state_generators = []
-        self.deep_construct = False
-
-    def check_data(self):
-        # If there are more documents available?
-        return self.check_node()
-
-    def get_data(self):
-        # Construct and return the next document.
-        if self.check_node():
-            return self.construct_document(self.get_node())
-
-    def get_single_data(self):
-        # Ensure that the stream contains a single document and construct it.
-        node = self.get_single_node()
-        if node is not None:
-            return self.construct_document(node)
-        return None
-
-    def construct_document(self, node):
-        data = self.construct_object(node)
-        while self.state_generators:
-            state_generators = self.state_generators
-            self.state_generators = []
-            for generator in state_generators:
-                for dummy in generator:
-                    pass
-        self.constructed_objects = {}
-        self.recursive_objects = {}
-        self.deep_construct = False
-        return data
-
-    def construct_object(self, node, deep=False):
-        if node in self.constructed_objects:
-            return self.constructed_objects[node]
-        if deep:
-            old_deep = self.deep_construct
-            self.deep_construct = True
-        if node in self.recursive_objects:
-            raise ConstructorError(None, None,
-                    "found unconstructable recursive node", node.start_mark)
-        self.recursive_objects[node] = None
-        constructor = None
-        tag_suffix = None
-        if node.tag in self.yaml_constructors:
-            constructor = self.yaml_constructors[node.tag]
-        else:
-            for tag_prefix in self.yaml_multi_constructors:
-                if node.tag.startswith(tag_prefix):
-                    tag_suffix = node.tag[len(tag_prefix):]
-                    constructor = self.yaml_multi_constructors[tag_prefix]
-                    break
-            else:
-                if None in self.yaml_multi_constructors:
-                    tag_suffix = node.tag
-                    constructor = self.yaml_multi_constructors[None]
-                elif None in self.yaml_constructors:
-                    constructor = self.yaml_constructors[None]
-                elif isinstance(node, ScalarNode):
-                    constructor = self.__class__.construct_scalar
-                elif isinstance(node, SequenceNode):
-                    constructor = self.__class__.construct_sequence
-                elif isinstance(node, MappingNode):
-                    constructor = self.__class__.construct_mapping
-        if tag_suffix is None:
-            data = constructor(self, node)
-        else:
-            data = constructor(self, tag_suffix, node)
-        if isinstance(data, types.GeneratorType):
-            generator = data
-            data = next(generator)
-            if self.deep_construct:
-                for dummy in generator:
-                    pass
-            else:
-                self.state_generators.append(generator)
-        self.constructed_objects[node] = data
-        del self.recursive_objects[node]
-        if deep:
-            self.deep_construct = old_deep
-        return data
-
-    def construct_scalar(self, node):
-        if not isinstance(node, ScalarNode):
-            raise ConstructorError(None, None,
-                    "expected a scalar node, but found %s" % node.id,
-                    node.start_mark)
-        return node.value
-
-    def construct_sequence(self, node, deep=False):
-        if not isinstance(node, SequenceNode):
-            raise ConstructorError(None, None,
-                    "expected a sequence node, but found %s" % node.id,
-                    node.start_mark)
-        return [self.construct_object(child, deep=deep)
-                for child in node.value]
-
-    def construct_mapping(self, node, deep=False):
-        if not isinstance(node, MappingNode):
-            raise ConstructorError(None, None,
-                    "expected a mapping node, but found %s" % node.id,
-                    node.start_mark)
-        mapping = {}
-        for key_node, value_node in node.value:
-            key = self.construct_object(key_node, deep=deep)
-            if not isinstance(key, collections.Hashable):
-                raise ConstructorError("while constructing a mapping", node.start_mark,
-                        "found unhashable key", key_node.start_mark)
-            value = self.construct_object(value_node, deep=deep)
-            mapping[key] = value
-        return mapping
-
-    def construct_pairs(self, node, deep=False):
-        if not isinstance(node, MappingNode):
-            raise ConstructorError(None, None,
-                    "expected a mapping node, but found %s" % node.id,
-                    node.start_mark)
-        pairs = []
-        for key_node, value_node in node.value:
-            key = self.construct_object(key_node, deep=deep)
-            value = self.construct_object(value_node, deep=deep)
-            pairs.append((key, value))
-        return pairs
-
-    @classmethod
-    def add_constructor(cls, tag, constructor):
-        if not 'yaml_constructors' in cls.__dict__:
-            cls.yaml_constructors = cls.yaml_constructors.copy()
-        cls.yaml_constructors[tag] = constructor
-
-    @classmethod
-    def add_multi_constructor(cls, tag_prefix, multi_constructor):
-        if not 'yaml_multi_constructors' in cls.__dict__:
-            cls.yaml_multi_constructors = cls.yaml_multi_constructors.copy()
-        cls.yaml_multi_constructors[tag_prefix] = multi_constructor
-
-class SafeConstructor(BaseConstructor):
-
-    def construct_scalar(self, node):
-        if isinstance(node, MappingNode):
-            for key_node, value_node in node.value:
-                if key_node.tag == 'tag:yaml.org,2002:value':
-                    return self.construct_scalar(value_node)
-        return super().construct_scalar(node)
-
-    def flatten_mapping(self, node):
-        merge = []
-        index = 0
-        while index < len(node.value):
-            key_node, value_node = node.value[index]
-            if key_node.tag == 'tag:yaml.org,2002:merge':
-                del node.value[index]
-                if isinstance(value_node, MappingNode):
-                    self.flatten_mapping(value_node)
-                    merge.extend(value_node.value)
-                elif isinstance(value_node, SequenceNode):
-                    submerge = []
-                    for subnode in value_node.value:
-                        if not isinstance(subnode, MappingNode):
-                            raise ConstructorError("while constructing a mapping",
-                                    node.start_mark,
-                                    "expected a mapping for merging, but found %s"
-                                    % subnode.id, subnode.start_mark)
-                        self.flatten_mapping(subnode)
-                        submerge.append(subnode.value)
-                    submerge.reverse()
-                    for value in submerge:
-                        merge.extend(value)
-                else:
-                    raise ConstructorError("while constructing a mapping", node.start_mark,
-                            "expected a mapping or list of mappings for merging, but found %s"
-                            % value_node.id, value_node.start_mark)
-            elif key_node.tag == 'tag:yaml.org,2002:value':
-                key_node.tag = 'tag:yaml.org,2002:str'
-                index += 1
-            else:
-                index += 1
-        if merge:
-            node.value = merge + node.value
-
-    def construct_mapping(self, node, deep=False):
-        if isinstance(node, MappingNode):
-            self.flatten_mapping(node)
-        return super().construct_mapping(node, deep=deep)
-
-    def construct_yaml_null(self, node):
-        self.construct_scalar(node)
-        return None
-
-    bool_values = {
-        'yes':      True,
-        'no':       False,
-        'true':     True,
-        'false':    False,
-        'on':       True,
-        'off':      False,
-    }
-
-    def construct_yaml_bool(self, node):
-        value = self.construct_scalar(node)
-        return self.bool_values[value.lower()]
-
-    def construct_yaml_int(self, node):
-        value = self.construct_scalar(node)
-        value = value.replace('_', '')
-        sign = +1
-        if value[0] == '-':
-            sign = -1
-        if value[0] in '+-':
-            value = value[1:]
-        if value == '0':
-            return 0
-        elif value.startswith('0b'):
-            return sign*int(value[2:], 2)
-        elif value.startswith('0x'):
-            return sign*int(value[2:], 16)
-        elif value[0] == '0':
-            return sign*int(value, 8)
-        elif ':' in value:
-            digits = [int(part) for part in value.split(':')]
-            digits.reverse()
-            base = 1
-            value = 0
-            for digit in digits:
-                value += digit*base
-                base *= 60
-            return sign*value
-        else:
-            return sign*int(value)
-
-    inf_value = 1e300
-    while inf_value != inf_value*inf_value:
-        inf_value *= inf_value
-    nan_value = -inf_value/inf_value   # Trying to make a quiet NaN (like C99).
-
-    def construct_yaml_float(self, node):
-        value = self.construct_scalar(node)
-        value = value.replace('_', '').lower()
-        sign = +1
-        if value[0] == '-':
-            sign = -1
-        if value[0] in '+-':
-            value = value[1:]
-        if value == '.inf':
-            return sign*self.inf_value
-        elif value == '.nan':
-            return self.nan_value
-        elif ':' in value:
-            digits = [float(part) for part in value.split(':')]
-            digits.reverse()
-            base = 1
-            value = 0.0
-            for digit in digits:
-                value += digit*base
-                base *= 60
-            return sign*value
-        else:
-            return sign*float(value)
-
-    def construct_yaml_binary(self, node):
-        try:
-            value = self.construct_scalar(node).encode('ascii')
-        except UnicodeEncodeError as exc:
-            raise ConstructorError(None, None,
-                    "failed to convert base64 data into ascii: %s" % exc,
-                    node.start_mark)
-        try:
-            if hasattr(base64, 'decodebytes'):
-                return base64.decodebytes(value)
-            else:
-                return base64.decodestring(value)
-        except binascii.Error as exc:
-            raise ConstructorError(None, None,
-                    "failed to decode base64 data: %s" % exc, node.start_mark)
-
-    timestamp_regexp = re.compile(
-            r'''^(?P<year>[0-9][0-9][0-9][0-9])
-                -(?P<month>[0-9][0-9]?)
-                -(?P<day>[0-9][0-9]?)
-                (?:(?:[Tt]|[ \t]+)
-                (?P<hour>[0-9][0-9]?)
-                :(?P<minute>[0-9][0-9])
-                :(?P<second>[0-9][0-9])
-                (?:\.(?P<fraction>[0-9]*))?
-                (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
-                (?::(?P<tz_minute>[0-9][0-9]))?))?)?$''', re.X)
-
-    def construct_yaml_timestamp(self, node):
-        value = self.construct_scalar(node)
-        match = self.timestamp_regexp.match(node.value)
-        values = match.groupdict()
-        year = int(values['year'])
-        month = int(values['month'])
-        day = int(values['day'])
-        if not values['hour']:
-            return datetime.date(year, month, day)
-        hour = int(values['hour'])
-        minute = int(values['minute'])
-        second = int(values['second'])
-        fraction = 0
-        if values['fraction']:
-            fraction = values['fraction'][:6]
-            while len(fraction) < 6:
-                fraction += '0'
-            fraction = int(fraction)
-        delta = None
-        if values['tz_sign']:
-            tz_hour = int(values['tz_hour'])
-            tz_minute = int(values['tz_minute'] or 0)
-            delta = datetime.timedelta(hours=tz_hour, minutes=tz_minute)
-            if values['tz_sign'] == '-':
-                delta = -delta
-        data = datetime.datetime(year, month, day, hour, minute, second, fraction)
-        if delta:
-            data -= delta
-        return data
-
-    def construct_yaml_omap(self, node):
-        # Note: we do not check for duplicate keys, because it's too
-        # CPU-expensive.
-        omap = []
-        yield omap
-        if not isinstance(node, SequenceNode):
-            raise ConstructorError("while constructing an ordered map", node.start_mark,
-                    "expected a sequence, but found %s" % node.id, node.start_mark)
-        for subnode in node.value:
-            if not isinstance(subnode, MappingNode):
-                raise ConstructorError("while constructing an ordered map", node.start_mark,
-                        "expected a mapping of length 1, but found %s" % subnode.id,
-                        subnode.start_mark)
-            if len(subnode.value) != 1:
-                raise ConstructorError("while constructing an ordered map", node.start_mark,
-                        "expected a single mapping item, but found %d items" % len(subnode.value),
-                        subnode.start_mark)
-            key_node, value_node = subnode.value[0]
-            key = self.construct_object(key_node)
-            value = self.construct_object(value_node)
-            omap.append((key, value))
-
-    def construct_yaml_pairs(self, node):
-        # Note: the same code as `construct_yaml_omap`.
-        pairs = []
-        yield pairs
-        if not isinstance(node, SequenceNode):
-            raise ConstructorError("while constructing pairs", node.start_mark,
-                    "expected a sequence, but found %s" % node.id, node.start_mark)
-        for subnode in node.value:
-            if not isinstance(subnode, MappingNode):
-                raise ConstructorError("while constructing pairs", node.start_mark,
-                        "expected a mapping of length 1, but found %s" % subnode.id,
-                        subnode.start_mark)
-            if len(subnode.value) != 1:
-                raise ConstructorError("while constructing pairs", node.start_mark,
-                        "expected a single mapping item, but found %d items" % len(subnode.value),
-                        subnode.start_mark)
-            key_node, value_node = subnode.value[0]
-            key = self.construct_object(key_node)
-            value = self.construct_object(value_node)
-            pairs.append((key, value))
-
-    def construct_yaml_set(self, node):
-        data = set()
-        yield data
-        value = self.construct_mapping(node)
-        data.update(value)
-
-    def construct_yaml_str(self, node):
-        return self.construct_scalar(node)
-
-    def construct_yaml_seq(self, node):
-        data = []
-        yield data
-        data.extend(self.construct_sequence(node))
-
-    def construct_yaml_map(self, node):
-        data = {}
-        yield data
-        value = self.construct_mapping(node)
-        data.update(value)
-
-    def construct_yaml_object(self, node, cls):
-        data = cls.__new__(cls)
-        yield data
-        if hasattr(data, '__setstate__'):
-            state = self.construct_mapping(node, deep=True)
-            data.__setstate__(state)
-        else:
-            state = self.construct_mapping(node)
-            data.__dict__.update(state)
-
-    def construct_undefined(self, node):
-        raise ConstructorError(None, None,
-                "could not determine a constructor for the tag %r" % node.tag,
-                node.start_mark)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:null',
-        SafeConstructor.construct_yaml_null)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:bool',
-        SafeConstructor.construct_yaml_bool)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:int',
-        SafeConstructor.construct_yaml_int)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:float',
-        SafeConstructor.construct_yaml_float)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:binary',
-        SafeConstructor.construct_yaml_binary)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:timestamp',
-        SafeConstructor.construct_yaml_timestamp)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:omap',
-        SafeConstructor.construct_yaml_omap)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:pairs',
-        SafeConstructor.construct_yaml_pairs)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:set',
-        SafeConstructor.construct_yaml_set)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:str',
-        SafeConstructor.construct_yaml_str)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:seq',
-        SafeConstructor.construct_yaml_seq)
-
-SafeConstructor.add_constructor(
-        'tag:yaml.org,2002:map',
-        SafeConstructor.construct_yaml_map)
-
-SafeConstructor.add_constructor(None,
-        SafeConstructor.construct_undefined)
-
-class Constructor(SafeConstructor):
-
-    def construct_python_str(self, node):
-        return self.construct_scalar(node)
-
-    def construct_python_unicode(self, node):
-        return self.construct_scalar(node)
-
-    def construct_python_bytes(self, node):
-        try:
-            value = self.construct_scalar(node).encode('ascii')
-        except UnicodeEncodeError as exc:
-            raise ConstructorError(None, None,
-                    "failed to convert base64 data into ascii: %s" % exc,
-                    node.start_mark)
-        try:
-            if hasattr(base64, 'decodebytes'):
-                return base64.decodebytes(value)
-            else:
-                return base64.decodestring(value)
-        except binascii.Error as exc:
-            raise ConstructorError(None, None,
-                    "failed to decode base64 data: %s" % exc, node.start_mark)
-
-    def construct_python_long(self, node):
-        return self.construct_yaml_int(node)
-
-    def construct_python_complex(self, node):
-       return complex(self.construct_scalar(node))
-
-    def construct_python_tuple(self, node):
-        return tuple(self.construct_sequence(node))
-
-    def find_python_module(self, name, mark):
-        if not name:
-            raise ConstructorError("while constructing a Python module", mark,
-                    "expected non-empty name appended to the tag", mark)
-        try:
-            __import__(name)
-        except ImportError as exc:
-            raise ConstructorError("while constructing a Python module", mark,
-                    "cannot find module %r (%s)" % (name, exc), mark)
-        return sys.modules[name]
-
-    def find_python_name(self, name, mark):
-        if not name:
-            raise ConstructorError("while constructing a Python object", mark,
-                    "expected non-empty name appended to the tag", mark)
-        if '.' in name:
-            module_name, object_name = name.rsplit('.', 1)
-        else:
-            module_name = 'builtins'
-            object_name = name
-        try:
-            __import__(module_name)
-        except ImportError as exc:
-            raise ConstructorError("while constructing a Python object", mark,
-                    "cannot find module %r (%s)" % (module_name, exc), mark)
-        module = sys.modules[module_name]
-        if not hasattr(module, object_name):
-            raise ConstructorError("while constructing a Python object", mark,
-                    "cannot find %r in the module %r"
-                    % (object_name, module.__name__), mark)
-        return getattr(module, object_name)
-
-    def construct_python_name(self, suffix, node):
-        value = self.construct_scalar(node)
-        if value:
-            raise ConstructorError("while constructing a Python name", node.start_mark,
-                    "expected the empty value, but found %r" % value, node.start_mark)
-        return self.find_python_name(suffix, node.start_mark)
-
-    def construct_python_module(self, suffix, node):
-        value = self.construct_scalar(node)
-        if value:
-            raise ConstructorError("while constructing a Python module", node.start_mark,
-                    "expected the empty value, but found %r" % value, node.start_mark)
-        return self.find_python_module(suffix, node.start_mark)
-
-    def make_python_instance(self, suffix, node,
-            args=None, kwds=None, newobj=False):
-        if not args:
-            args = []
-        if not kwds:
-            kwds = {}
-        cls = self.find_python_name(suffix, node.start_mark)
-        if newobj and isinstance(cls, type):
-            return cls.__new__(cls, *args, **kwds)
-        else:
-            return cls(*args, **kwds)
-
-    def set_python_instance_state(self, instance, state):
-        if hasattr(instance, '__setstate__'):
-            instance.__setstate__(state)
-        else:
-            slotstate = {}
-            if isinstance(state, tuple) and len(state) == 2:
-                state, slotstate = state
-            if hasattr(instance, '__dict__'):
-                instance.__dict__.update(state)
-            elif state:
-                slotstate.update(state)
-            for key, value in slotstate.items():
-                setattr(object, key, value)
-
-    def construct_python_object(self, suffix, node):
-        # Format:
-        #   !!python/object:module.name { ... state ... }
-        instance = self.make_python_instance(suffix, node, newobj=True)
-        yield instance
-        deep = hasattr(instance, '__setstate__')
-        state = self.construct_mapping(node, deep=deep)
-        self.set_python_instance_state(instance, state)
-
-    def construct_python_object_apply(self, suffix, node, newobj=False):
-        # Format:
-        #   !!python/object/apply       # (or !!python/object/new)
-        #   args: [ ... arguments ... ]
-        #   kwds: { ... keywords ... }
-        #   state: ... state ...
-        #   listitems: [ ... listitems ... ]
-        #   dictitems: { ... dictitems ... }
-        # or short format:
-        #   !!python/object/apply [ ... arguments ... ]
-        # The difference between !!python/object/apply and !!python/object/new
-        # is how an object is created, check make_python_instance for details.
-        if isinstance(node, SequenceNode):
-            args = self.construct_sequence(node, deep=True)
-            kwds = {}
-            state = {}
-            listitems = []
-            dictitems = {}
-        else:
-            value = self.construct_mapping(node, deep=True)
-            args = value.get('args', [])
-            kwds = value.get('kwds', {})
-            state = value.get('state', {})
-            listitems = value.get('listitems', [])
-            dictitems = value.get('dictitems', {})
-        instance = self.make_python_instance(suffix, node, args, kwds, newobj)
-        if state:
-            self.set_python_instance_state(instance, state)
-        if listitems:
-            instance.extend(listitems)
-        if dictitems:
-            for key in dictitems:
-                instance[key] = dictitems[key]
-        return instance
-
-    def construct_python_object_new(self, suffix, node):
-        return self.construct_python_object_apply(suffix, node, newobj=True)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/none',
-    Constructor.construct_yaml_null)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/bool',
-    Constructor.construct_yaml_bool)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/str',
-    Constructor.construct_python_str)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/unicode',
-    Constructor.construct_python_unicode)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/bytes',
-    Constructor.construct_python_bytes)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/int',
-    Constructor.construct_yaml_int)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/long',
-    Constructor.construct_python_long)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/float',
-    Constructor.construct_yaml_float)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/complex',
-    Constructor.construct_python_complex)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/list',
-    Constructor.construct_yaml_seq)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/tuple',
-    Constructor.construct_python_tuple)
-
-Constructor.add_constructor(
-    'tag:yaml.org,2002:python/dict',
-    Constructor.construct_yaml_map)
-
-Constructor.add_multi_constructor(
-    'tag:yaml.org,2002:python/name:',
-    Constructor.construct_python_name)
-
-Constructor.add_multi_constructor(
-    'tag:yaml.org,2002:python/module:',
-    Constructor.construct_python_module)
-
-Constructor.add_multi_constructor(
-    'tag:yaml.org,2002:python/object:',
-    Constructor.construct_python_object)
-
-Constructor.add_multi_constructor(
-    'tag:yaml.org,2002:python/object/apply:',
-    Constructor.construct_python_object_apply)
-
-Constructor.add_multi_constructor(
-    'tag:yaml.org,2002:python/object/new:',
-    Constructor.construct_python_object_new)
-
diff --git a/python.d/python_modules/pyyaml3/cyaml.py b/python.d/python_modules/pyyaml3/cyaml.py
deleted file mode 100644
index d5cb87e9..00000000
--- a/python.d/python_modules/pyyaml3/cyaml.py
+++ /dev/null
@@ -1,85 +0,0 @@
-
-__all__ = ['CBaseLoader', 'CSafeLoader', 'CLoader',
-        'CBaseDumper', 'CSafeDumper', 'CDumper']
-
-from _yaml import CParser, CEmitter
-
-from .constructor import *
-
-from .serializer import *
-from .representer import *
-
-from .resolver import *
-
-class CBaseLoader(CParser, BaseConstructor, BaseResolver):
-
-    def __init__(self, stream):
-        CParser.__init__(self, stream)
-        BaseConstructor.__init__(self)
-        BaseResolver.__init__(self)
-
-class CSafeLoader(CParser, SafeConstructor, Resolver):
-
-    def __init__(self, stream):
-        CParser.__init__(self, stream)
-        SafeConstructor.__init__(self)
-        Resolver.__init__(self)
-
-class CLoader(CParser, Constructor, Resolver):
-
-    def __init__(self, stream):
-        CParser.__init__(self, stream)
-        Constructor.__init__(self)
-        Resolver.__init__(self)
-
-class CBaseDumper(CEmitter, BaseRepresenter, BaseResolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        CEmitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width, encoding=encoding,
-                allow_unicode=allow_unicode, line_break=line_break,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class CSafeDumper(CEmitter, SafeRepresenter, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        CEmitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width, encoding=encoding,
-                allow_unicode=allow_unicode, line_break=line_break,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        SafeRepresenter.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class CDumper(CEmitter, Serializer, Representer, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        CEmitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width, encoding=encoding,
-                allow_unicode=allow_unicode, line_break=line_break,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
diff --git a/python.d/python_modules/pyyaml3/dumper.py b/python.d/python_modules/pyyaml3/dumper.py
deleted file mode 100644
index 0b691287..00000000
--- a/python.d/python_modules/pyyaml3/dumper.py
+++ /dev/null
@@ -1,62 +0,0 @@
-
-__all__ = ['BaseDumper', 'SafeDumper', 'Dumper']
-
-from .emitter import *
-from .serializer import *
-from .representer import *
-from .resolver import *
-
-class BaseDumper(Emitter, Serializer, BaseRepresenter, BaseResolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        Emitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width,
-                allow_unicode=allow_unicode, line_break=line_break)
-        Serializer.__init__(self, encoding=encoding,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class SafeDumper(Emitter, Serializer, SafeRepresenter, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        Emitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width,
-                allow_unicode=allow_unicode, line_break=line_break)
-        Serializer.__init__(self, encoding=encoding,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        SafeRepresenter.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
-class Dumper(Emitter, Serializer, Representer, Resolver):
-
-    def __init__(self, stream,
-            default_style=None, default_flow_style=None,
-            canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None,
-            encoding=None, explicit_start=None, explicit_end=None,
-            version=None, tags=None):
-        Emitter.__init__(self, stream, canonical=canonical,
-                indent=indent, width=width,
-                allow_unicode=allow_unicode, line_break=line_break)
-        Serializer.__init__(self, encoding=encoding,
-                explicit_start=explicit_start, explicit_end=explicit_end,
-                version=version, tags=tags)
-        Representer.__init__(self, default_style=default_style,
-                default_flow_style=default_flow_style)
-        Resolver.__init__(self)
-
diff --git a/python.d/python_modules/pyyaml3/emitter.py b/python.d/python_modules/pyyaml3/emitter.py
deleted file mode 100644
index 34cb145a..00000000
--- a/python.d/python_modules/pyyaml3/emitter.py
+++ /dev/null
@@ -1,1137 +0,0 @@
-
-# Emitter expects events obeying the following grammar:
-# stream ::= STREAM-START document* STREAM-END
-# document ::= DOCUMENT-START node DOCUMENT-END
-# node ::= SCALAR | sequence | mapping
-# sequence ::= SEQUENCE-START node* SEQUENCE-END
-# mapping ::= MAPPING-START (node node)* MAPPING-END
-
-__all__ = ['Emitter', 'EmitterError']
-
-from .error import YAMLError
-from .events import *
-
-class EmitterError(YAMLError):
-    pass
-
-class ScalarAnalysis:
-    def __init__(self, scalar, empty, multiline,
-            allow_flow_plain, allow_block_plain,
-            allow_single_quoted, allow_double_quoted,
-            allow_block):
-        self.scalar = scalar
-        self.empty = empty
-        self.multiline = multiline
-        self.allow_flow_plain = allow_flow_plain
-        self.allow_block_plain = allow_block_plain
-        self.allow_single_quoted = allow_single_quoted
-        self.allow_double_quoted = allow_double_quoted
-        self.allow_block = allow_block
-
-class Emitter:
-
-    DEFAULT_TAG_PREFIXES = {
-        '!' : '!',
-        'tag:yaml.org,2002:' : '!!',
-    }
-
-    def __init__(self, stream, canonical=None, indent=None, width=None,
-            allow_unicode=None, line_break=None):
-
-        # The stream should have the methods `write` and possibly `flush`.
-        self.stream = stream
-
-        # Encoding can be overriden by STREAM-START.
-        self.encoding = None
-
-        # Emitter is a state machine with a stack of states to handle nested
-        # structures.
-        self.states = []
-        self.state = self.expect_stream_start
-
-        # Current event and the event queue.
-        self.events = []
-        self.event = None
-
-        # The current indentation level and the stack of previous indents.
-        self.indents = []
-        self.indent = None
-
-        # Flow level.
-        self.flow_level = 0
-
-        # Contexts.
-        self.root_context = False
-        self.sequence_context = False
-        self.mapping_context = False
-        self.simple_key_context = False
-
-        # Characteristics of the last emitted character:
-        #  - current position.
-        #  - is it a whitespace?
-        #  - is it an indention character
-        #    (indentation space, '-', '?', or ':')?
-        self.line = 0
-        self.column = 0
-        self.whitespace = True
-        self.indention = True
-
-        # Whether the document requires an explicit document indicator
-        self.open_ended = False
-
-        # Formatting details.
-        self.canonical = canonical
-        self.allow_unicode = allow_unicode
-        self.best_indent = 2
-        if indent and 1 < indent < 10:
-            self.best_indent = indent
-        self.best_width = 80
-        if width and width > self.best_indent*2:
-            self.best_width = width
-        self.best_line_break = '\n'
-        if line_break in ['\r', '\n', '\r\n']:
-            self.best_line_break = line_break
-
-        # Tag prefixes.
-        self.tag_prefixes = None
-
-        # Prepared anchor and tag.
-        self.prepared_anchor = None
-        self.prepared_tag = None
-
-        # Scalar analysis and style.
-        self.analysis = None
-        self.style = None
-
-    def dispose(self):
-        # Reset the state attributes (to clear self-references)
-        self.states = []
-        self.state = None
-
-    def emit(self, event):
-        self.events.append(event)
-        while not self.need_more_events():
-            self.event = self.events.pop(0)
-            self.state()
-            self.event = None
-
-    # In some cases, we wait for a few next events before emitting.
-
-    def need_more_events(self):
-        if not self.events:
-            return True
-        event = self.events[0]
-        if isinstance(event, DocumentStartEvent):
-            return self.need_events(1)
-        elif isinstance(event, SequenceStartEvent):
-            return self.need_events(2)
-        elif isinstance(event, MappingStartEvent):
-            return self.need_events(3)
-        else:
-            return False
-
-    def need_events(self, count):
-        level = 0
-        for event in self.events[1:]:
-            if isinstance(event, (DocumentStartEvent, CollectionStartEvent)):
-                level += 1
-            elif isinstance(event, (DocumentEndEvent, CollectionEndEvent)):
-                level -= 1
-            elif isinstance(event, StreamEndEvent):
-                level = -1
-            if level < 0:
-                return False
-        return (len(self.events) < count+1)
-
-    def increase_indent(self, flow=False, indentless=False):
-        self.indents.append(self.indent)
-        if self.indent is None:
-            if flow:
-                self.indent = self.best_indent
-            else:
-                self.indent = 0
-        elif not indentless:
-            self.indent += self.best_indent
-
-    # States.
-
-    # Stream handlers.
-
-    def expect_stream_start(self):
-        if isinstance(self.event, StreamStartEvent):
-            if self.event.encoding and not hasattr(self.stream, 'encoding'):
-                self.encoding = self.event.encoding
-            self.write_stream_start()
-            self.state = self.expect_first_document_start
-        else:
-            raise EmitterError("expected StreamStartEvent, but got %s"
-                    % self.event)
-
-    def expect_nothing(self):
-        raise EmitterError("expected nothing, but got %s" % self.event)
-
-    # Document handlers.
-
-    def expect_first_document_start(self):
-        return self.expect_document_start(first=True)
-
-    def expect_document_start(self, first=False):
-        if isinstance(self.event, DocumentStartEvent):
-            if (self.event.version or self.event.tags) and self.open_ended:
-                self.write_indicator('...', True)
-                self.write_indent()
-            if self.event.version:
-                version_text = self.prepare_version(self.event.version)
-                self.write_version_directive(version_text)
-            self.tag_prefixes = self.DEFAULT_TAG_PREFIXES.copy()
-            if self.event.tags:
-                handles = sorted(self.event.tags.keys())
-                for handle in handles:
-                    prefix = self.event.tags[handle]
-                    self.tag_prefixes[prefix] = handle
-                    handle_text = self.prepare_tag_handle(handle)
-                    prefix_text = self.prepare_tag_prefix(prefix)
-                    self.write_tag_directive(handle_text, prefix_text)
-            implicit = (first and not self.event.explicit and not self.canonical
-                    and not self.event.version and not self.event.tags
-                    and not self.check_empty_document())
-            if not implicit:
-                self.write_indent()
-                self.write_indicator('---', True)
-                if self.canonical:
-                    self.write_indent()
-            self.state = self.expect_document_root
-        elif isinstance(self.event, StreamEndEvent):
-            if self.open_ended:
-                self.write_indicator('...', True)
-                self.write_indent()
-            self.write_stream_end()
-            self.state = self.expect_nothing
-        else:
-            raise EmitterError("expected DocumentStartEvent, but got %s"
-                    % self.event)
-
-    def expect_document_end(self):
-        if isinstance(self.event, DocumentEndEvent):
-            self.write_indent()
-            if self.event.explicit:
-                self.write_indicator('...', True)
-                self.write_indent()
-            self.flush_stream()
-            self.state = self.expect_document_start
-        else:
-            raise EmitterError("expected DocumentEndEvent, but got %s"
-                    % self.event)
-
-    def expect_document_root(self):
-        self.states.append(self.expect_document_end)
-        self.expect_node(root=True)
-
-    # Node handlers.
-
-    def expect_node(self, root=False, sequence=False, mapping=False,
-            simple_key=False):
-        self.root_context = root
-        self.sequence_context = sequence
-        self.mapping_context = mapping
-        self.simple_key_context = simple_key
-        if isinstance(self.event, AliasEvent):
-            self.expect_alias()
-        elif isinstance(self.event, (ScalarEvent, CollectionStartEvent)):
-            self.process_anchor('&')
-            self.process_tag()
-            if isinstance(self.event, ScalarEvent):
-                self.expect_scalar()
-            elif isinstance(self.event, SequenceStartEvent):
-                if self.flow_level or self.canonical or self.event.flow_style   \
-                        or self.check_empty_sequence():
-                    self.expect_flow_sequence()
-                else:
-                    self.expect_block_sequence()
-            elif isinstance(self.event, MappingStartEvent):
-                if self.flow_level or self.canonical or self.event.flow_style   \
-                        or self.check_empty_mapping():
-                    self.expect_flow_mapping()
-                else:
-                    self.expect_block_mapping()
-        else:
-            raise EmitterError("expected NodeEvent, but got %s" % self.event)
-
-    def expect_alias(self):
-        if self.event.anchor is None:
-            raise EmitterError("anchor is not specified for alias")
-        self.process_anchor('*')
-        self.state = self.states.pop()
-
-    def expect_scalar(self):
-        self.increase_indent(flow=True)
-        self.process_scalar()
-        self.indent = self.indents.pop()
-        self.state = self.states.pop()
-
-    # Flow sequence handlers.
-
-    def expect_flow_sequence(self):
-        self.write_indicator('[', True, whitespace=True)
-        self.flow_level += 1
-        self.increase_indent(flow=True)
-        self.state = self.expect_first_flow_sequence_item
-
-    def expect_first_flow_sequence_item(self):
-        if isinstance(self.event, SequenceEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            self.write_indicator(']', False)
-            self.state = self.states.pop()
-        else:
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            self.states.append(self.expect_flow_sequence_item)
-            self.expect_node(sequence=True)
-
-    def expect_flow_sequence_item(self):
-        if isinstance(self.event, SequenceEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            if self.canonical:
-                self.write_indicator(',', False)
-                self.write_indent()
-            self.write_indicator(']', False)
-            self.state = self.states.pop()
-        else:
-            self.write_indicator(',', False)
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            self.states.append(self.expect_flow_sequence_item)
-            self.expect_node(sequence=True)
-
-    # Flow mapping handlers.
-
-    def expect_flow_mapping(self):
-        self.write_indicator('{', True, whitespace=True)
-        self.flow_level += 1
-        self.increase_indent(flow=True)
-        self.state = self.expect_first_flow_mapping_key
-
-    def expect_first_flow_mapping_key(self):
-        if isinstance(self.event, MappingEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            self.write_indicator('}', False)
-            self.state = self.states.pop()
-        else:
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            if not self.canonical and self.check_simple_key():
-                self.states.append(self.expect_flow_mapping_simple_value)
-                self.expect_node(mapping=True, simple_key=True)
-            else:
-                self.write_indicator('?', True)
-                self.states.append(self.expect_flow_mapping_value)
-                self.expect_node(mapping=True)
-
-    def expect_flow_mapping_key(self):
-        if isinstance(self.event, MappingEndEvent):
-            self.indent = self.indents.pop()
-            self.flow_level -= 1
-            if self.canonical:
-                self.write_indicator(',', False)
-                self.write_indent()
-            self.write_indicator('}', False)
-            self.state = self.states.pop()
-        else:
-            self.write_indicator(',', False)
-            if self.canonical or self.column > self.best_width:
-                self.write_indent()
-            if not self.canonical and self.check_simple_key():
-                self.states.append(self.expect_flow_mapping_simple_value)
-                self.expect_node(mapping=True, simple_key=True)
-            else:
-                self.write_indicator('?', True)
-                self.states.append(self.expect_flow_mapping_value)
-                self.expect_node(mapping=True)
-
-    def expect_flow_mapping_simple_value(self):
-        self.write_indicator(':', False)
-        self.states.append(self.expect_flow_mapping_key)
-        self.expect_node(mapping=True)
-
-    def expect_flow_mapping_value(self):
-        if self.canonical or self.column > self.best_width:
-            self.write_indent()
-        self.write_indicator(':', True)
-        self.states.append(self.expect_flow_mapping_key)
-        self.expect_node(mapping=True)
-
-    # Block sequence handlers.
-
-    def expect_block_sequence(self):
-        indentless = (self.mapping_context and not self.indention)
-        self.increase_indent(flow=False, indentless=indentless)
-        self.state = self.expect_first_block_sequence_item
-
-    def expect_first_block_sequence_item(self):
-        return self.expect_block_sequence_item(first=True)
-
-    def expect_block_sequence_item(self, first=False):
-        if not first and isinstance(self.event, SequenceEndEvent):
-            self.indent = self.indents.pop()
-            self.state = self.states.pop()
-        else:
-            self.write_indent()
-            self.write_indicator('-', True, indention=True)
-            self.states.append(self.expect_block_sequence_item)
-            self.expect_node(sequence=True)
-
-    # Block mapping handlers.
-
-    def expect_block_mapping(self):
-        self.increase_indent(flow=False)
-        self.state = self.expect_first_block_mapping_key
-
-    def expect_first_block_mapping_key(self):
-        return self.expect_block_mapping_key(first=True)
-
-    def expect_block_mapping_key(self, first=False):
-        if not first and isinstance(self.event, MappingEndEvent):
-            self.indent = self.indents.pop()
-            self.state = self.states.pop()
-        else:
-            self.write_indent()
-            if self.check_simple_key():
-                self.states.append(self.expect_block_mapping_simple_value)
-                self.expect_node(mapping=True, simple_key=True)
-            else:
-                self.write_indicator('?', True, indention=True)
-                self.states.append(self.expect_block_mapping_value)
-                self.expect_node(mapping=True)
-
-    def expect_block_mapping_simple_value(self):
-        self.write_indicator(':', False)
-        self.states.append(self.expect_block_mapping_key)
-        self.expect_node(mapping=True)
-
-    def expect_block_mapping_value(self):
-        self.write_indent()
-        self.write_indicator(':', True, indention=True)
-        self.states.append(self.expect_block_mapping_key)
-        self.expect_node(mapping=True)
-
-    # Checkers.
-
-    def check_empty_sequence(self):
-        return (isinstance(self.event, SequenceStartEvent) and self.events
-                and isinstance(self.events[0], SequenceEndEvent))
-
-    def check_empty_mapping(self):
-        return (isinstance(self.event, MappingStartEvent) and self.events
-                and isinstance(self.events[0], MappingEndEvent))
-
-    def check_empty_document(self):
-        if not isinstance(self.event, DocumentStartEvent) or not self.events:
-            return False
-        event = self.events[0]
-        return (isinstance(event, ScalarEvent) and event.anchor is None
-                and event.tag is None and event.implicit and event.value == '')
-
-    def check_simple_key(self):
-        length = 0
-        if isinstance(self.event, NodeEvent) and self.event.anchor is not None:
-            if self.prepared_anchor is None:
-                self.prepared_anchor = self.prepare_anchor(self.event.anchor)
-            length += len(self.prepared_anchor)
-        if isinstance(self.event, (ScalarEvent, CollectionStartEvent))  \
-                and self.event.tag is not None:
-            if self.prepared_tag is None:
-                self.prepared_tag = self.prepare_tag(self.event.tag)
-            length += len(self.prepared_tag)
-        if isinstance(self.event, ScalarEvent):
-            if self.analysis is None:
-                self.analysis = self.analyze_scalar(self.event.value)
-            length += len(self.analysis.scalar)
-        return (length < 128 and (isinstance(self.event, AliasEvent)
-            or (isinstance(self.event, ScalarEvent)
-                    and not self.analysis.empty and not self.analysis.multiline)
-            or self.check_empty_sequence() or self.check_empty_mapping()))
-
-    # Anchor, Tag, and Scalar processors.
-
-    def process_anchor(self, indicator):
-        if self.event.anchor is None:
-            self.prepared_anchor = None
-            return
-        if self.prepared_anchor is None:
-            self.prepared_anchor = self.prepare_anchor(self.event.anchor)
-        if self.prepared_anchor:
-            self.write_indicator(indicator+self.prepared_anchor, True)
-        self.prepared_anchor = None
-
-    def process_tag(self):
-        tag = self.event.tag
-        if isinstance(self.event, ScalarEvent):
-            if self.style is None:
-                self.style = self.choose_scalar_style()
-            if ((not self.canonical or tag is None) and
-                ((self.style == '' and self.event.implicit[0])
-                        or (self.style != '' and self.event.implicit[1]))):
-                self.prepared_tag = None
-                return
-            if self.event.implicit[0] and tag is None:
-                tag = '!'
-                self.prepared_tag = None
-        else:
-            if (not self.canonical or tag is None) and self.event.implicit:
-                self.prepared_tag = None
-                return
-        if tag is None:
-            raise EmitterError("tag is not specified")
-        if self.prepared_tag is None:
-            self.prepared_tag = self.prepare_tag(tag)
-        if self.prepared_tag:
-            self.write_indicator(self.prepared_tag, True)
-        self.prepared_tag = None
-
-    def choose_scalar_style(self):
-        if self.analysis is None:
-            self.analysis = self.analyze_scalar(self.event.value)
-        if self.event.style == '"' or self.canonical:
-            return '"'
-        if not self.event.style and self.event.implicit[0]:
-            if (not (self.simple_key_context and
-                    (self.analysis.empty or self.analysis.multiline))
-                and (self.flow_level and self.analysis.allow_flow_plain
-                    or (not self.flow_level and self.analysis.allow_block_plain))):
-                return ''
-        if self.event.style and self.event.style in '|>':
-            if (not self.flow_level and not self.simple_key_context
-                    and self.analysis.allow_block):
-                return self.event.style
-        if not self.event.style or self.event.style == '\'':
-            if (self.analysis.allow_single_quoted and
-                    not (self.simple_key_context and self.analysis.multiline)):
-                return '\''
-        return '"'
-
-    def process_scalar(self):
-        if self.analysis is None:
-            self.analysis = self.analyze_scalar(self.event.value)
-        if self.style is None:
-            self.style = self.choose_scalar_style()
-        split = (not self.simple_key_context)
-        #if self.analysis.multiline and split    \
-        #        and (not self.style or self.style in '\'\"'):
-        #    self.write_indent()
-        if self.style == '"':
-            self.write_double_quoted(self.analysis.scalar, split)
-        elif self.style == '\'':
-            self.write_single_quoted(self.analysis.scalar, split)
-        elif self.style == '>':
-            self.write_folded(self.analysis.scalar)
-        elif self.style == '|':
-            self.write_literal(self.analysis.scalar)
-        else:
-            self.write_plain(self.analysis.scalar, split)
-        self.analysis = None
-        self.style = None
-
-    # Analyzers.
-
-    def prepare_version(self, version):
-        major, minor = version
-        if major != 1:
-            raise EmitterError("unsupported YAML version: %d.%d" % (major, minor))
-        return '%d.%d' % (major, minor)
-
-    def prepare_tag_handle(self, handle):
-        if not handle:
-            raise EmitterError("tag handle must not be empty")
-        if handle[0] != '!' or handle[-1] != '!':
-            raise EmitterError("tag handle must start and end with '!': %r" % handle)
-        for ch in handle[1:-1]:
-            if not ('0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'    \
-                    or ch in '-_'):
-                raise EmitterError("invalid character %r in the tag handle: %r"
-                        % (ch, handle))
-        return handle
-
-    def prepare_tag_prefix(self, prefix):
-        if not prefix:
-            raise EmitterError("tag prefix must not be empty")
-        chunks = []
-        start = end = 0
-        if prefix[0] == '!':
-            end = 1
-        while end < len(prefix):
-            ch = prefix[end]
-            if '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' \
-                    or ch in '-;/?!:@&=+$,_.~*\'()[]':
-                end += 1
-            else:
-                if start < end:
-                    chunks.append(prefix[start:end])
-                start = end = end+1
-                data = ch.encode('utf-8')
-                for ch in data:
-                    chunks.append('%%%02X' % ord(ch))
-        if start < end:
-            chunks.append(prefix[start:end])
-        return ''.join(chunks)
-
-    def prepare_tag(self, tag):
-        if not tag:
-            raise EmitterError("tag must not be empty")
-        if tag == '!':
-            return tag
-        handle = None
-        suffix = tag
-        prefixes = sorted(self.tag_prefixes.keys())
-        for prefix in prefixes:
-            if tag.startswith(prefix)   \
-                    and (prefix == '!' or len(prefix) < len(tag)):
-                handle = self.tag_prefixes[prefix]
-                suffix = tag[len(prefix):]
-        chunks = []
-        start = end = 0
-        while end < len(suffix):
-            ch = suffix[end]
-            if '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' \
-                    or ch in '-;/?:@&=+$,_.~*\'()[]'   \
-                    or (ch == '!' and handle != '!'):
-                end += 1
-            else:
-                if start < end:
-                    chunks.append(suffix[start:end])
-                start = end = end+1
-                data = ch.encode('utf-8')
-                for ch in data:
-                    chunks.append('%%%02X' % ord(ch))
-        if start < end:
-            chunks.append(suffix[start:end])
-        suffix_text = ''.join(chunks)
-        if handle:
-            return '%s%s' % (handle, suffix_text)
-        else:
-            return '!<%s>' % suffix_text
-
-    def prepare_anchor(self, anchor):
-        if not anchor:
-            raise EmitterError("anchor must not be empty")
-        for ch in anchor:
-            if not ('0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'    \
-                    or ch in '-_'):
-                raise EmitterError("invalid character %r in the anchor: %r"
-                        % (ch, anchor))
-        return anchor
-
-    def analyze_scalar(self, scalar):
-
-        # Empty scalar is a special case.
-        if not scalar:
-            return ScalarAnalysis(scalar=scalar, empty=True, multiline=False,
-                    allow_flow_plain=False, allow_block_plain=True,
-                    allow_single_quoted=True, allow_double_quoted=True,
-                    allow_block=False)
-
-        # Indicators and special characters.
-        block_indicators = False
-        flow_indicators = False
-        line_breaks = False
-        special_characters = False
-
-        # Important whitespace combinations.
-        leading_space = False
-        leading_break = False
-        trailing_space = False
-        trailing_break = False
-        break_space = False
-        space_break = False
-
-        # Check document indicators.
-        if scalar.startswith('---') or scalar.startswith('...'):
-            block_indicators = True
-            flow_indicators = True
-
-        # First character or preceded by a whitespace.
-        preceeded_by_whitespace = True
-
-        # Last character or followed by a whitespace.
-        followed_by_whitespace = (len(scalar) == 1 or
-                scalar[1] in '\0 \t\r\n\x85\u2028\u2029')
-
-        # The previous character is a space.
-        previous_space = False
-
-        # The previous character is a break.
-        previous_break = False
-
-        index = 0
-        while index < len(scalar):
-            ch = scalar[index]
-
-            # Check for indicators.
-            if index == 0:
-                # Leading indicators are special characters.
-                if ch in '#,[]{}&*!|>\'\"%@`': 
-                    flow_indicators = True
-                    block_indicators = True
-                if ch in '?:':
-                    flow_indicators = True
-                    if followed_by_whitespace:
-                        block_indicators = True
-                if ch == '-' and followed_by_whitespace:
-                    flow_indicators = True
-                    block_indicators = True
-            else:
-                # Some indicators cannot appear within a scalar as well.
-                if ch in ',?[]{}':
-                    flow_indicators = True
-                if ch == ':':
-                    flow_indicators = True
-                    if followed_by_whitespace:
-                        block_indicators = True
-                if ch == '#' and preceeded_by_whitespace:
-                    flow_indicators = True
-                    block_indicators = True
-
-            # Check for line breaks, special, and unicode characters.
-            if ch in '\n\x85\u2028\u2029':
-                line_breaks = True
-            if not (ch == '\n' or '\x20' <= ch <= '\x7E'):
-                if (ch == '\x85' or '\xA0' <= ch <= '\uD7FF'
-                        or '\uE000' <= ch <= '\uFFFD') and ch != '\uFEFF':
-                    unicode_characters = True
-                    if not self.allow_unicode:
-                        special_characters = True
-                else:
-                    special_characters = True
-
-            # Detect important whitespace combinations.
-            if ch == ' ':
-                if index == 0:
-                    leading_space = True
-                if index == len(scalar)-1:
-                    trailing_space = True
-                if previous_break:
-                    break_space = True
-                previous_space = True
-                previous_break = False
-            elif ch in '\n\x85\u2028\u2029':
-                if index == 0:
-                    leading_break = True
-                if index == len(scalar)-1:
-                    trailing_break = True
-                if previous_space:
-                    space_break = True
-                previous_space = False
-                previous_break = True
-            else:
-                previous_space = False
-                previous_break = False
-
-            # Prepare for the next character.
-            index += 1
-            preceeded_by_whitespace = (ch in '\0 \t\r\n\x85\u2028\u2029')
-            followed_by_whitespace = (index+1 >= len(scalar) or
-                    scalar[index+1] in '\0 \t\r\n\x85\u2028\u2029')
-
-        # Let's decide what styles are allowed.
-        allow_flow_plain = True
-        allow_block_plain = True
-        allow_single_quoted = True
-        allow_double_quoted = True
-        allow_block = True
-
-        # Leading and trailing whitespaces are bad for plain scalars.
-        if (leading_space or leading_break
-                or trailing_space or trailing_break):
-            allow_flow_plain = allow_block_plain = False
-
-        # We do not permit trailing spaces for block scalars.
-        if trailing_space:
-            allow_block = False
-
-        # Spaces at the beginning of a new line are only acceptable for block
-        # scalars.
-        if break_space:
-            allow_flow_plain = allow_block_plain = allow_single_quoted = False
-
-        # Spaces followed by breaks, as well as special character are only
-        # allowed for double quoted scalars.
-        if space_break or special_characters:
-            allow_flow_plain = allow_block_plain =  \
-            allow_single_quoted = allow_block = False
-
-        # Although the plain scalar writer supports breaks, we never emit
-        # multiline plain scalars.
-        if line_breaks:
-            allow_flow_plain = allow_block_plain = False
-
-        # Flow indicators are forbidden for flow plain scalars.
-        if flow_indicators:
-            allow_flow_plain = False
-
-        # Block indicators are forbidden for block plain scalars.
-        if block_indicators:
-            allow_block_plain = False
-
-        return ScalarAnalysis(scalar=scalar,
-                empty=False, multiline=line_breaks,
-                allow_flow_plain=allow_flow_plain,
-                allow_block_plain=allow_block_plain,
-                allow_single_quoted=allow_single_quoted,
-                allow_double_quoted=allow_double_quoted,
-                allow_block=allow_block)
-
-    # Writers.
-
-    def flush_stream(self):
-        if hasattr(self.stream, 'flush'):
-            self.stream.flush()
-
-    def write_stream_start(self):
-        # Write BOM if needed.
-        if self.encoding and self.encoding.startswith('utf-16'):
-            self.stream.write('\uFEFF'.encode(self.encoding))
-
-    def write_stream_end(self):
-        self.flush_stream()
-
-    def write_indicator(self, indicator, need_whitespace,
-            whitespace=False, indention=False):
-        if self.whitespace or not need_whitespace:
-            data = indicator
-        else:
-            data = ' '+indicator
-        self.whitespace = whitespace
-        self.indention = self.indention and indention
-        self.column += len(data)
-        self.open_ended = False
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-
-    def write_indent(self):
-        indent = self.indent or 0
-        if not self.indention or self.column > indent   \
-                or (self.column == indent and not self.whitespace):
-            self.write_line_break()
-        if self.column < indent:
-            self.whitespace = True
-            data = ' '*(indent-self.column)
-            self.column = indent
-            if self.encoding:
-                data = data.encode(self.encoding)
-            self.stream.write(data)
-
-    def write_line_break(self, data=None):
-        if data is None:
-            data = self.best_line_break
-        self.whitespace = True
-        self.indention = True
-        self.line += 1
-        self.column = 0
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-
-    def write_version_directive(self, version_text):
-        data = '%%YAML %s' % version_text
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-        self.write_line_break()
-
-    def write_tag_directive(self, handle_text, prefix_text):
-        data = '%%TAG %s %s' % (handle_text, prefix_text)
-        if self.encoding:
-            data = data.encode(self.encoding)
-        self.stream.write(data)
-        self.write_line_break()
-
-    # Scalar streams.
-
-    def write_single_quoted(self, text, split=True):
-        self.write_indicator('\'', True)
-        spaces = False
-        breaks = False
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if spaces:
-                if ch is None or ch != ' ':
-                    if start+1 == end and self.column > self.best_width and split   \
-                            and start != 0 and end != len(text):
-                        self.write_indent()
-                    else:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                    start = end
-            elif breaks:
-                if ch is None or ch not in '\n\x85\u2028\u2029':
-                    if text[start] == '\n':
-                        self.write_line_break()
-                    for br in text[start:end]:
-                        if br == '\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    self.write_indent()
-                    start = end
-            else:
-                if ch is None or ch in ' \n\x85\u2028\u2029' or ch == '\'':
-                    if start < end:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                        start = end
-            if ch == '\'':
-                data = '\'\''
-                self.column += 2
-                if self.encoding:
-                    data = data.encode(self.encoding)
-                self.stream.write(data)
-                start = end + 1
-            if ch is not None:
-                spaces = (ch == ' ')
-                breaks = (ch in '\n\x85\u2028\u2029')
-            end += 1
-        self.write_indicator('\'', False)
-
-    ESCAPE_REPLACEMENTS = {
-        '\0':       '0',
-        '\x07':     'a',
-        '\x08':     'b',
-        '\x09':     't',
-        '\x0A':     'n',
-        '\x0B':     'v',
-        '\x0C':     'f',
-        '\x0D':     'r',
-        '\x1B':     'e',
-        '\"':       '\"',
-        '\\':       '\\',
-        '\x85':     'N',
-        '\xA0':     '_',
-        '\u2028':   'L',
-        '\u2029':   'P',
-    }
-
-    def write_double_quoted(self, text, split=True):
-        self.write_indicator('"', True)
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if ch is None or ch in '"\\\x85\u2028\u2029\uFEFF' \
-                    or not ('\x20' <= ch <= '\x7E'
-                        or (self.allow_unicode
-                            and ('\xA0' <= ch <= '\uD7FF'
-                                or '\uE000' <= ch <= '\uFFFD'))):
-                if start < end:
-                    data = text[start:end]
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    start = end
-                if ch is not None:
-                    if ch in self.ESCAPE_REPLACEMENTS:
-                        data = '\\'+self.ESCAPE_REPLACEMENTS[ch]
-                    elif ch <= '\xFF':
-                        data = '\\x%02X' % ord(ch)
-                    elif ch <= '\uFFFF':
-                        data = '\\u%04X' % ord(ch)
-                    else:
-                        data = '\\U%08X' % ord(ch)
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    start = end+1
-            if 0 < end < len(text)-1 and (ch == ' ' or start >= end)    \
-                    and self.column+(end-start) > self.best_width and split:
-                data = text[start:end]+'\\'
-                if start < end:
-                    start = end
-                self.column += len(data)
-                if self.encoding:
-                    data = data.encode(self.encoding)
-                self.stream.write(data)
-                self.write_indent()
-                self.whitespace = False
-                self.indention = False
-                if text[start] == ' ':
-                    data = '\\'
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-            end += 1
-        self.write_indicator('"', False)
-
-    def determine_block_hints(self, text):
-        hints = ''
-        if text:
-            if text[0] in ' \n\x85\u2028\u2029':
-                hints += str(self.best_indent)
-            if text[-1] not in '\n\x85\u2028\u2029':
-                hints += '-'
-            elif len(text) == 1 or text[-2] in '\n\x85\u2028\u2029':
-                hints += '+'
-        return hints
-
-    def write_folded(self, text):
-        hints = self.determine_block_hints(text)
-        self.write_indicator('>'+hints, True)
-        if hints[-1:] == '+':
-            self.open_ended = True
-        self.write_line_break()
-        leading_space = True
-        spaces = False
-        breaks = True
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if breaks:
-                if ch is None or ch not in '\n\x85\u2028\u2029':
-                    if not leading_space and ch is not None and ch != ' '   \
-                            and text[start] == '\n':
-                        self.write_line_break()
-                    leading_space = (ch == ' ')
-                    for br in text[start:end]:
-                        if br == '\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    if ch is not None:
-                        self.write_indent()
-                    start = end
-            elif spaces:
-                if ch != ' ':
-                    if start+1 == end and self.column > self.best_width:
-                        self.write_indent()
-                    else:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                    start = end
-            else:
-                if ch is None or ch in ' \n\x85\u2028\u2029':
-                    data = text[start:end]
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    if ch is None:
-                        self.write_line_break()
-                    start = end
-            if ch is not None:
-                breaks = (ch in '\n\x85\u2028\u2029')
-                spaces = (ch == ' ')
-            end += 1
-
-    def write_literal(self, text):
-        hints = self.determine_block_hints(text)
-        self.write_indicator('|'+hints, True)
-        if hints[-1:] == '+':
-            self.open_ended = True
-        self.write_line_break()
-        breaks = True
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if breaks:
-                if ch is None or ch not in '\n\x85\u2028\u2029':
-                    for br in text[start:end]:
-                        if br == '\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    if ch is not None:
-                        self.write_indent()
-                    start = end
-            else:
-                if ch is None or ch in '\n\x85\u2028\u2029':
-                    data = text[start:end]
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    if ch is None:
-                        self.write_line_break()
-                    start = end
-            if ch is not None:
-                breaks = (ch in '\n\x85\u2028\u2029')
-            end += 1
-
-    def write_plain(self, text, split=True):
-        if self.root_context:
-            self.open_ended = True
-        if not text:
-            return
-        if not self.whitespace:
-            data = ' '
-            self.column += len(data)
-            if self.encoding:
-                data = data.encode(self.encoding)
-            self.stream.write(data)
-        self.whitespace = False
-        self.indention = False
-        spaces = False
-        breaks = False
-        start = end = 0
-        while end <= len(text):
-            ch = None
-            if end < len(text):
-                ch = text[end]
-            if spaces:
-                if ch != ' ':
-                    if start+1 == end and self.column > self.best_width and split:
-                        self.write_indent()
-                        self.whitespace = False
-                        self.indention = False
-                    else:
-                        data = text[start:end]
-                        self.column += len(data)
-                        if self.encoding:
-                            data = data.encode(self.encoding)
-                        self.stream.write(data)
-                    start = end
-            elif breaks:
-                if ch not in '\n\x85\u2028\u2029':
-                    if text[start] == '\n':
-                        self.write_line_break()
-                    for br in text[start:end]:
-                        if br == '\n':
-                            self.write_line_break()
-                        else:
-                            self.write_line_break(br)
-                    self.write_indent()
-                    self.whitespace = False
-                    self.indention = False
-                    start = end
-            else:
-                if ch is None or ch in ' \n\x85\u2028\u2029':
-                    data = text[start:end]
-                    self.column += len(data)
-                    if self.encoding:
-                        data = data.encode(self.encoding)
-                    self.stream.write(data)
-                    start = end
-            if ch is not None:
-                spaces = (ch == ' ')
-                breaks = (ch in '\n\x85\u2028\u2029')
-            end += 1
-
diff --git a/python.d/python_modules/pyyaml3/error.py b/python.d/python_modules/pyyaml3/error.py
deleted file mode 100644
index b796b4dc..00000000
--- a/python.d/python_modules/pyyaml3/error.py
+++ /dev/null
@@ -1,75 +0,0 @@
-
-__all__ = ['Mark', 'YAMLError', 'MarkedYAMLError']
-
-class Mark:
-
-    def __init__(self, name, index, line, column, buffer, pointer):
-        self.name = name
-        self.index = index
-        self.line = line
-        self.column = column
-        self.buffer = buffer
-        self.pointer = pointer
-
-    def get_snippet(self, indent=4, max_length=75):
-        if self.buffer is None:
-            return None
-        head = ''
-        start = self.pointer
-        while start > 0 and self.buffer[start-1] not in '\0\r\n\x85\u2028\u2029':
-            start -= 1
-            if self.pointer-start > max_length/2-1:
-                head = ' ... '
-                start += 5
-                break
-        tail = ''
-        end = self.pointer
-        while end < len(self.buffer) and self.buffer[end] not in '\0\r\n\x85\u2028\u2029':
-            end += 1
-            if end-self.pointer > max_length/2-1:
-                tail = ' ... '
-                end -= 5
-                break
-        snippet = self.buffer[start:end]
-        return ' '*indent + head + snippet + tail + '\n'  \
-                + ' '*(indent+self.pointer-start+len(head)) + '^'
-
-    def __str__(self):
-        snippet = self.get_snippet()
-        where = "  in \"%s\", line %d, column %d"   \
-                % (self.name, self.line+1, self.column+1)
-        if snippet is not None:
-            where += ":\n"+snippet
-        return where
-
-class YAMLError(Exception):
-    pass
-
-class MarkedYAMLError(YAMLError):
-
-    def __init__(self, context=None, context_mark=None,
-            problem=None, problem_mark=None, note=None):
-        self.context = context
-        self.context_mark = context_mark
-        self.problem = problem
-        self.problem_mark = problem_mark
-        self.note = note
-
-    def __str__(self):
-        lines = []
-        if self.context is not None:
-            lines.append(self.context)
-        if self.context_mark is not None  \
-            and (self.problem is None or self.problem_mark is None
-                    or self.context_mark.name != self.problem_mark.name
-                    or self.context_mark.line != self.problem_mark.line
-                    or self.context_mark.column != self.problem_mark.column):
-            lines.append(str(self.context_mark))
-        if self.problem is not None:
-            lines.append(self.problem)
-        if self.problem_mark is not None:
-            lines.append(str(self.problem_mark))
-        if self.note is not None:
-            lines.append(self.note)
-        return '\n'.join(lines)
-
diff --git a/python.d/python_modules/pyyaml3/events.py b/python.d/python_modules/pyyaml3/events.py
deleted file mode 100644
index f79ad389..00000000
--- a/python.d/python_modules/pyyaml3/events.py
+++ /dev/null
@@ -1,86 +0,0 @@
-
-# Abstract classes.
-
-class Event(object):
-    def __init__(self, start_mark=None, end_mark=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-    def __repr__(self):
-        attributes = [key for key in ['anchor', 'tag', 'implicit', 'value']
-                if hasattr(self, key)]
-        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
-                for key in attributes])
-        return '%s(%s)' % (self.__class__.__name__, arguments)
-
-class NodeEvent(Event):
-    def __init__(self, anchor, start_mark=None, end_mark=None):
-        self.anchor = anchor
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class CollectionStartEvent(NodeEvent):
-    def __init__(self, anchor, tag, implicit, start_mark=None, end_mark=None,
-            flow_style=None):
-        self.anchor = anchor
-        self.tag = tag
-        self.implicit = implicit
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.flow_style = flow_style
-
-class CollectionEndEvent(Event):
-    pass
-
-# Implementations.
-
-class StreamStartEvent(Event):
-    def __init__(self, start_mark=None, end_mark=None, encoding=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.encoding = encoding
-
-class StreamEndEvent(Event):
-    pass
-
-class DocumentStartEvent(Event):
-    def __init__(self, start_mark=None, end_mark=None,
-            explicit=None, version=None, tags=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.explicit = explicit
-        self.version = version
-        self.tags = tags
-
-class DocumentEndEvent(Event):
-    def __init__(self, start_mark=None, end_mark=None,
-            explicit=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.explicit = explicit
-
-class AliasEvent(NodeEvent):
-    pass
-
-class ScalarEvent(NodeEvent):
-    def __init__(self, anchor, tag, implicit, value,
-            start_mark=None, end_mark=None, style=None):
-        self.anchor = anchor
-        self.tag = tag
-        self.implicit = implicit
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.style = style
-
-class SequenceStartEvent(CollectionStartEvent):
-    pass
-
-class SequenceEndEvent(CollectionEndEvent):
-    pass
-
-class MappingStartEvent(CollectionStartEvent):
-    pass
-
-class MappingEndEvent(CollectionEndEvent):
-    pass
-
diff --git a/python.d/python_modules/pyyaml3/loader.py b/python.d/python_modules/pyyaml3/loader.py
deleted file mode 100644
index 08c8f01b..00000000
--- a/python.d/python_modules/pyyaml3/loader.py
+++ /dev/null
@@ -1,40 +0,0 @@
-
-__all__ = ['BaseLoader', 'SafeLoader', 'Loader']
-
-from .reader import *
-from .scanner import *
-from .parser import *
-from .composer import *
-from .constructor import *
-from .resolver import *
-
-class BaseLoader(Reader, Scanner, Parser, Composer, BaseConstructor, BaseResolver):
-
-    def __init__(self, stream):
-        Reader.__init__(self, stream)
-        Scanner.__init__(self)
-        Parser.__init__(self)
-        Composer.__init__(self)
-        BaseConstructor.__init__(self)
-        BaseResolver.__init__(self)
-
-class SafeLoader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
-
-    def __init__(self, stream):
-        Reader.__init__(self, stream)
-        Scanner.__init__(self)
-        Parser.__init__(self)
-        Composer.__init__(self)
-        SafeConstructor.__init__(self)
-        Resolver.__init__(self)
-
-class Loader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
-
-    def __init__(self, stream):
-        Reader.__init__(self, stream)
-        Scanner.__init__(self)
-        Parser.__init__(self)
-        Composer.__init__(self)
-        Constructor.__init__(self)
-        Resolver.__init__(self)
-
diff --git a/python.d/python_modules/pyyaml3/nodes.py b/python.d/python_modules/pyyaml3/nodes.py
deleted file mode 100644
index c4f070c4..00000000
--- a/python.d/python_modules/pyyaml3/nodes.py
+++ /dev/null
@@ -1,49 +0,0 @@
-
-class Node(object):
-    def __init__(self, tag, value, start_mark, end_mark):
-        self.tag = tag
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-    def __repr__(self):
-        value = self.value
-        #if isinstance(value, list):
-        #    if len(value) == 0:
-        #        value = '<empty>'
-        #    elif len(value) == 1:
-        #        value = '<1 item>'
-        #    else:
-        #        value = '<%d items>' % len(value)
-        #else:
-        #    if len(value) > 75:
-        #        value = repr(value[:70]+u' ... ')
-        #    else:
-        #        value = repr(value)
-        value = repr(value)
-        return '%s(tag=%r, value=%s)' % (self.__class__.__name__, self.tag, value)
-
-class ScalarNode(Node):
-    id = 'scalar'
-    def __init__(self, tag, value,
-            start_mark=None, end_mark=None, style=None):
-        self.tag = tag
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.style = style
-
-class CollectionNode(Node):
-    def __init__(self, tag, value,
-            start_mark=None, end_mark=None, flow_style=None):
-        self.tag = tag
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.flow_style = flow_style
-
-class SequenceNode(CollectionNode):
-    id = 'sequence'
-
-class MappingNode(CollectionNode):
-    id = 'mapping'
-
diff --git a/python.d/python_modules/pyyaml3/parser.py b/python.d/python_modules/pyyaml3/parser.py
deleted file mode 100644
index 13a5995d..00000000
--- a/python.d/python_modules/pyyaml3/parser.py
+++ /dev/null
@@ -1,589 +0,0 @@
-
-# The following YAML grammar is LL(1) and is parsed by a recursive descent
-# parser.
-#
-# stream            ::= STREAM-START implicit_document? explicit_document* STREAM-END
-# implicit_document ::= block_node DOCUMENT-END*
-# explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-# block_node_or_indentless_sequence ::=
-#                       ALIAS
-#                       | properties (block_content | indentless_block_sequence)?
-#                       | block_content
-#                       | indentless_block_sequence
-# block_node        ::= ALIAS
-#                       | properties block_content?
-#                       | block_content
-# flow_node         ::= ALIAS
-#                       | properties flow_content?
-#                       | flow_content
-# properties        ::= TAG ANCHOR? | ANCHOR TAG?
-# block_content     ::= block_collection | flow_collection | SCALAR
-# flow_content      ::= flow_collection | SCALAR
-# block_collection  ::= block_sequence | block_mapping
-# flow_collection   ::= flow_sequence | flow_mapping
-# block_sequence    ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
-# indentless_sequence   ::= (BLOCK-ENTRY block_node?)+
-# block_mapping     ::= BLOCK-MAPPING_START
-#                       ((KEY block_node_or_indentless_sequence?)?
-#                       (VALUE block_node_or_indentless_sequence?)?)*
-#                       BLOCK-END
-# flow_sequence     ::= FLOW-SEQUENCE-START
-#                       (flow_sequence_entry FLOW-ENTRY)*
-#                       flow_sequence_entry?
-#                       FLOW-SEQUENCE-END
-# flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-# flow_mapping      ::= FLOW-MAPPING-START
-#                       (flow_mapping_entry FLOW-ENTRY)*
-#                       flow_mapping_entry?
-#                       FLOW-MAPPING-END
-# flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-#
-# FIRST sets:
-#
-# stream: { STREAM-START }
-# explicit_document: { DIRECTIVE DOCUMENT-START }
-# implicit_document: FIRST(block_node)
-# block_node: { ALIAS TAG ANCHOR SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# flow_node: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# block_content: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
-# flow_content: { FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
-# block_collection: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START }
-# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# block_sequence: { BLOCK-SEQUENCE-START }
-# block_mapping: { BLOCK-MAPPING-START }
-# block_node_or_indentless_sequence: { ALIAS ANCHOR TAG SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START BLOCK-ENTRY }
-# indentless_sequence: { ENTRY }
-# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
-# flow_sequence: { FLOW-SEQUENCE-START }
-# flow_mapping: { FLOW-MAPPING-START }
-# flow_sequence_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
-# flow_mapping_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
-
-__all__ = ['Parser', 'ParserError']
-
-from .error import MarkedYAMLError
-from .tokens import *
-from .events import *
-from .scanner import *
-
-class ParserError(MarkedYAMLError):
-    pass
-
-class Parser:
-    # Since writing a recursive-descendant parser is a straightforward task, we
-    # do not give many comments here.
-
-    DEFAULT_TAGS = {
-        '!':   '!',
-        '!!':  'tag:yaml.org,2002:',
-    }
-
-    def __init__(self):
-        self.current_event = None
-        self.yaml_version = None
-        self.tag_handles = {}
-        self.states = []
-        self.marks = []
-        self.state = self.parse_stream_start
-
-    def dispose(self):
-        # Reset the state attributes (to clear self-references)
-        self.states = []
-        self.state = None
-
-    def check_event(self, *choices):
-        # Check the type of the next event.
-        if self.current_event is None:
-            if self.state:
-                self.current_event = self.state()
-        if self.current_event is not None:
-            if not choices:
-                return True
-            for choice in choices:
-                if isinstance(self.current_event, choice):
-                    return True
-        return False
-
-    def peek_event(self):
-        # Get the next event.
-        if self.current_event is None:
-            if self.state:
-                self.current_event = self.state()
-        return self.current_event
-
-    def get_event(self):
-        # Get the next event and proceed further.
-        if self.current_event is None:
-            if self.state:
-                self.current_event = self.state()
-        value = self.current_event
-        self.current_event = None
-        return value
-
-    # stream    ::= STREAM-START implicit_document? explicit_document* STREAM-END
-    # implicit_document ::= block_node DOCUMENT-END*
-    # explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-
-    def parse_stream_start(self):
-
-        # Parse the stream start.
-        token = self.get_token()
-        event = StreamStartEvent(token.start_mark, token.end_mark,
-                encoding=token.encoding)
-
-        # Prepare the next state.
-        self.state = self.parse_implicit_document_start
-
-        return event
-
-    def parse_implicit_document_start(self):
-
-        # Parse an implicit document.
-        if not self.check_token(DirectiveToken, DocumentStartToken,
-                StreamEndToken):
-            self.tag_handles = self.DEFAULT_TAGS
-            token = self.peek_token()
-            start_mark = end_mark = token.start_mark
-            event = DocumentStartEvent(start_mark, end_mark,
-                    explicit=False)
-
-            # Prepare the next state.
-            self.states.append(self.parse_document_end)
-            self.state = self.parse_block_node
-
-            return event
-
-        else:
-            return self.parse_document_start()
-
-    def parse_document_start(self):
-
-        # Parse any extra document end indicators.
-        while self.check_token(DocumentEndToken):
-            self.get_token()
-
-        # Parse an explicit document.
-        if not self.check_token(StreamEndToken):
-            token = self.peek_token()
-            start_mark = token.start_mark
-            version, tags = self.process_directives()
-            if not self.check_token(DocumentStartToken):
-                raise ParserError(None, None,
-                        "expected '<document start>', but found %r"
-                        % self.peek_token().id,
-                        self.peek_token().start_mark)
-            token = self.get_token()
-            end_mark = token.end_mark
-            event = DocumentStartEvent(start_mark, end_mark,
-                    explicit=True, version=version, tags=tags)
-            self.states.append(self.parse_document_end)
-            self.state = self.parse_document_content
-        else:
-            # Parse the end of the stream.
-            token = self.get_token()
-            event = StreamEndEvent(token.start_mark, token.end_mark)
-            assert not self.states
-            assert not self.marks
-            self.state = None
-        return event
-
-    def parse_document_end(self):
-
-        # Parse the document end.
-        token = self.peek_token()
-        start_mark = end_mark = token.start_mark
-        explicit = False
-        if self.check_token(DocumentEndToken):
-            token = self.get_token()
-            end_mark = token.end_mark
-            explicit = True
-        event = DocumentEndEvent(start_mark, end_mark,
-                explicit=explicit)
-
-        # Prepare the next state.
-        self.state = self.parse_document_start
-
-        return event
-
-    def parse_document_content(self):
-        if self.check_token(DirectiveToken,
-                DocumentStartToken, DocumentEndToken, StreamEndToken):
-            event = self.process_empty_scalar(self.peek_token().start_mark)
-            self.state = self.states.pop()
-            return event
-        else:
-            return self.parse_block_node()
-
-    def process_directives(self):
-        self.yaml_version = None
-        self.tag_handles = {}
-        while self.check_token(DirectiveToken):
-            token = self.get_token()
-            if token.name == 'YAML':
-                if self.yaml_version is not None:
-                    raise ParserError(None, None,
-                            "found duplicate YAML directive", token.start_mark)
-                major, minor = token.value
-                if major != 1:
-                    raise ParserError(None, None,
-                            "found incompatible YAML document (version 1.* is required)",
-                            token.start_mark)
-                self.yaml_version = token.value
-            elif token.name == 'TAG':
-                handle, prefix = token.value
-                if handle in self.tag_handles:
-                    raise ParserError(None, None,
-                            "duplicate tag handle %r" % handle,
-                            token.start_mark)
-                self.tag_handles[handle] = prefix
-        if self.tag_handles:
-            value = self.yaml_version, self.tag_handles.copy()
-        else:
-            value = self.yaml_version, None
-        for key in self.DEFAULT_TAGS:
-            if key not in self.tag_handles:
-                self.tag_handles[key] = self.DEFAULT_TAGS[key]
-        return value
-
-    # block_node_or_indentless_sequence ::= ALIAS
-    #               | properties (block_content | indentless_block_sequence)?
-    #               | block_content
-    #               | indentless_block_sequence
-    # block_node    ::= ALIAS
-    #                   | properties block_content?
-    #                   | block_content
-    # flow_node     ::= ALIAS
-    #                   | properties flow_content?
-    #                   | flow_content
-    # properties    ::= TAG ANCHOR? | ANCHOR TAG?
-    # block_content     ::= block_collection | flow_collection | SCALAR
-    # flow_content      ::= flow_collection | SCALAR
-    # block_collection  ::= block_sequence | block_mapping
-    # flow_collection   ::= flow_sequence | flow_mapping
-
-    def parse_block_node(self):
-        return self.parse_node(block=True)
-
-    def parse_flow_node(self):
-        return self.parse_node()
-
-    def parse_block_node_or_indentless_sequence(self):
-        return self.parse_node(block=True, indentless_sequence=True)
-
-    def parse_node(self, block=False, indentless_sequence=False):
-        if self.check_token(AliasToken):
-            token = self.get_token()
-            event = AliasEvent(token.value, token.start_mark, token.end_mark)
-            self.state = self.states.pop()
-        else:
-            anchor = None
-            tag = None
-            start_mark = end_mark = tag_mark = None
-            if self.check_token(AnchorToken):
-                token = self.get_token()
-                start_mark = token.start_mark
-                end_mark = token.end_mark
-                anchor = token.value
-                if self.check_token(TagToken):
-                    token = self.get_token()
-                    tag_mark = token.start_mark
-                    end_mark = token.end_mark
-                    tag = token.value
-            elif self.check_token(TagToken):
-                token = self.get_token()
-                start_mark = tag_mark = token.start_mark
-                end_mark = token.end_mark
-                tag = token.value
-                if self.check_token(AnchorToken):
-                    token = self.get_token()
-                    end_mark = token.end_mark
-                    anchor = token.value
-            if tag is not None:
-                handle, suffix = tag
-                if handle is not None:
-                    if handle not in self.tag_handles:
-                        raise ParserError("while parsing a node", start_mark,
-                                "found undefined tag handle %r" % handle,
-                                tag_mark)
-                    tag = self.tag_handles[handle]+suffix
-                else:
-                    tag = suffix
-            #if tag == '!':
-            #    raise ParserError("while parsing a node", start_mark,
-            #            "found non-specific tag '!'", tag_mark,
-            #            "Please check 'http://pyyaml.org/wiki/YAMLNonSpecificTag' and share your opinion.")
-            if start_mark is None:
-                start_mark = end_mark = self.peek_token().start_mark
-            event = None
-            implicit = (tag is None or tag == '!')
-            if indentless_sequence and self.check_token(BlockEntryToken):
-                end_mark = self.peek_token().end_mark
-                event = SequenceStartEvent(anchor, tag, implicit,
-                        start_mark, end_mark)
-                self.state = self.parse_indentless_sequence_entry
-            else:
-                if self.check_token(ScalarToken):
-                    token = self.get_token()
-                    end_mark = token.end_mark
-                    if (token.plain and tag is None) or tag == '!':
-                        implicit = (True, False)
-                    elif tag is None:
-                        implicit = (False, True)
-                    else:
-                        implicit = (False, False)
-                    event = ScalarEvent(anchor, tag, implicit, token.value,
-                            start_mark, end_mark, style=token.style)
-                    self.state = self.states.pop()
-                elif self.check_token(FlowSequenceStartToken):
-                    end_mark = self.peek_token().end_mark
-                    event = SequenceStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=True)
-                    self.state = self.parse_flow_sequence_first_entry
-                elif self.check_token(FlowMappingStartToken):
-                    end_mark = self.peek_token().end_mark
-                    event = MappingStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=True)
-                    self.state = self.parse_flow_mapping_first_key
-                elif block and self.check_token(BlockSequenceStartToken):
-                    end_mark = self.peek_token().start_mark
-                    event = SequenceStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=False)
-                    self.state = self.parse_block_sequence_first_entry
-                elif block and self.check_token(BlockMappingStartToken):
-                    end_mark = self.peek_token().start_mark
-                    event = MappingStartEvent(anchor, tag, implicit,
-                            start_mark, end_mark, flow_style=False)
-                    self.state = self.parse_block_mapping_first_key
-                elif anchor is not None or tag is not None:
-                    # Empty scalars are allowed even if a tag or an anchor is
-                    # specified.
-                    event = ScalarEvent(anchor, tag, (implicit, False), '',
-                            start_mark, end_mark)
-                    self.state = self.states.pop()
-                else:
-                    if block:
-                        node = 'block'
-                    else:
-                        node = 'flow'
-                    token = self.peek_token()
-                    raise ParserError("while parsing a %s node" % node, start_mark,
-                            "expected the node content, but found %r" % token.id,
-                            token.start_mark)
-        return event
-
-    # block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
-
-    def parse_block_sequence_first_entry(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_block_sequence_entry()
-
-    def parse_block_sequence_entry(self):
-        if self.check_token(BlockEntryToken):
-            token = self.get_token()
-            if not self.check_token(BlockEntryToken, BlockEndToken):
-                self.states.append(self.parse_block_sequence_entry)
-                return self.parse_block_node()
-            else:
-                self.state = self.parse_block_sequence_entry
-                return self.process_empty_scalar(token.end_mark)
-        if not self.check_token(BlockEndToken):
-            token = self.peek_token()
-            raise ParserError("while parsing a block collection", self.marks[-1],
-                    "expected <block end>, but found %r" % token.id, token.start_mark)
-        token = self.get_token()
-        event = SequenceEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    # indentless_sequence ::= (BLOCK-ENTRY block_node?)+
-
-    def parse_indentless_sequence_entry(self):
-        if self.check_token(BlockEntryToken):
-            token = self.get_token()
-            if not self.check_token(BlockEntryToken,
-                    KeyToken, ValueToken, BlockEndToken):
-                self.states.append(self.parse_indentless_sequence_entry)
-                return self.parse_block_node()
-            else:
-                self.state = self.parse_indentless_sequence_entry
-                return self.process_empty_scalar(token.end_mark)
-        token = self.peek_token()
-        event = SequenceEndEvent(token.start_mark, token.start_mark)
-        self.state = self.states.pop()
-        return event
-
-    # block_mapping     ::= BLOCK-MAPPING_START
-    #                       ((KEY block_node_or_indentless_sequence?)?
-    #                       (VALUE block_node_or_indentless_sequence?)?)*
-    #                       BLOCK-END
-
-    def parse_block_mapping_first_key(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_block_mapping_key()
-
-    def parse_block_mapping_key(self):
-        if self.check_token(KeyToken):
-            token = self.get_token()
-            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
-                self.states.append(self.parse_block_mapping_value)
-                return self.parse_block_node_or_indentless_sequence()
-            else:
-                self.state = self.parse_block_mapping_value
-                return self.process_empty_scalar(token.end_mark)
-        if not self.check_token(BlockEndToken):
-            token = self.peek_token()
-            raise ParserError("while parsing a block mapping", self.marks[-1],
-                    "expected <block end>, but found %r" % token.id, token.start_mark)
-        token = self.get_token()
-        event = MappingEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    def parse_block_mapping_value(self):
-        if self.check_token(ValueToken):
-            token = self.get_token()
-            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
-                self.states.append(self.parse_block_mapping_key)
-                return self.parse_block_node_or_indentless_sequence()
-            else:
-                self.state = self.parse_block_mapping_key
-                return self.process_empty_scalar(token.end_mark)
-        else:
-            self.state = self.parse_block_mapping_key
-            token = self.peek_token()
-            return self.process_empty_scalar(token.start_mark)
-
-    # flow_sequence     ::= FLOW-SEQUENCE-START
-    #                       (flow_sequence_entry FLOW-ENTRY)*
-    #                       flow_sequence_entry?
-    #                       FLOW-SEQUENCE-END
-    # flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-    #
-    # Note that while production rules for both flow_sequence_entry and
-    # flow_mapping_entry are equal, their interpretations are different.
-    # For `flow_sequence_entry`, the part `KEY flow_node? (VALUE flow_node?)?`
-    # generate an inline mapping (set syntax).
-
-    def parse_flow_sequence_first_entry(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_flow_sequence_entry(first=True)
-
-    def parse_flow_sequence_entry(self, first=False):
-        if not self.check_token(FlowSequenceEndToken):
-            if not first:
-                if self.check_token(FlowEntryToken):
-                    self.get_token()
-                else:
-                    token = self.peek_token()
-                    raise ParserError("while parsing a flow sequence", self.marks[-1],
-                            "expected ',' or ']', but got %r" % token.id, token.start_mark)
-            
-            if self.check_token(KeyToken):
-                token = self.peek_token()
-                event = MappingStartEvent(None, None, True,
-                        token.start_mark, token.end_mark,
-                        flow_style=True)
-                self.state = self.parse_flow_sequence_entry_mapping_key
-                return event
-            elif not self.check_token(FlowSequenceEndToken):
-                self.states.append(self.parse_flow_sequence_entry)
-                return self.parse_flow_node()
-        token = self.get_token()
-        event = SequenceEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    def parse_flow_sequence_entry_mapping_key(self):
-        token = self.get_token()
-        if not self.check_token(ValueToken,
-                FlowEntryToken, FlowSequenceEndToken):
-            self.states.append(self.parse_flow_sequence_entry_mapping_value)
-            return self.parse_flow_node()
-        else:
-            self.state = self.parse_flow_sequence_entry_mapping_value
-            return self.process_empty_scalar(token.end_mark)
-
-    def parse_flow_sequence_entry_mapping_value(self):
-        if self.check_token(ValueToken):
-            token = self.get_token()
-            if not self.check_token(FlowEntryToken, FlowSequenceEndToken):
-                self.states.append(self.parse_flow_sequence_entry_mapping_end)
-                return self.parse_flow_node()
-            else:
-                self.state = self.parse_flow_sequence_entry_mapping_end
-                return self.process_empty_scalar(token.end_mark)
-        else:
-            self.state = self.parse_flow_sequence_entry_mapping_end
-            token = self.peek_token()
-            return self.process_empty_scalar(token.start_mark)
-
-    def parse_flow_sequence_entry_mapping_end(self):
-        self.state = self.parse_flow_sequence_entry
-        token = self.peek_token()
-        return MappingEndEvent(token.start_mark, token.start_mark)
-
-    # flow_mapping  ::= FLOW-MAPPING-START
-    #                   (flow_mapping_entry FLOW-ENTRY)*
-    #                   flow_mapping_entry?
-    #                   FLOW-MAPPING-END
-    # flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-
-    def parse_flow_mapping_first_key(self):
-        token = self.get_token()
-        self.marks.append(token.start_mark)
-        return self.parse_flow_mapping_key(first=True)
-
-    def parse_flow_mapping_key(self, first=False):
-        if not self.check_token(FlowMappingEndToken):
-            if not first:
-                if self.check_token(FlowEntryToken):
-                    self.get_token()
-                else:
-                    token = self.peek_token()
-                    raise ParserError("while parsing a flow mapping", self.marks[-1],
-                            "expected ',' or '}', but got %r" % token.id, token.start_mark)
-            if self.check_token(KeyToken):
-                token = self.get_token()
-                if not self.check_token(ValueToken,
-                        FlowEntryToken, FlowMappingEndToken):
-                    self.states.append(self.parse_flow_mapping_value)
-                    return self.parse_flow_node()
-                else:
-                    self.state = self.parse_flow_mapping_value
-                    return self.process_empty_scalar(token.end_mark)
-            elif not self.check_token(FlowMappingEndToken):
-                self.states.append(self.parse_flow_mapping_empty_value)
-                return self.parse_flow_node()
-        token = self.get_token()
-        event = MappingEndEvent(token.start_mark, token.end_mark)
-        self.state = self.states.pop()
-        self.marks.pop()
-        return event
-
-    def parse_flow_mapping_value(self):
-        if self.check_token(ValueToken):
-            token = self.get_token()
-            if not self.check_token(FlowEntryToken, FlowMappingEndToken):
-                self.states.append(self.parse_flow_mapping_key)
-                return self.parse_flow_node()
-            else:
-                self.state = self.parse_flow_mapping_key
-                return self.process_empty_scalar(token.end_mark)
-        else:
-            self.state = self.parse_flow_mapping_key
-            token = self.peek_token()
-            return self.process_empty_scalar(token.start_mark)
-
-    def parse_flow_mapping_empty_value(self):
-        self.state = self.parse_flow_mapping_key
-        return self.process_empty_scalar(self.peek_token().start_mark)
-
-    def process_empty_scalar(self, mark):
-        return ScalarEvent(None, None, (True, False), '', mark, mark)
-
diff --git a/python.d/python_modules/pyyaml3/reader.py b/python.d/python_modules/pyyaml3/reader.py
deleted file mode 100644
index f70e920f..00000000
--- a/python.d/python_modules/pyyaml3/reader.py
+++ /dev/null
@@ -1,192 +0,0 @@
-# This module contains abstractions for the input stream. You don't have to
-# looks further, there are no pretty code.
-#
-# We define two classes here.
-#
-#   Mark(source, line, column)
-# It's just a record and its only use is producing nice error messages.
-# Parser does not use it for any other purposes.
-#
-#   Reader(source, data)
-# Reader determines the encoding of `data` and converts it to unicode.
-# Reader provides the following methods and attributes:
-#   reader.peek(length=1) - return the next `length` characters
-#   reader.forward(length=1) - move the current position to `length` characters.
-#   reader.index - the number of the current character.
-#   reader.line, stream.column - the line and the column of the current character.
-
-__all__ = ['Reader', 'ReaderError']
-
-from .error import YAMLError, Mark
-
-import codecs, re
-
-class ReaderError(YAMLError):
-
-    def __init__(self, name, position, character, encoding, reason):
-        self.name = name
-        self.character = character
-        self.position = position
-        self.encoding = encoding
-        self.reason = reason
-
-    def __str__(self):
-        if isinstance(self.character, bytes):
-            return "'%s' codec can't decode byte #x%02x: %s\n"  \
-                    "  in \"%s\", position %d"    \
-                    % (self.encoding, ord(self.character), self.reason,
-                            self.name, self.position)
-        else:
-            return "unacceptable character #x%04x: %s\n"    \
-                    "  in \"%s\", position %d"    \
-                    % (self.character, self.reason,
-                            self.name, self.position)
-
-class Reader(object):
-    # Reader:
-    # - determines the data encoding and converts it to a unicode string,
-    # - checks if characters are in allowed range,
-    # - adds '\0' to the end.
-
-    # Reader accepts
-    #  - a `bytes` object,
-    #  - a `str` object,
-    #  - a file-like object with its `read` method returning `str`,
-    #  - a file-like object with its `read` method returning `unicode`.
-
-    # Yeah, it's ugly and slow.
-
-    def __init__(self, stream):
-        self.name = None
-        self.stream = None
-        self.stream_pointer = 0
-        self.eof = True
-        self.buffer = ''
-        self.pointer = 0
-        self.raw_buffer = None
-        self.raw_decode = None
-        self.encoding = None
-        self.index = 0
-        self.line = 0
-        self.column = 0
-        if isinstance(stream, str):
-            self.name = "<unicode string>"
-            self.check_printable(stream)
-            self.buffer = stream+'\0'
-        elif isinstance(stream, bytes):
-            self.name = "<byte string>"
-            self.raw_buffer = stream
-            self.determine_encoding()
-        else:
-            self.stream = stream
-            self.name = getattr(stream, 'name', "<file>")
-            self.eof = False
-            self.raw_buffer = None
-            self.determine_encoding()
-
-    def peek(self, index=0):
-        try:
-            return self.buffer[self.pointer+index]
-        except IndexError:
-            self.update(index+1)
-            return self.buffer[self.pointer+index]
-
-    def prefix(self, length=1):
-        if self.pointer+length >= len(self.buffer):
-            self.update(length)
-        return self.buffer[self.pointer:self.pointer+length]
-
-    def forward(self, length=1):
-        if self.pointer+length+1 >= len(self.buffer):
-            self.update(length+1)
-        while length:
-            ch = self.buffer[self.pointer]
-            self.pointer += 1
-            self.index += 1
-            if ch in '\n\x85\u2028\u2029'  \
-                    or (ch == '\r' and self.buffer[self.pointer] != '\n'):
-                self.line += 1
-                self.column = 0
-            elif ch != '\uFEFF':
-                self.column += 1
-            length -= 1
-
-    def get_mark(self):
-        if self.stream is None:
-            return Mark(self.name, self.index, self.line, self.column,
-                    self.buffer, self.pointer)
-        else:
-            return Mark(self.name, self.index, self.line, self.column,
-                    None, None)
-
-    def determine_encoding(self):
-        while not self.eof and (self.raw_buffer is None or len(self.raw_buffer) < 2):
-            self.update_raw()
-        if isinstance(self.raw_buffer, bytes):
-            if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
-                self.raw_decode = codecs.utf_16_le_decode
-                self.encoding = 'utf-16-le'
-            elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
-                self.raw_decode = codecs.utf_16_be_decode
-                self.encoding = 'utf-16-be'
-            else:
-                self.raw_decode = codecs.utf_8_decode
-                self.encoding = 'utf-8'
-        self.update(1)
-
-    NON_PRINTABLE = re.compile('[^\x09\x0A\x0D\x20-\x7E\x85\xA0-\uD7FF\uE000-\uFFFD]')
-    def check_printable(self, data):
-        match = self.NON_PRINTABLE.search(data)
-        if match:
-            character = match.group()
-            position = self.index+(len(self.buffer)-self.pointer)+match.start()
-            raise ReaderError(self.name, position, ord(character),
-                    'unicode', "special characters are not allowed")
-
-    def update(self, length):
-        if self.raw_buffer is None:
-            return
-        self.buffer = self.buffer[self.pointer:]
-        self.pointer = 0
-        while len(self.buffer) < length:
-            if not self.eof:
-                self.update_raw()
-            if self.raw_decode is not None:
-                try:
-                    data, converted = self.raw_decode(self.raw_buffer,
-                            'strict', self.eof)
-                except UnicodeDecodeError as exc:
-                    character = self.raw_buffer[exc.start]
-                    if self.stream is not None:
-                        position = self.stream_pointer-len(self.raw_buffer)+exc.start
-                    else:
-                        position = exc.start
-                    raise ReaderError(self.name, position, character,
-                            exc.encoding, exc.reason)
-            else:
-                data = self.raw_buffer
-                converted = len(data)
-            self.check_printable(data)
-            self.buffer += data
-            self.raw_buffer = self.raw_buffer[converted:]
-            if self.eof:
-                self.buffer += '\0'
-                self.raw_buffer = None
-                break
-
-    def update_raw(self, size=4096):
-        data = self.stream.read(size)
-        if self.raw_buffer is None:
-            self.raw_buffer = data
-        else:
-            self.raw_buffer += data
-        self.stream_pointer += len(data)
-        if not data:
-            self.eof = True
-
-#try:
-#    import psyco
-#    psyco.bind(Reader)
-#except ImportError:
-#    pass
-
diff --git a/python.d/python_modules/pyyaml3/representer.py b/python.d/python_modules/pyyaml3/representer.py
deleted file mode 100644
index 67cd6fd2..00000000
--- a/python.d/python_modules/pyyaml3/representer.py
+++ /dev/null
@@ -1,374 +0,0 @@
-
-__all__ = ['BaseRepresenter', 'SafeRepresenter', 'Representer',
-    'RepresenterError']
-
-from .error import *
-from .nodes import *
-
-import datetime, sys, copyreg, types, base64
-
-class RepresenterError(YAMLError):
-    pass
-
-class BaseRepresenter:
-
-    yaml_representers = {}
-    yaml_multi_representers = {}
-
-    def __init__(self, default_style=None, default_flow_style=None):
-        self.default_style = default_style
-        self.default_flow_style = default_flow_style
-        self.represented_objects = {}
-        self.object_keeper = []
-        self.alias_key = None
-
-    def represent(self, data):
-        node = self.represent_data(data)
-        self.serialize(node)
-        self.represented_objects = {}
-        self.object_keeper = []
-        self.alias_key = None
-
-    def represent_data(self, data):
-        if self.ignore_aliases(data):
-            self.alias_key = None
-        else:
-            self.alias_key = id(data)
-        if self.alias_key is not None:
-            if self.alias_key in self.represented_objects:
-                node = self.represented_objects[self.alias_key]
-                #if node is None:
-                #    raise RepresenterError("recursive objects are not allowed: %r" % data)
-                return node
-            #self.represented_objects[alias_key] = None
-            self.object_keeper.append(data)
-        data_types = type(data).__mro__
-        if data_types[0] in self.yaml_representers:
-            node = self.yaml_representers[data_types[0]](self, data)
-        else:
-            for data_type in data_types:
-                if data_type in self.yaml_multi_representers:
-                    node = self.yaml_multi_representers[data_type](self, data)
-                    break
-            else:
-                if None in self.yaml_multi_representers:
-                    node = self.yaml_multi_representers[None](self, data)
-                elif None in self.yaml_representers:
-                    node = self.yaml_representers[None](self, data)
-                else:
-                    node = ScalarNode(None, str(data))
-        #if alias_key is not None:
-        #    self.represented_objects[alias_key] = node
-        return node
-
-    @classmethod
-    def add_representer(cls, data_type, representer):
-        if not 'yaml_representers' in cls.__dict__:
-            cls.yaml_representers = cls.yaml_representers.copy()
-        cls.yaml_representers[data_type] = representer
-
-    @classmethod
-    def add_multi_representer(cls, data_type, representer):
-        if not 'yaml_multi_representers' in cls.__dict__:
-            cls.yaml_multi_representers = cls.yaml_multi_representers.copy()
-        cls.yaml_multi_representers[data_type] = representer
-
-    def represent_scalar(self, tag, value, style=None):
-        if style is None:
-            style = self.default_style
-        node = ScalarNode(tag, value, style=style)
-        if self.alias_key is not None:
-            self.represented_objects[self.alias_key] = node
-        return node
-
-    def represent_sequence(self, tag, sequence, flow_style=None):
-        value = []
-        node = SequenceNode(tag, value, flow_style=flow_style)
-        if self.alias_key is not None:
-            self.represented_objects[self.alias_key] = node
-        best_style = True
-        for item in sequence:
-            node_item = self.represent_data(item)
-            if not (isinstance(node_item, ScalarNode) and not node_item.style):
-                best_style = False
-            value.append(node_item)
-        if flow_style is None:
-            if self.default_flow_style is not None:
-                node.flow_style = self.default_flow_style
-            else:
-                node.flow_style = best_style
-        return node
-
-    def represent_mapping(self, tag, mapping, flow_style=None):
-        value = []
-        node = MappingNode(tag, value, flow_style=flow_style)
-        if self.alias_key is not None:
-            self.represented_objects[self.alias_key] = node
-        best_style = True
-        if hasattr(mapping, 'items'):
-            mapping = list(mapping.items())
-            try:
-                mapping = sorted(mapping)
-            except TypeError:
-                pass
-        for item_key, item_value in mapping:
-            node_key = self.represent_data(item_key)
-            node_value = self.represent_data(item_value)
-            if not (isinstance(node_key, ScalarNode) and not node_key.style):
-                best_style = False
-            if not (isinstance(node_value, ScalarNode) and not node_value.style):
-                best_style = False
-            value.append((node_key, node_value))
-        if flow_style is None:
-            if self.default_flow_style is not None:
-                node.flow_style = self.default_flow_style
-            else:
-                node.flow_style = best_style
-        return node
-
-    def ignore_aliases(self, data):
-        return False
-
-class SafeRepresenter(BaseRepresenter):
-
-    def ignore_aliases(self, data):
-        if data in [None, ()]:
-            return True
-        if isinstance(data, (str, bytes, bool, int, float)):
-            return True
-
-    def represent_none(self, data):
-        return self.represent_scalar('tag:yaml.org,2002:null', 'null')
-
-    def represent_str(self, data):
-        return self.represent_scalar('tag:yaml.org,2002:str', data)
-
-    def represent_binary(self, data):
-        if hasattr(base64, 'encodebytes'):
-            data = base64.encodebytes(data).decode('ascii')
-        else:
-            data = base64.encodestring(data).decode('ascii')
-        return self.represent_scalar('tag:yaml.org,2002:binary', data, style='|')
-
-    def represent_bool(self, data):
-        if data:
-            value = 'true'
-        else:
-            value = 'false'
-        return self.represent_scalar('tag:yaml.org,2002:bool', value)
-
-    def represent_int(self, data):
-        return self.represent_scalar('tag:yaml.org,2002:int', str(data))
-
-    inf_value = 1e300
-    while repr(inf_value) != repr(inf_value*inf_value):
-        inf_value *= inf_value
-
-    def represent_float(self, data):
-        if data != data or (data == 0.0 and data == 1.0):
-            value = '.nan'
-        elif data == self.inf_value:
-            value = '.inf'
-        elif data == -self.inf_value:
-            value = '-.inf'
-        else:
-            value = repr(data).lower()
-            # Note that in some cases `repr(data)` represents a float number
-            # without the decimal parts.  For instance:
-            #   >>> repr(1e17)
-            #   '1e17'
-            # Unfortunately, this is not a valid float representation according
-            # to the definition of the `!!float` tag.  We fix this by adding
-            # '.0' before the 'e' symbol.
-            if '.' not in value and 'e' in value:
-                value = value.replace('e', '.0e', 1)
-        return self.represent_scalar('tag:yaml.org,2002:float', value)
-
-    def represent_list(self, data):
-        #pairs = (len(data) > 0 and isinstance(data, list))
-        #if pairs:
-        #    for item in data:
-        #        if not isinstance(item, tuple) or len(item) != 2:
-        #            pairs = False
-        #            break
-        #if not pairs:
-            return self.represent_sequence('tag:yaml.org,2002:seq', data)
-        #value = []
-        #for item_key, item_value in data:
-        #    value.append(self.represent_mapping(u'tag:yaml.org,2002:map',
-        #        [(item_key, item_value)]))
-        #return SequenceNode(u'tag:yaml.org,2002:pairs', value)
-
-    def represent_dict(self, data):
-        return self.represent_mapping('tag:yaml.org,2002:map', data)
-
-    def represent_set(self, data):
-        value = {}
-        for key in data:
-            value[key] = None
-        return self.represent_mapping('tag:yaml.org,2002:set', value)
-
-    def represent_date(self, data):
-        value = data.isoformat()
-        return self.represent_scalar('tag:yaml.org,2002:timestamp', value)
-
-    def represent_datetime(self, data):
-        value = data.isoformat(' ')
-        return self.represent_scalar('tag:yaml.org,2002:timestamp', value)
-
-    def represent_yaml_object(self, tag, data, cls, flow_style=None):
-        if hasattr(data, '__getstate__'):
-            state = data.__getstate__()
-        else:
-            state = data.__dict__.copy()
-        return self.represent_mapping(tag, state, flow_style=flow_style)
-
-    def represent_undefined(self, data):
-        raise RepresenterError("cannot represent an object: %s" % data)
-
-SafeRepresenter.add_representer(type(None),
-        SafeRepresenter.represent_none)
-
-SafeRepresenter.add_representer(str,
-        SafeRepresenter.represent_str)
-
-SafeRepresenter.add_representer(bytes,
-        SafeRepresenter.represent_binary)
-
-SafeRepresenter.add_representer(bool,
-        SafeRepresenter.represent_bool)
-
-SafeRepresenter.add_representer(int,
-        SafeRepresenter.represent_int)
-
-SafeRepresenter.add_representer(float,
-        SafeRepresenter.represent_float)
-
-SafeRepresenter.add_representer(list,
-        SafeRepresenter.represent_list)
-
-SafeRepresenter.add_representer(tuple,
-        SafeRepresenter.represent_list)
-
-SafeRepresenter.add_representer(dict,
-        SafeRepresenter.represent_dict)
-
-SafeRepresenter.add_representer(set,
-        SafeRepresenter.represent_set)
-
-SafeRepresenter.add_representer(datetime.date,
-        SafeRepresenter.represent_date)
-
-SafeRepresenter.add_representer(datetime.datetime,
-        SafeRepresenter.represent_datetime)
-
-SafeRepresenter.add_representer(None,
-        SafeRepresenter.represent_undefined)
-
-class Representer(SafeRepresenter):
-
-    def represent_complex(self, data):
-        if data.imag == 0.0:
-            data = '%r' % data.real
-        elif data.real == 0.0:
-            data = '%rj' % data.imag
-        elif data.imag > 0:
-            data = '%r+%rj' % (data.real, data.imag)
-        else:
-            data = '%r%rj' % (data.real, data.imag)
-        return self.represent_scalar('tag:yaml.org,2002:python/complex', data)
-
-    def represent_tuple(self, data):
-        return self.represent_sequence('tag:yaml.org,2002:python/tuple', data)
-
-    def represent_name(self, data):
-        name = '%s.%s' % (data.__module__, data.__name__)
-        return self.represent_scalar('tag:yaml.org,2002:python/name:'+name, '')
-
-    def represent_module(self, data):
-        return self.represent_scalar(
-                'tag:yaml.org,2002:python/module:'+data.__name__, '')
-
-    def represent_object(self, data):
-        # We use __reduce__ API to save the data. data.__reduce__ returns
-        # a tuple of length 2-5:
-        #   (function, args, state, listitems, dictitems)
-
-        # For reconstructing, we calls function(*args), then set its state,
-        # listitems, and dictitems if they are not None.
-
-        # A special case is when function.__name__ == '__newobj__'. In this
-        # case we create the object with args[0].__new__(*args).
-
-        # Another special case is when __reduce__ returns a string - we don't
-        # support it.
-
-        # We produce a !!python/object, !!python/object/new or
-        # !!python/object/apply node.
-
-        cls = type(data)
-        if cls in copyreg.dispatch_table:
-            reduce = copyreg.dispatch_table[cls](data)
-        elif hasattr(data, '__reduce_ex__'):
-            reduce = data.__reduce_ex__(2)
-        elif hasattr(data, '__reduce__'):
-            reduce = data.__reduce__()
-        else:
-            raise RepresenterError("cannot represent object: %r" % data)
-        reduce = (list(reduce)+[None]*5)[:5]
-        function, args, state, listitems, dictitems = reduce
-        args = list(args)
-        if state is None:
-            state = {}
-        if listitems is not None:
-            listitems = list(listitems)
-        if dictitems is not None:
-            dictitems = dict(dictitems)
-        if function.__name__ == '__newobj__':
-            function = args[0]
-            args = args[1:]
-            tag = 'tag:yaml.org,2002:python/object/new:'
-            newobj = True
-        else:
-            tag = 'tag:yaml.org,2002:python/object/apply:'
-            newobj = False
-        function_name = '%s.%s' % (function.__module__, function.__name__)
-        if not args and not listitems and not dictitems \
-                and isinstance(state, dict) and newobj:
-            return self.represent_mapping(
-                    'tag:yaml.org,2002:python/object:'+function_name, state)
-        if not listitems and not dictitems  \
-                and isinstance(state, dict) and not state:
-            return self.represent_sequence(tag+function_name, args)
-        value = {}
-        if args:
-            value['args'] = args
-        if state or not isinstance(state, dict):
-            value['state'] = state
-        if listitems:
-            value['listitems'] = listitems
-        if dictitems:
-            value['dictitems'] = dictitems
-        return self.represent_mapping(tag+function_name, value)
-
-Representer.add_representer(complex,
-        Representer.represent_complex)
-
-Representer.add_representer(tuple,
-        Representer.represent_tuple)
-
-Representer.add_representer(type,
-        Representer.represent_name)
-
-Representer.add_representer(types.FunctionType,
-        Representer.represent_name)
-
-Representer.add_representer(types.BuiltinFunctionType,
-        Representer.represent_name)
-
-Representer.add_representer(types.ModuleType,
-        Representer.represent_module)
-
-Representer.add_multi_representer(object,
-        Representer.represent_object)
-
diff --git a/python.d/python_modules/pyyaml3/resolver.py b/python.d/python_modules/pyyaml3/resolver.py
deleted file mode 100644
index 0eece258..00000000
--- a/python.d/python_modules/pyyaml3/resolver.py
+++ /dev/null
@@ -1,224 +0,0 @@
-
-__all__ = ['BaseResolver', 'Resolver']
-
-from .error import *
-from .nodes import *
-
-import re
-
-class ResolverError(YAMLError):
-    pass
-
-class BaseResolver:
-
-    DEFAULT_SCALAR_TAG = 'tag:yaml.org,2002:str'
-    DEFAULT_SEQUENCE_TAG = 'tag:yaml.org,2002:seq'
-    DEFAULT_MAPPING_TAG = 'tag:yaml.org,2002:map'
-
-    yaml_implicit_resolvers = {}
-    yaml_path_resolvers = {}
-
-    def __init__(self):
-        self.resolver_exact_paths = []
-        self.resolver_prefix_paths = []
-
-    @classmethod
-    def add_implicit_resolver(cls, tag, regexp, first):
-        if not 'yaml_implicit_resolvers' in cls.__dict__:
-            cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy()
-        if first is None:
-            first = [None]
-        for ch in first:
-            cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
-
-    @classmethod
-    def add_path_resolver(cls, tag, path, kind=None):
-        # Note: `add_path_resolver` is experimental.  The API could be changed.
-        # `new_path` is a pattern that is matched against the path from the
-        # root to the node that is being considered.  `node_path` elements are
-        # tuples `(node_check, index_check)`.  `node_check` is a node class:
-        # `ScalarNode`, `SequenceNode`, `MappingNode` or `None`.  `None`
-        # matches any kind of a node.  `index_check` could be `None`, a boolean
-        # value, a string value, or a number.  `None` and `False` match against
-        # any _value_ of sequence and mapping nodes.  `True` matches against
-        # any _key_ of a mapping node.  A string `index_check` matches against
-        # a mapping value that corresponds to a scalar key which content is
-        # equal to the `index_check` value.  An integer `index_check` matches
-        # against a sequence value with the index equal to `index_check`.
-        if not 'yaml_path_resolvers' in cls.__dict__:
-            cls.yaml_path_resolvers = cls.yaml_path_resolvers.copy()
-        new_path = []
-        for element in path:
-            if isinstance(element, (list, tuple)):
-                if len(element) == 2:
-                    node_check, index_check = element
-                elif len(element) == 1:
-                    node_check = element[0]
-                    index_check = True
-                else:
-                    raise ResolverError("Invalid path element: %s" % element)
-            else:
-                node_check = None
-                index_check = element
-            if node_check is str:
-                node_check = ScalarNode
-            elif node_check is list:
-                node_check = SequenceNode
-            elif node_check is dict:
-                node_check = MappingNode
-            elif node_check not in [ScalarNode, SequenceNode, MappingNode]  \
-                    and not isinstance(node_check, str) \
-                    and node_check is not None:
-                raise ResolverError("Invalid node checker: %s" % node_check)
-            if not isinstance(index_check, (str, int))  \
-                    and index_check is not None:
-                raise ResolverError("Invalid index checker: %s" % index_check)
-            new_path.append((node_check, index_check))
-        if kind is str:
-            kind = ScalarNode
-        elif kind is list:
-            kind = SequenceNode
-        elif kind is dict:
-            kind = MappingNode
-        elif kind not in [ScalarNode, SequenceNode, MappingNode]    \
-                and kind is not None:
-            raise ResolverError("Invalid node kind: %s" % kind)
-        cls.yaml_path_resolvers[tuple(new_path), kind] = tag
-
-    def descend_resolver(self, current_node, current_index):
-        if not self.yaml_path_resolvers:
-            return
-        exact_paths = {}
-        prefix_paths = []
-        if current_node:
-            depth = len(self.resolver_prefix_paths)
-            for path, kind in self.resolver_prefix_paths[-1]:
-                if self.check_resolver_prefix(depth, path, kind,
-                        current_node, current_index):
-                    if len(path) > depth:
-                        prefix_paths.append((path, kind))
-                    else:
-                        exact_paths[kind] = self.yaml_path_resolvers[path, kind]
-        else:
-            for path, kind in self.yaml_path_resolvers:
-                if not path:
-                    exact_paths[kind] = self.yaml_path_resolvers[path, kind]
-                else:
-                    prefix_paths.append((path, kind))
-        self.resolver_exact_paths.append(exact_paths)
-        self.resolver_prefix_paths.append(prefix_paths)
-
-    def ascend_resolver(self):
-        if not self.yaml_path_resolvers:
-            return
-        self.resolver_exact_paths.pop()
-        self.resolver_prefix_paths.pop()
-
-    def check_resolver_prefix(self, depth, path, kind,
-            current_node, current_index):
-        node_check, index_check = path[depth-1]
-        if isinstance(node_check, str):
-            if current_node.tag != node_check:
-                return
-        elif node_check is not None:
-            if not isinstance(current_node, node_check):
-                return
-        if index_check is True and current_index is not None:
-            return
-        if (index_check is False or index_check is None)    \
-                and current_index is None:
-            return
-        if isinstance(index_check, str):
-            if not (isinstance(current_index, ScalarNode)
-                    and index_check == current_index.value):
-                return
-        elif isinstance(index_check, int) and not isinstance(index_check, bool):
-            if index_check != current_index:
-                return
-        return True
-
-    def resolve(self, kind, value, implicit):
-        if kind is ScalarNode and implicit[0]:
-            if value == '':
-                resolvers = self.yaml_implicit_resolvers.get('', [])
-            else:
-                resolvers = self.yaml_implicit_resolvers.get(value[0], [])
-            resolvers += self.yaml_implicit_resolvers.get(None, [])
-            for tag, regexp in resolvers:
-                if regexp.match(value):
-                    return tag
-            implicit = implicit[1]
-        if self.yaml_path_resolvers:
-            exact_paths = self.resolver_exact_paths[-1]
-            if kind in exact_paths:
-                return exact_paths[kind]
-            if None in exact_paths:
-                return exact_paths[None]
-        if kind is ScalarNode:
-            return self.DEFAULT_SCALAR_TAG
-        elif kind is SequenceNode:
-            return self.DEFAULT_SEQUENCE_TAG
-        elif kind is MappingNode:
-            return self.DEFAULT_MAPPING_TAG
-
-class Resolver(BaseResolver):
-    pass
-
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:bool',
-        re.compile(r'''^(?:yes|Yes|YES|no|No|NO
-                    |true|True|TRUE|false|False|FALSE
-                    |on|On|ON|off|Off|OFF)$''', re.X),
-        list('yYnNtTfFoO'))
-
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:float',
-        re.compile(r'''^(?:[-+]?(?:[0-9][0-9_]*)\.[0-9_]*(?:[eE][-+][0-9]+)?
-                    |\.[0-9_]+(?:[eE][-+][0-9]+)?
-                    |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\.[0-9_]*
-                    |[-+]?\.(?:inf|Inf|INF)
-                    |\.(?:nan|NaN|NAN))$''', re.X),
-        list('-+0123456789.'))
-
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:int',
-        re.compile(r'''^(?:[-+]?0b[0-1_]+
-                    |[-+]?0[0-7_]+
-                    |[-+]?(?:0|[1-9][0-9_]*)
-                    |[-+]?0x[0-9a-fA-F_]+
-                    |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
-        list('-+0123456789'))
-
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:merge',
-        re.compile(r'^(?:<<)$'),
-        ['<'])
-
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:null',
-        re.compile(r'''^(?: ~
-                    |null|Null|NULL
-                    | )$''', re.X),
-        ['~', 'n', 'N', ''])
-
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:timestamp',
-        re.compile(r'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
-                    |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
-                     (?:[Tt]|[ \t]+)[0-9][0-9]?
-                     :[0-9][0-9] :[0-9][0-9] (?:\.[0-9]*)?
-                     (?:[ \t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
-        list('0123456789'))
-
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:value',
-        re.compile(r'^(?:=)$'),
-        ['='])
-
-# The following resolver is only for documentation purposes. It cannot work
-# because plain scalars cannot start with '!', '&', or '*'.
-Resolver.add_implicit_resolver(
-        'tag:yaml.org,2002:yaml',
-        re.compile(r'^(?:!|&|\*)$'),
-        list('!&*'))
-
diff --git a/python.d/python_modules/pyyaml3/scanner.py b/python.d/python_modules/pyyaml3/scanner.py
deleted file mode 100644
index 494d975b..00000000
--- a/python.d/python_modules/pyyaml3/scanner.py
+++ /dev/null
@@ -1,1448 +0,0 @@
-
-# Scanner produces tokens of the following types:
-# STREAM-START
-# STREAM-END
-# DIRECTIVE(name, value)
-# DOCUMENT-START
-# DOCUMENT-END
-# BLOCK-SEQUENCE-START
-# BLOCK-MAPPING-START
-# BLOCK-END
-# FLOW-SEQUENCE-START
-# FLOW-MAPPING-START
-# FLOW-SEQUENCE-END
-# FLOW-MAPPING-END
-# BLOCK-ENTRY
-# FLOW-ENTRY
-# KEY
-# VALUE
-# ALIAS(value)
-# ANCHOR(value)
-# TAG(value)
-# SCALAR(value, plain, style)
-#
-# Read comments in the Scanner code for more details.
-#
-
-__all__ = ['Scanner', 'ScannerError']
-
-from .error import MarkedYAMLError
-from .tokens import *
-
-class ScannerError(MarkedYAMLError):
-    pass
-
-class SimpleKey:
-    # See below simple keys treatment.
-
-    def __init__(self, token_number, required, index, line, column, mark):
-        self.token_number = token_number
-        self.required = required
-        self.index = index
-        self.line = line
-        self.column = column
-        self.mark = mark
-
-class Scanner:
-
-    def __init__(self):
-        """Initialize the scanner."""
-        # It is assumed that Scanner and Reader will have a common descendant.
-        # Reader do the dirty work of checking for BOM and converting the
-        # input data to Unicode. It also adds NUL to the end.
-        #
-        # Reader supports the following methods
-        #   self.peek(i=0)       # peek the next i-th character
-        #   self.prefix(l=1)     # peek the next l characters
-        #   self.forward(l=1)    # read the next l characters and move the pointer.
-
-        # Had we reached the end of the stream?
-        self.done = False
-
-        # The number of unclosed '{' and '['. `flow_level == 0` means block
-        # context.
-        self.flow_level = 0
-
-        # List of processed tokens that are not yet emitted.
-        self.tokens = []
-
-        # Add the STREAM-START token.
-        self.fetch_stream_start()
-
-        # Number of tokens that were emitted through the `get_token` method.
-        self.tokens_taken = 0
-
-        # The current indentation level.
-        self.indent = -1
-
-        # Past indentation levels.
-        self.indents = []
-
-        # Variables related to simple keys treatment.
-
-        # A simple key is a key that is not denoted by the '?' indicator.
-        # Example of simple keys:
-        #   ---
-        #   block simple key: value
-        #   ? not a simple key:
-        #   : { flow simple key: value }
-        # We emit the KEY token before all keys, so when we find a potential
-        # simple key, we try to locate the corresponding ':' indicator.
-        # Simple keys should be limited to a single line and 1024 characters.
-
-        # Can a simple key start at the current position? A simple key may
-        # start:
-        # - at the beginning of the line, not counting indentation spaces
-        #       (in block context),
-        # - after '{', '[', ',' (in the flow context),
-        # - after '?', ':', '-' (in the block context).
-        # In the block context, this flag also signifies if a block collection
-        # may start at the current position.
-        self.allow_simple_key = True
-
-        # Keep track of possible simple keys. This is a dictionary. The key
-        # is `flow_level`; there can be no more that one possible simple key
-        # for each level. The value is a SimpleKey record:
-        #   (token_number, required, index, line, column, mark)
-        # A simple key may start with ALIAS, ANCHOR, TAG, SCALAR(flow),
-        # '[', or '{' tokens.
-        self.possible_simple_keys = {}
-
-    # Public methods.
-
-    def check_token(self, *choices):
-        # Check if the next token is one of the given types.
-        while self.need_more_tokens():
-            self.fetch_more_tokens()
-        if self.tokens:
-            if not choices:
-                return True
-            for choice in choices:
-                if isinstance(self.tokens[0], choice):
-                    return True
-        return False
-
-    def peek_token(self):
-        # Return the next token, but do not delete if from the queue.
-        while self.need_more_tokens():
-            self.fetch_more_tokens()
-        if self.tokens:
-            return self.tokens[0]
-
-    def get_token(self):
-        # Return the next token.
-        while self.need_more_tokens():
-            self.fetch_more_tokens()
-        if self.tokens:
-            self.tokens_taken += 1
-            return self.tokens.pop(0)
-
-    # Private methods.
-
-    def need_more_tokens(self):
-        if self.done:
-            return False
-        if not self.tokens:
-            return True
-        # The current token may be a potential simple key, so we
-        # need to look further.
-        self.stale_possible_simple_keys()
-        if self.next_possible_simple_key() == self.tokens_taken:
-            return True
-
-    def fetch_more_tokens(self):
-
-        # Eat whitespaces and comments until we reach the next token.
-        self.scan_to_next_token()
-
-        # Remove obsolete possible simple keys.
-        self.stale_possible_simple_keys()
-
-        # Compare the current indentation and column. It may add some tokens
-        # and decrease the current indentation level.
-        self.unwind_indent(self.column)
-
-        # Peek the next character.
-        ch = self.peek()
-
-        # Is it the end of stream?
-        if ch == '\0':
-            return self.fetch_stream_end()
-
-        # Is it a directive?
-        if ch == '%' and self.check_directive():
-            return self.fetch_directive()
-
-        # Is it the document start?
-        if ch == '-' and self.check_document_start():
-            return self.fetch_document_start()
-
-        # Is it the document end?
-        if ch == '.' and self.check_document_end():
-            return self.fetch_document_end()
-
-        # TODO: support for BOM within a stream.
-        #if ch == '\uFEFF':
-        #    return self.fetch_bom()    <-- issue BOMToken
-
-        # Note: the order of the following checks is NOT significant.
-
-        # Is it the flow sequence start indicator?
-        if ch == '[':
-            return self.fetch_flow_sequence_start()
-
-        # Is it the flow mapping start indicator?
-        if ch == '{':
-            return self.fetch_flow_mapping_start()
-
-        # Is it the flow sequence end indicator?
-        if ch == ']':
-            return self.fetch_flow_sequence_end()
-
-        # Is it the flow mapping end indicator?
-        if ch == '}':
-            return self.fetch_flow_mapping_end()
-
-        # Is it the flow entry indicator?
-        if ch == ',':
-            return self.fetch_flow_entry()
-
-        # Is it the block entry indicator?
-        if ch == '-' and self.check_block_entry():
-            return self.fetch_block_entry()
-
-        # Is it the key indicator?
-        if ch == '?' and self.check_key():
-            return self.fetch_key()
-
-        # Is it the value indicator?
-        if ch == ':' and self.check_value():
-            return self.fetch_value()
-
-        # Is it an alias?
-        if ch == '*':
-            return self.fetch_alias()
-
-        # Is it an anchor?
-        if ch == '&':
-            return self.fetch_anchor()
-
-        # Is it a tag?
-        if ch == '!':
-            return self.fetch_tag()
-
-        # Is it a literal scalar?
-        if ch == '|' and not self.flow_level:
-            return self.fetch_literal()
-
-        # Is it a folded scalar?
-        if ch == '>' and not self.flow_level:
-            return self.fetch_folded()
-
-        # Is it a single quoted scalar?
-        if ch == '\'':
-            return self.fetch_single()
-
-        # Is it a double quoted scalar?
-        if ch == '\"':
-            return self.fetch_double()
-
-        # It must be a plain scalar then.
-        if self.check_plain():
-            return self.fetch_plain()
-
-        # No? It's an error. Let's produce a nice error message.
-        raise ScannerError("while scanning for the next token", None,
-                "found character %r that cannot start any token" % ch,
-                self.get_mark())
-
-    # Simple keys treatment.
-
-    def next_possible_simple_key(self):
-        # Return the number of the nearest possible simple key. Actually we
-        # don't need to loop through the whole dictionary. We may replace it
-        # with the following code:
-        #   if not self.possible_simple_keys:
-        #       return None
-        #   return self.possible_simple_keys[
-        #           min(self.possible_simple_keys.keys())].token_number
-        min_token_number = None
-        for level in self.possible_simple_keys:
-            key = self.possible_simple_keys[level]
-            if min_token_number is None or key.token_number < min_token_number:
-                min_token_number = key.token_number
-        return min_token_number
-
-    def stale_possible_simple_keys(self):
-        # Remove entries that are no longer possible simple keys. According to
-        # the YAML specification, simple keys
-        # - should be limited to a single line,
-        # - should be no longer than 1024 characters.
-        # Disabling this procedure will allow simple keys of any length and
-        # height (may cause problems if indentation is broken though).
-        for level in list(self.possible_simple_keys):
-            key = self.possible_simple_keys[level]
-            if key.line != self.line  \
-                    or self.index-key.index > 1024:
-                if key.required:
-                    raise ScannerError("while scanning a simple key", key.mark,
-                            "could not found expected ':'", self.get_mark())
-                del self.possible_simple_keys[level]
-
-    def save_possible_simple_key(self):
-        # The next token may start a simple key. We check if it's possible
-        # and save its position. This function is called for
-        #   ALIAS, ANCHOR, TAG, SCALAR(flow), '[', and '{'.
-
-        # Check if a simple key is required at the current position.
-        required = not self.flow_level and self.indent == self.column
-
-        # A simple key is required only if it is the first token in the current
-        # line. Therefore it is always allowed.
-        assert self.allow_simple_key or not required
-
-        # The next token might be a simple key. Let's save it's number and
-        # position.
-        if self.allow_simple_key:
-            self.remove_possible_simple_key()
-            token_number = self.tokens_taken+len(self.tokens)
-            key = SimpleKey(token_number, required,
-                    self.index, self.line, self.column, self.get_mark())
-            self.possible_simple_keys[self.flow_level] = key
-
-    def remove_possible_simple_key(self):
-        # Remove the saved possible key position at the current flow level.
-        if self.flow_level in self.possible_simple_keys:
-            key = self.possible_simple_keys[self.flow_level]
-            
-            if key.required:
-                raise ScannerError("while scanning a simple key", key.mark,
-                        "could not found expected ':'", self.get_mark())
-
-            del self.possible_simple_keys[self.flow_level]
-
-    # Indentation functions.
-
-    def unwind_indent(self, column):
-
-        ## In flow context, tokens should respect indentation.
-        ## Actually the condition should be `self.indent >= column` according to
-        ## the spec. But this condition will prohibit intuitively correct
-        ## constructions such as
-        ## key : {
-        ## }
-        #if self.flow_level and self.indent > column:
-        #    raise ScannerError(None, None,
-        #            "invalid intendation or unclosed '[' or '{'",
-        #            self.get_mark())
-
-        # In the flow context, indentation is ignored. We make the scanner less
-        # restrictive then specification requires.
-        if self.flow_level:
-            return
-
-        # In block context, we may need to issue the BLOCK-END tokens.
-        while self.indent > column:
-            mark = self.get_mark()
-            self.indent = self.indents.pop()
-            self.tokens.append(BlockEndToken(mark, mark))
-
-    def add_indent(self, column):
-        # Check if we need to increase indentation.
-        if self.indent < column:
-            self.indents.append(self.indent)
-            self.indent = column
-            return True
-        return False
-
-    # Fetchers.
-
-    def fetch_stream_start(self):
-        # We always add STREAM-START as the first token and STREAM-END as the
-        # last token.
-
-        # Read the token.
-        mark = self.get_mark()
-        
-        # Add STREAM-START.
-        self.tokens.append(StreamStartToken(mark, mark,
-            encoding=self.encoding))
-        
-
-    def fetch_stream_end(self):
-
-        # Set the current intendation to -1.
-        self.unwind_indent(-1)
-
-        # Reset simple keys.
-        self.remove_possible_simple_key()
-        self.allow_simple_key = False
-        self.possible_simple_keys = {}
-
-        # Read the token.
-        mark = self.get_mark()
-        
-        # Add STREAM-END.
-        self.tokens.append(StreamEndToken(mark, mark))
-
-        # The steam is finished.
-        self.done = True
-
-    def fetch_directive(self):
-        
-        # Set the current intendation to -1.
-        self.unwind_indent(-1)
-
-        # Reset simple keys.
-        self.remove_possible_simple_key()
-        self.allow_simple_key = False
-
-        # Scan and add DIRECTIVE.
-        self.tokens.append(self.scan_directive())
-
-    def fetch_document_start(self):
-        self.fetch_document_indicator(DocumentStartToken)
-
-    def fetch_document_end(self):
-        self.fetch_document_indicator(DocumentEndToken)
-
-    def fetch_document_indicator(self, TokenClass):
-
-        # Set the current intendation to -1.
-        self.unwind_indent(-1)
-
-        # Reset simple keys. Note that there could not be a block collection
-        # after '---'.
-        self.remove_possible_simple_key()
-        self.allow_simple_key = False
-
-        # Add DOCUMENT-START or DOCUMENT-END.
-        start_mark = self.get_mark()
-        self.forward(3)
-        end_mark = self.get_mark()
-        self.tokens.append(TokenClass(start_mark, end_mark))
-
-    def fetch_flow_sequence_start(self):
-        self.fetch_flow_collection_start(FlowSequenceStartToken)
-
-    def fetch_flow_mapping_start(self):
-        self.fetch_flow_collection_start(FlowMappingStartToken)
-
-    def fetch_flow_collection_start(self, TokenClass):
-
-        # '[' and '{' may start a simple key.
-        self.save_possible_simple_key()
-
-        # Increase the flow level.
-        self.flow_level += 1
-
-        # Simple keys are allowed after '[' and '{'.
-        self.allow_simple_key = True
-
-        # Add FLOW-SEQUENCE-START or FLOW-MAPPING-START.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(TokenClass(start_mark, end_mark))
-
-    def fetch_flow_sequence_end(self):
-        self.fetch_flow_collection_end(FlowSequenceEndToken)
-
-    def fetch_flow_mapping_end(self):
-        self.fetch_flow_collection_end(FlowMappingEndToken)
-
-    def fetch_flow_collection_end(self, TokenClass):
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Decrease the flow level.
-        self.flow_level -= 1
-
-        # No simple keys after ']' or '}'.
-        self.allow_simple_key = False
-
-        # Add FLOW-SEQUENCE-END or FLOW-MAPPING-END.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(TokenClass(start_mark, end_mark))
-
-    def fetch_flow_entry(self):
-
-        # Simple keys are allowed after ','.
-        self.allow_simple_key = True
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Add FLOW-ENTRY.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(FlowEntryToken(start_mark, end_mark))
-
-    def fetch_block_entry(self):
-
-        # Block context needs additional checks.
-        if not self.flow_level:
-
-            # Are we allowed to start a new entry?
-            if not self.allow_simple_key:
-                raise ScannerError(None, None,
-                        "sequence entries are not allowed here",
-                        self.get_mark())
-
-            # We may need to add BLOCK-SEQUENCE-START.
-            if self.add_indent(self.column):
-                mark = self.get_mark()
-                self.tokens.append(BlockSequenceStartToken(mark, mark))
-
-        # It's an error for the block entry to occur in the flow context,
-        # but we let the parser detect this.
-        else:
-            pass
-
-        # Simple keys are allowed after '-'.
-        self.allow_simple_key = True
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Add BLOCK-ENTRY.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(BlockEntryToken(start_mark, end_mark))
-
-    def fetch_key(self):
-        
-        # Block context needs additional checks.
-        if not self.flow_level:
-
-            # Are we allowed to start a key (not nessesary a simple)?
-            if not self.allow_simple_key:
-                raise ScannerError(None, None,
-                        "mapping keys are not allowed here",
-                        self.get_mark())
-
-            # We may need to add BLOCK-MAPPING-START.
-            if self.add_indent(self.column):
-                mark = self.get_mark()
-                self.tokens.append(BlockMappingStartToken(mark, mark))
-
-        # Simple keys are allowed after '?' in the block context.
-        self.allow_simple_key = not self.flow_level
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Add KEY.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(KeyToken(start_mark, end_mark))
-
-    def fetch_value(self):
-
-        # Do we determine a simple key?
-        if self.flow_level in self.possible_simple_keys:
-
-            # Add KEY.
-            key = self.possible_simple_keys[self.flow_level]
-            del self.possible_simple_keys[self.flow_level]
-            self.tokens.insert(key.token_number-self.tokens_taken,
-                    KeyToken(key.mark, key.mark))
-
-            # If this key starts a new block mapping, we need to add
-            # BLOCK-MAPPING-START.
-            if not self.flow_level:
-                if self.add_indent(key.column):
-                    self.tokens.insert(key.token_number-self.tokens_taken,
-                            BlockMappingStartToken(key.mark, key.mark))
-
-            # There cannot be two simple keys one after another.
-            self.allow_simple_key = False
-
-        # It must be a part of a complex key.
-        else:
-            
-            # Block context needs additional checks.
-            # (Do we really need them? They will be catched by the parser
-            # anyway.)
-            if not self.flow_level:
-
-                # We are allowed to start a complex value if and only if
-                # we can start a simple key.
-                if not self.allow_simple_key:
-                    raise ScannerError(None, None,
-                            "mapping values are not allowed here",
-                            self.get_mark())
-
-            # If this value starts a new block mapping, we need to add
-            # BLOCK-MAPPING-START.  It will be detected as an error later by
-            # the parser.
-            if not self.flow_level:
-                if self.add_indent(self.column):
-                    mark = self.get_mark()
-                    self.tokens.append(BlockMappingStartToken(mark, mark))
-
-            # Simple keys are allowed after ':' in the block context.
-            self.allow_simple_key = not self.flow_level
-
-            # Reset possible simple key on the current level.
-            self.remove_possible_simple_key()
-
-        # Add VALUE.
-        start_mark = self.get_mark()
-        self.forward()
-        end_mark = self.get_mark()
-        self.tokens.append(ValueToken(start_mark, end_mark))
-
-    def fetch_alias(self):
-
-        # ALIAS could be a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after ALIAS.
-        self.allow_simple_key = False
-
-        # Scan and add ALIAS.
-        self.tokens.append(self.scan_anchor(AliasToken))
-
-    def fetch_anchor(self):
-
-        # ANCHOR could start a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after ANCHOR.
-        self.allow_simple_key = False
-
-        # Scan and add ANCHOR.
-        self.tokens.append(self.scan_anchor(AnchorToken))
-
-    def fetch_tag(self):
-
-        # TAG could start a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after TAG.
-        self.allow_simple_key = False
-
-        # Scan and add TAG.
-        self.tokens.append(self.scan_tag())
-
-    def fetch_literal(self):
-        self.fetch_block_scalar(style='|')
-
-    def fetch_folded(self):
-        self.fetch_block_scalar(style='>')
-
-    def fetch_block_scalar(self, style):
-
-        # A simple key may follow a block scalar.
-        self.allow_simple_key = True
-
-        # Reset possible simple key on the current level.
-        self.remove_possible_simple_key()
-
-        # Scan and add SCALAR.
-        self.tokens.append(self.scan_block_scalar(style))
-
-    def fetch_single(self):
-        self.fetch_flow_scalar(style='\'')
-
-    def fetch_double(self):
-        self.fetch_flow_scalar(style='"')
-
-    def fetch_flow_scalar(self, style):
-
-        # A flow scalar could be a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after flow scalars.
-        self.allow_simple_key = False
-
-        # Scan and add SCALAR.
-        self.tokens.append(self.scan_flow_scalar(style))
-
-    def fetch_plain(self):
-
-        # A plain scalar could be a simple key.
-        self.save_possible_simple_key()
-
-        # No simple keys after plain scalars. But note that `scan_plain` will
-        # change this flag if the scan is finished at the beginning of the
-        # line.
-        self.allow_simple_key = False
-
-        # Scan and add SCALAR. May change `allow_simple_key`.
-        self.tokens.append(self.scan_plain())
-
-    # Checkers.
-
-    def check_directive(self):
-
-        # DIRECTIVE:        ^ '%' ...
-        # The '%' indicator is already checked.
-        if self.column == 0:
-            return True
-
-    def check_document_start(self):
-
-        # DOCUMENT-START:   ^ '---' (' '|'\n')
-        if self.column == 0:
-            if self.prefix(3) == '---'  \
-                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
-                return True
-
-    def check_document_end(self):
-
-        # DOCUMENT-END:     ^ '...' (' '|'\n')
-        if self.column == 0:
-            if self.prefix(3) == '...'  \
-                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
-                return True
-
-    def check_block_entry(self):
-
-        # BLOCK-ENTRY:      '-' (' '|'\n')
-        return self.peek(1) in '\0 \t\r\n\x85\u2028\u2029'
-
-    def check_key(self):
-
-        # KEY(flow context):    '?'
-        if self.flow_level:
-            return True
-
-        # KEY(block context):   '?' (' '|'\n')
-        else:
-            return self.peek(1) in '\0 \t\r\n\x85\u2028\u2029'
-
-    def check_value(self):
-
-        # VALUE(flow context):  ':'
-        if self.flow_level:
-            return True
-
-        # VALUE(block context): ':' (' '|'\n')
-        else:
-            return self.peek(1) in '\0 \t\r\n\x85\u2028\u2029'
-
-    def check_plain(self):
-
-        # A plain scalar may start with any non-space character except:
-        #   '-', '?', ':', ',', '[', ']', '{', '}',
-        #   '#', '&', '*', '!', '|', '>', '\'', '\"',
-        #   '%', '@', '`'.
-        #
-        # It may also start with
-        #   '-', '?', ':'
-        # if it is followed by a non-space character.
-        #
-        # Note that we limit the last rule to the block context (except the
-        # '-' character) because we want the flow context to be space
-        # independent.
-        ch = self.peek()
-        return ch not in '\0 \t\r\n\x85\u2028\u2029-?:,[]{}#&*!|>\'\"%@`'  \
-                or (self.peek(1) not in '\0 \t\r\n\x85\u2028\u2029'
-                        and (ch == '-' or (not self.flow_level and ch in '?:')))
-
-    # Scanners.
-
-    def scan_to_next_token(self):
-        # We ignore spaces, line breaks and comments.
-        # If we find a line break in the block context, we set the flag
-        # `allow_simple_key` on.
-        # The byte order mark is stripped if it's the first character in the
-        # stream. We do not yet support BOM inside the stream as the
-        # specification requires. Any such mark will be considered as a part
-        # of the document.
-        #
-        # TODO: We need to make tab handling rules more sane. A good rule is
-        #   Tabs cannot precede tokens
-        #   BLOCK-SEQUENCE-START, BLOCK-MAPPING-START, BLOCK-END,
-        #   KEY(block), VALUE(block), BLOCK-ENTRY
-        # So the checking code is
-        #   if <TAB>:
-        #       self.allow_simple_keys = False
-        # We also need to add the check for `allow_simple_keys == True` to
-        # `unwind_indent` before issuing BLOCK-END.
-        # Scanners for block, flow, and plain scalars need to be modified.
-
-        if self.index == 0 and self.peek() == '\uFEFF':
-            self.forward()
-        found = False
-        while not found:
-            while self.peek() == ' ':
-                self.forward()
-            if self.peek() == '#':
-                while self.peek() not in '\0\r\n\x85\u2028\u2029':
-                    self.forward()
-            if self.scan_line_break():
-                if not self.flow_level:
-                    self.allow_simple_key = True
-            else:
-                found = True
-
-    def scan_directive(self):
-        # See the specification for details.
-        start_mark = self.get_mark()
-        self.forward()
-        name = self.scan_directive_name(start_mark)
-        value = None
-        if name == 'YAML':
-            value = self.scan_yaml_directive_value(start_mark)
-            end_mark = self.get_mark()
-        elif name == 'TAG':
-            value = self.scan_tag_directive_value(start_mark)
-            end_mark = self.get_mark()
-        else:
-            end_mark = self.get_mark()
-            while self.peek() not in '\0\r\n\x85\u2028\u2029':
-                self.forward()
-        self.scan_directive_ignored_line(start_mark)
-        return DirectiveToken(name, value, start_mark, end_mark)
-
-    def scan_directive_name(self, start_mark):
-        # See the specification for details.
-        length = 0
-        ch = self.peek(length)
-        while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
-                or ch in '-_':
-            length += 1
-            ch = self.peek(length)
-        if not length:
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch, self.get_mark())
-        value = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch not in '\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch, self.get_mark())
-        return value
-
-    def scan_yaml_directive_value(self, start_mark):
-        # See the specification for details.
-        while self.peek() == ' ':
-            self.forward()
-        major = self.scan_yaml_directive_number(start_mark)
-        if self.peek() != '.':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a digit or '.', but found %r" % self.peek(),
-                    self.get_mark())
-        self.forward()
-        minor = self.scan_yaml_directive_number(start_mark)
-        if self.peek() not in '\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a digit or ' ', but found %r" % self.peek(),
-                    self.get_mark())
-        return (major, minor)
-
-    def scan_yaml_directive_number(self, start_mark):
-        # See the specification for details.
-        ch = self.peek()
-        if not ('0' <= ch <= '9'):
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a digit, but found %r" % ch, self.get_mark())
-        length = 0
-        while '0' <= self.peek(length) <= '9':
-            length += 1
-        value = int(self.prefix(length))
-        self.forward(length)
-        return value
-
-    def scan_tag_directive_value(self, start_mark):
-        # See the specification for details.
-        while self.peek() == ' ':
-            self.forward()
-        handle = self.scan_tag_directive_handle(start_mark)
-        while self.peek() == ' ':
-            self.forward()
-        prefix = self.scan_tag_directive_prefix(start_mark)
-        return (handle, prefix)
-
-    def scan_tag_directive_handle(self, start_mark):
-        # See the specification for details.
-        value = self.scan_tag_handle('directive', start_mark)
-        ch = self.peek()
-        if ch != ' ':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected ' ', but found %r" % ch, self.get_mark())
-        return value
-
-    def scan_tag_directive_prefix(self, start_mark):
-        # See the specification for details.
-        value = self.scan_tag_uri('directive', start_mark)
-        ch = self.peek()
-        if ch not in '\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected ' ', but found %r" % ch, self.get_mark())
-        return value
-
-    def scan_directive_ignored_line(self, start_mark):
-        # See the specification for details.
-        while self.peek() == ' ':
-            self.forward()
-        if self.peek() == '#':
-            while self.peek() not in '\0\r\n\x85\u2028\u2029':
-                self.forward()
-        ch = self.peek()
-        if ch not in '\0\r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a directive", start_mark,
-                    "expected a comment or a line break, but found %r"
-                        % ch, self.get_mark())
-        self.scan_line_break()
-
-    def scan_anchor(self, TokenClass):
-        # The specification does not restrict characters for anchors and
-        # aliases. This may lead to problems, for instance, the document:
-        #   [ *alias, value ]
-        # can be interpteted in two ways, as
-        #   [ "value" ]
-        # and
-        #   [ *alias , "value" ]
-        # Therefore we restrict aliases to numbers and ASCII letters.
-        start_mark = self.get_mark()
-        indicator = self.peek()
-        if indicator == '*':
-            name = 'alias'
-        else:
-            name = 'anchor'
-        self.forward()
-        length = 0
-        ch = self.peek(length)
-        while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
-                or ch in '-_':
-            length += 1
-            ch = self.peek(length)
-        if not length:
-            raise ScannerError("while scanning an %s" % name, start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch, self.get_mark())
-        value = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch not in '\0 \t\r\n\x85\u2028\u2029?:,]}%@`':
-            raise ScannerError("while scanning an %s" % name, start_mark,
-                    "expected alphabetic or numeric character, but found %r"
-                    % ch, self.get_mark())
-        end_mark = self.get_mark()
-        return TokenClass(value, start_mark, end_mark)
-
-    def scan_tag(self):
-        # See the specification for details.
-        start_mark = self.get_mark()
-        ch = self.peek(1)
-        if ch == '<':
-            handle = None
-            self.forward(2)
-            suffix = self.scan_tag_uri('tag', start_mark)
-            if self.peek() != '>':
-                raise ScannerError("while parsing a tag", start_mark,
-                        "expected '>', but found %r" % self.peek(),
-                        self.get_mark())
-            self.forward()
-        elif ch in '\0 \t\r\n\x85\u2028\u2029':
-            handle = None
-            suffix = '!'
-            self.forward()
-        else:
-            length = 1
-            use_handle = False
-            while ch not in '\0 \r\n\x85\u2028\u2029':
-                if ch == '!':
-                    use_handle = True
-                    break
-                length += 1
-                ch = self.peek(length)
-            handle = '!'
-            if use_handle:
-                handle = self.scan_tag_handle('tag', start_mark)
-            else:
-                handle = '!'
-                self.forward()
-            suffix = self.scan_tag_uri('tag', start_mark)
-        ch = self.peek()
-        if ch not in '\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a tag", start_mark,
-                    "expected ' ', but found %r" % ch, self.get_mark())
-        value = (handle, suffix)
-        end_mark = self.get_mark()
-        return TagToken(value, start_mark, end_mark)
-
-    def scan_block_scalar(self, style):
-        # See the specification for details.
-
-        if style == '>':
-            folded = True
-        else:
-            folded = False
-
-        chunks = []
-        start_mark = self.get_mark()
-
-        # Scan the header.
-        self.forward()
-        chomping, increment = self.scan_block_scalar_indicators(start_mark)
-        self.scan_block_scalar_ignored_line(start_mark)
-
-        # Determine the indentation level and go to the first non-empty line.
-        min_indent = self.indent+1
-        if min_indent < 1:
-            min_indent = 1
-        if increment is None:
-            breaks, max_indent, end_mark = self.scan_block_scalar_indentation()
-            indent = max(min_indent, max_indent)
-        else:
-            indent = min_indent+increment-1
-            breaks, end_mark = self.scan_block_scalar_breaks(indent)
-        line_break = ''
-
-        # Scan the inner part of the block scalar.
-        while self.column == indent and self.peek() != '\0':
-            chunks.extend(breaks)
-            leading_non_space = self.peek() not in ' \t'
-            length = 0
-            while self.peek(length) not in '\0\r\n\x85\u2028\u2029':
-                length += 1
-            chunks.append(self.prefix(length))
-            self.forward(length)
-            line_break = self.scan_line_break()
-            breaks, end_mark = self.scan_block_scalar_breaks(indent)
-            if self.column == indent and self.peek() != '\0':
-
-                # Unfortunately, folding rules are ambiguous.
-                #
-                # This is the folding according to the specification:
-                
-                if folded and line_break == '\n'    \
-                        and leading_non_space and self.peek() not in ' \t':
-                    if not breaks:
-                        chunks.append(' ')
-                else:
-                    chunks.append(line_break)
-                
-                # This is Clark Evans's interpretation (also in the spec
-                # examples):
-                #
-                #if folded and line_break == '\n':
-                #    if not breaks:
-                #        if self.peek() not in ' \t':
-                #            chunks.append(' ')
-                #        else:
-                #            chunks.append(line_break)
-                #else:
-                #    chunks.append(line_break)
-            else:
-                break
-
-        # Chomp the tail.
-        if chomping is not False:
-            chunks.append(line_break)
-        if chomping is True:
-            chunks.extend(breaks)
-
-        # We are done.
-        return ScalarToken(''.join(chunks), False, start_mark, end_mark,
-                style)
-
-    def scan_block_scalar_indicators(self, start_mark):
-        # See the specification for details.
-        chomping = None
-        increment = None
-        ch = self.peek()
-        if ch in '+-':
-            if ch == '+':
-                chomping = True
-            else:
-                chomping = False
-            self.forward()
-            ch = self.peek()
-            if ch in '0123456789':
-                increment = int(ch)
-                if increment == 0:
-                    raise ScannerError("while scanning a block scalar", start_mark,
-                            "expected indentation indicator in the range 1-9, but found 0",
-                            self.get_mark())
-                self.forward()
-        elif ch in '0123456789':
-            increment = int(ch)
-            if increment == 0:
-                raise ScannerError("while scanning a block scalar", start_mark,
-                        "expected indentation indicator in the range 1-9, but found 0",
-                        self.get_mark())
-            self.forward()
-            ch = self.peek()
-            if ch in '+-':
-                if ch == '+':
-                    chomping = True
-                else:
-                    chomping = False
-                self.forward()
-        ch = self.peek()
-        if ch not in '\0 \r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a block scalar", start_mark,
-                    "expected chomping or indentation indicators, but found %r"
-                    % ch, self.get_mark())
-        return chomping, increment
-
-    def scan_block_scalar_ignored_line(self, start_mark):
-        # See the specification for details.
-        while self.peek() == ' ':
-            self.forward()
-        if self.peek() == '#':
-            while self.peek() not in '\0\r\n\x85\u2028\u2029':
-                self.forward()
-        ch = self.peek()
-        if ch not in '\0\r\n\x85\u2028\u2029':
-            raise ScannerError("while scanning a block scalar", start_mark,
-                    "expected a comment or a line break, but found %r" % ch,
-                    self.get_mark())
-        self.scan_line_break()
-
-    def scan_block_scalar_indentation(self):
-        # See the specification for details.
-        chunks = []
-        max_indent = 0
-        end_mark = self.get_mark()
-        while self.peek() in ' \r\n\x85\u2028\u2029':
-            if self.peek() != ' ':
-                chunks.append(self.scan_line_break())
-                end_mark = self.get_mark()
-            else:
-                self.forward()
-                if self.column > max_indent:
-                    max_indent = self.column
-        return chunks, max_indent, end_mark
-
-    def scan_block_scalar_breaks(self, indent):
-        # See the specification for details.
-        chunks = []
-        end_mark = self.get_mark()
-        while self.column < indent and self.peek() == ' ':
-            self.forward()
-        while self.peek() in '\r\n\x85\u2028\u2029':
-            chunks.append(self.scan_line_break())
-            end_mark = self.get_mark()
-            while self.column < indent and self.peek() == ' ':
-                self.forward()
-        return chunks, end_mark
-
-    def scan_flow_scalar(self, style):
-        # See the specification for details.
-        # Note that we loose indentation rules for quoted scalars. Quoted
-        # scalars don't need to adhere indentation because " and ' clearly
-        # mark the beginning and the end of them. Therefore we are less
-        # restrictive then the specification requires. We only need to check
-        # that document separators are not included in scalars.
-        if style == '"':
-            double = True
-        else:
-            double = False
-        chunks = []
-        start_mark = self.get_mark()
-        quote = self.peek()
-        self.forward()
-        chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
-        while self.peek() != quote:
-            chunks.extend(self.scan_flow_scalar_spaces(double, start_mark))
-            chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
-        self.forward()
-        end_mark = self.get_mark()
-        return ScalarToken(''.join(chunks), False, start_mark, end_mark,
-                style)
-
-    ESCAPE_REPLACEMENTS = {
-        '0':    '\0',
-        'a':    '\x07',
-        'b':    '\x08',
-        't':    '\x09',
-        '\t':   '\x09',
-        'n':    '\x0A',
-        'v':    '\x0B',
-        'f':    '\x0C',
-        'r':    '\x0D',
-        'e':    '\x1B',
-        ' ':    '\x20',
-        '\"':   '\"',
-        '\\':   '\\',
-        'N':    '\x85',
-        '_':    '\xA0',
-        'L':    '\u2028',
-        'P':    '\u2029',
-    }
-
-    ESCAPE_CODES = {
-        'x':    2,
-        'u':    4,
-        'U':    8,
-    }
-
-    def scan_flow_scalar_non_spaces(self, double, start_mark):
-        # See the specification for details.
-        chunks = []
-        while True:
-            length = 0
-            while self.peek(length) not in '\'\"\\\0 \t\r\n\x85\u2028\u2029':
-                length += 1
-            if length:
-                chunks.append(self.prefix(length))
-                self.forward(length)
-            ch = self.peek()
-            if not double and ch == '\'' and self.peek(1) == '\'':
-                chunks.append('\'')
-                self.forward(2)
-            elif (double and ch == '\'') or (not double and ch in '\"\\'):
-                chunks.append(ch)
-                self.forward()
-            elif double and ch == '\\':
-                self.forward()
-                ch = self.peek()
-                if ch in self.ESCAPE_REPLACEMENTS:
-                    chunks.append(self.ESCAPE_REPLACEMENTS[ch])
-                    self.forward()
-                elif ch in self.ESCAPE_CODES:
-                    length = self.ESCAPE_CODES[ch]
-                    self.forward()
-                    for k in range(length):
-                        if self.peek(k) not in '0123456789ABCDEFabcdef':
-                            raise ScannerError("while scanning a double-quoted scalar", start_mark,
-                                    "expected escape sequence of %d hexdecimal numbers, but found %r" %
-                                        (length, self.peek(k)), self.get_mark())
-                    code = int(self.prefix(length), 16)
-                    chunks.append(chr(code))
-                    self.forward(length)
-                elif ch in '\r\n\x85\u2028\u2029':
-                    self.scan_line_break()
-                    chunks.extend(self.scan_flow_scalar_breaks(double, start_mark))
-                else:
-                    raise ScannerError("while scanning a double-quoted scalar", start_mark,
-                            "found unknown escape character %r" % ch, self.get_mark())
-            else:
-                return chunks
-
-    def scan_flow_scalar_spaces(self, double, start_mark):
-        # See the specification for details.
-        chunks = []
-        length = 0
-        while self.peek(length) in ' \t':
-            length += 1
-        whitespaces = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch == '\0':
-            raise ScannerError("while scanning a quoted scalar", start_mark,
-                    "found unexpected end of stream", self.get_mark())
-        elif ch in '\r\n\x85\u2028\u2029':
-            line_break = self.scan_line_break()
-            breaks = self.scan_flow_scalar_breaks(double, start_mark)
-            if line_break != '\n':
-                chunks.append(line_break)
-            elif not breaks:
-                chunks.append(' ')
-            chunks.extend(breaks)
-        else:
-            chunks.append(whitespaces)
-        return chunks
-
-    def scan_flow_scalar_breaks(self, double, start_mark):
-        # See the specification for details.
-        chunks = []
-        while True:
-            # Instead of checking indentation, we check for document
-            # separators.
-            prefix = self.prefix(3)
-            if (prefix == '---' or prefix == '...')   \
-                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
-                raise ScannerError("while scanning a quoted scalar", start_mark,
-                        "found unexpected document separator", self.get_mark())
-            while self.peek() in ' \t':
-                self.forward()
-            if self.peek() in '\r\n\x85\u2028\u2029':
-                chunks.append(self.scan_line_break())
-            else:
-                return chunks
-
-    def scan_plain(self):
-        # See the specification for details.
-        # We add an additional restriction for the flow context:
-        #   plain scalars in the flow context cannot contain ',', ':' and '?'.
-        # We also keep track of the `allow_simple_key` flag here.
-        # Indentation rules are loosed for the flow context.
-        chunks = []
-        start_mark = self.get_mark()
-        end_mark = start_mark
-        indent = self.indent+1
-        # We allow zero indentation for scalars, but then we need to check for
-        # document separators at the beginning of the line.
-        #if indent == 0:
-        #    indent = 1
-        spaces = []
-        while True:
-            length = 0
-            if self.peek() == '#':
-                break
-            while True:
-                ch = self.peek(length)
-                if ch in '\0 \t\r\n\x85\u2028\u2029'    \
-                        or (not self.flow_level and ch == ':' and
-                                self.peek(length+1) in '\0 \t\r\n\x85\u2028\u2029') \
-                        or (self.flow_level and ch in ',:?[]{}'):
-                    break
-                length += 1
-            # It's not clear what we should do with ':' in the flow context.
-            if (self.flow_level and ch == ':'
-                    and self.peek(length+1) not in '\0 \t\r\n\x85\u2028\u2029,[]{}'):
-                self.forward(length)
-                raise ScannerError("while scanning a plain scalar", start_mark,
-                    "found unexpected ':'", self.get_mark(),
-                    "Please check http://pyyaml.org/wiki/YAMLColonInFlowContext for details.")
-            if length == 0:
-                break
-            self.allow_simple_key = False
-            chunks.extend(spaces)
-            chunks.append(self.prefix(length))
-            self.forward(length)
-            end_mark = self.get_mark()
-            spaces = self.scan_plain_spaces(indent, start_mark)
-            if not spaces or self.peek() == '#' \
-                    or (not self.flow_level and self.column < indent):
-                break
-        return ScalarToken(''.join(chunks), True, start_mark, end_mark)
-
-    def scan_plain_spaces(self, indent, start_mark):
-        # See the specification for details.
-        # The specification is really confusing about tabs in plain scalars.
-        # We just forbid them completely. Do not use tabs in YAML!
-        chunks = []
-        length = 0
-        while self.peek(length) in ' ':
-            length += 1
-        whitespaces = self.prefix(length)
-        self.forward(length)
-        ch = self.peek()
-        if ch in '\r\n\x85\u2028\u2029':
-            line_break = self.scan_line_break()
-            self.allow_simple_key = True
-            prefix = self.prefix(3)
-            if (prefix == '---' or prefix == '...')   \
-                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
-                return
-            breaks = []
-            while self.peek() in ' \r\n\x85\u2028\u2029':
-                if self.peek() == ' ':
-                    self.forward()
-                else:
-                    breaks.append(self.scan_line_break())
-                    prefix = self.prefix(3)
-                    if (prefix == '---' or prefix == '...')   \
-                            and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
-                        return
-            if line_break != '\n':
-                chunks.append(line_break)
-            elif not breaks:
-                chunks.append(' ')
-            chunks.extend(breaks)
-        elif whitespaces:
-            chunks.append(whitespaces)
-        return chunks
-
-    def scan_tag_handle(self, name, start_mark):
-        # See the specification for details.
-        # For some strange reasons, the specification does not allow '_' in
-        # tag handles. I have allowed it anyway.
-        ch = self.peek()
-        if ch != '!':
-            raise ScannerError("while scanning a %s" % name, start_mark,
-                    "expected '!', but found %r" % ch, self.get_mark())
-        length = 1
-        ch = self.peek(length)
-        if ch != ' ':
-            while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
-                    or ch in '-_':
-                length += 1
-                ch = self.peek(length)
-            if ch != '!':
-                self.forward(length)
-                raise ScannerError("while scanning a %s" % name, start_mark,
-                        "expected '!', but found %r" % ch, self.get_mark())
-            length += 1
-        value = self.prefix(length)
-        self.forward(length)
-        return value
-
-    def scan_tag_uri(self, name, start_mark):
-        # See the specification for details.
-        # Note: we do not check if URI is well-formed.
-        chunks = []
-        length = 0
-        ch = self.peek(length)
-        while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
-                or ch in '-;/?:@&=+$,_.!~*\'()[]%':
-            if ch == '%':
-                chunks.append(self.prefix(length))
-                self.forward(length)
-                length = 0
-                chunks.append(self.scan_uri_escapes(name, start_mark))
-            else:
-                length += 1
-            ch = self.peek(length)
-        if length:
-            chunks.append(self.prefix(length))
-            self.forward(length)
-            length = 0
-        if not chunks:
-            raise ScannerError("while parsing a %s" % name, start_mark,
-                    "expected URI, but found %r" % ch, self.get_mark())
-        return ''.join(chunks)
-
-    def scan_uri_escapes(self, name, start_mark):
-        # See the specification for details.
-        codes = []
-        mark = self.get_mark()
-        while self.peek() == '%':
-            self.forward()
-            for k in range(2):
-                if self.peek(k) not in '0123456789ABCDEFabcdef':
-                    raise ScannerError("while scanning a %s" % name, start_mark,
-                            "expected URI escape sequence of 2 hexdecimal numbers, but found %r"
-                            % self.peek(k), self.get_mark())
-            codes.append(int(self.prefix(2), 16))
-            self.forward(2)
-        try:
-            value = bytes(codes).decode('utf-8')
-        except UnicodeDecodeError as exc:
-            raise ScannerError("while scanning a %s" % name, start_mark, str(exc), mark)
-        return value
-
-    def scan_line_break(self):
-        # Transforms:
-        #   '\r\n'      :   '\n'
-        #   '\r'        :   '\n'
-        #   '\n'        :   '\n'
-        #   '\x85'      :   '\n'
-        #   '\u2028'    :   '\u2028'
-        #   '\u2029     :   '\u2029'
-        #   default     :   ''
-        ch = self.peek()
-        if ch in '\r\n\x85':
-            if self.prefix(2) == '\r\n':
-                self.forward(2)
-            else:
-                self.forward()
-            return '\n'
-        elif ch in '\u2028\u2029':
-            self.forward()
-            return ch
-        return ''
-
-#try:
-#    import psyco
-#    psyco.bind(Scanner)
-#except ImportError:
-#    pass
-
diff --git a/python.d/python_modules/pyyaml3/serializer.py b/python.d/python_modules/pyyaml3/serializer.py
deleted file mode 100644
index fe911e67..00000000
--- a/python.d/python_modules/pyyaml3/serializer.py
+++ /dev/null
@@ -1,111 +0,0 @@
-
-__all__ = ['Serializer', 'SerializerError']
-
-from .error import YAMLError
-from .events import *
-from .nodes import *
-
-class SerializerError(YAMLError):
-    pass
-
-class Serializer:
-
-    ANCHOR_TEMPLATE = 'id%03d'
-
-    def __init__(self, encoding=None,
-            explicit_start=None, explicit_end=None, version=None, tags=None):
-        self.use_encoding = encoding
-        self.use_explicit_start = explicit_start
-        self.use_explicit_end = explicit_end
-        self.use_version = version
-        self.use_tags = tags
-        self.serialized_nodes = {}
-        self.anchors = {}
-        self.last_anchor_id = 0
-        self.closed = None
-
-    def open(self):
-        if self.closed is None:
-            self.emit(StreamStartEvent(encoding=self.use_encoding))
-            self.closed = False
-        elif self.closed:
-            raise SerializerError("serializer is closed")
-        else:
-            raise SerializerError("serializer is already opened")
-
-    def close(self):
-        if self.closed is None:
-            raise SerializerError("serializer is not opened")
-        elif not self.closed:
-            self.emit(StreamEndEvent())
-            self.closed = True
-
-    #def __del__(self):
-    #    self.close()
-
-    def serialize(self, node):
-        if self.closed is None:
-            raise SerializerError("serializer is not opened")
-        elif self.closed:
-            raise SerializerError("serializer is closed")
-        self.emit(DocumentStartEvent(explicit=self.use_explicit_start,
-            version=self.use_version, tags=self.use_tags))
-        self.anchor_node(node)
-        self.serialize_node(node, None, None)
-        self.emit(DocumentEndEvent(explicit=self.use_explicit_end))
-        self.serialized_nodes = {}
-        self.anchors = {}
-        self.last_anchor_id = 0
-
-    def anchor_node(self, node):
-        if node in self.anchors:
-            if self.anchors[node] is None:
-                self.anchors[node] = self.generate_anchor(node)
-        else:
-            self.anchors[node] = None
-            if isinstance(node, SequenceNode):
-                for item in node.value:
-                    self.anchor_node(item)
-            elif isinstance(node, MappingNode):
-                for key, value in node.value:
-                    self.anchor_node(key)
-                    self.anchor_node(value)
-
-    def generate_anchor(self, node):
-        self.last_anchor_id += 1
-        return self.ANCHOR_TEMPLATE % self.last_anchor_id
-
-    def serialize_node(self, node, parent, index):
-        alias = self.anchors[node]
-        if node in self.serialized_nodes:
-            self.emit(AliasEvent(alias))
-        else:
-            self.serialized_nodes[node] = True
-            self.descend_resolver(parent, index)
-            if isinstance(node, ScalarNode):
-                detected_tag = self.resolve(ScalarNode, node.value, (True, False))
-                default_tag = self.resolve(ScalarNode, node.value, (False, True))
-                implicit = (node.tag == detected_tag), (node.tag == default_tag)
-                self.emit(ScalarEvent(alias, node.tag, implicit, node.value,
-                    style=node.style))
-            elif isinstance(node, SequenceNode):
-                implicit = (node.tag
-                            == self.resolve(SequenceNode, node.value, True))
-                self.emit(SequenceStartEvent(alias, node.tag, implicit,
-                    flow_style=node.flow_style))
-                index = 0
-                for item in node.value:
-                    self.serialize_node(item, node, index)
-                    index += 1
-                self.emit(SequenceEndEvent())
-            elif isinstance(node, MappingNode):
-                implicit = (node.tag
-                            == self.resolve(MappingNode, node.value, True))
-                self.emit(MappingStartEvent(alias, node.tag, implicit,
-                    flow_style=node.flow_style))
-                for key, value in node.value:
-                    self.serialize_node(key, node, None)
-                    self.serialize_node(value, node, key)
-                self.emit(MappingEndEvent())
-            self.ascend_resolver()
-
diff --git a/python.d/python_modules/pyyaml3/tokens.py b/python.d/python_modules/pyyaml3/tokens.py
deleted file mode 100644
index 4d0b48a3..00000000
--- a/python.d/python_modules/pyyaml3/tokens.py
+++ /dev/null
@@ -1,104 +0,0 @@
-
-class Token(object):
-    def __init__(self, start_mark, end_mark):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-    def __repr__(self):
-        attributes = [key for key in self.__dict__
-                if not key.endswith('_mark')]
-        attributes.sort()
-        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
-                for key in attributes])
-        return '%s(%s)' % (self.__class__.__name__, arguments)
-
-#class BOMToken(Token):
-#    id = '<byte order mark>'
-
-class DirectiveToken(Token):
-    id = '<directive>'
-    def __init__(self, name, value, start_mark, end_mark):
-        self.name = name
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class DocumentStartToken(Token):
-    id = '<document start>'
-
-class DocumentEndToken(Token):
-    id = '<document end>'
-
-class StreamStartToken(Token):
-    id = '<stream start>'
-    def __init__(self, start_mark=None, end_mark=None,
-            encoding=None):
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.encoding = encoding
-
-class StreamEndToken(Token):
-    id = '<stream end>'
-
-class BlockSequenceStartToken(Token):
-    id = '<block sequence start>'
-
-class BlockMappingStartToken(Token):
-    id = '<block mapping start>'
-
-class BlockEndToken(Token):
-    id = '<block end>'
-
-class FlowSequenceStartToken(Token):
-    id = '['
-
-class FlowMappingStartToken(Token):
-    id = '{'
-
-class FlowSequenceEndToken(Token):
-    id = ']'
-
-class FlowMappingEndToken(Token):
-    id = '}'
-
-class KeyToken(Token):
-    id = '?'
-
-class ValueToken(Token):
-    id = ':'
-
-class BlockEntryToken(Token):
-    id = '-'
-
-class FlowEntryToken(Token):
-    id = ','
-
-class AliasToken(Token):
-    id = '<alias>'
-    def __init__(self, value, start_mark, end_mark):
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class AnchorToken(Token):
-    id = '<anchor>'
-    def __init__(self, value, start_mark, end_mark):
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class TagToken(Token):
-    id = '<tag>'
-    def __init__(self, value, start_mark, end_mark):
-        self.value = value
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-
-class ScalarToken(Token):
-    id = '<scalar>'
-    def __init__(self, value, plain, start_mark, end_mark, style=None):
-        self.value = value
-        self.plain = plain
-        self.start_mark = start_mark
-        self.end_mark = end_mark
-        self.style = style
-
diff --git a/python.d/redis.chart.py b/python.d/redis.chart.py
index 218401e1..61f4f6d6 100644
--- a/python.d/redis.chart.py
+++ b/python.d/redis.chart.py
@@ -19,40 +19,58 @@ retries = 60
 #             'unix_socket': None
 #          }}
 
-ORDER = ['operations', 'hit_rate', 'memory', 'keys', 'clients', 'slaves']
+ORDER = ['operations', 'hit_rate', 'memory', 'keys', 'net', 'connections', 'clients', 'slaves', 'persistence']
 
 CHARTS = {
     'operations': {
-        'options': [None, 'Operations', 'operations/s', 'Statistics', 'redis.operations', 'line'],
+        'options': [None, 'Redis Operations', 'operations/s', 'operations', 'redis.operations', 'line'],
         'lines': [
+            ['total_commands_processed', 'commands', 'incremental'],
             ['instantaneous_ops_per_sec', 'operations', 'absolute']
         ]},
     'hit_rate': {
-        'options': [None, 'Hit rate', 'percent', 'Statistics', 'redis.hit_rate', 'line'],
+        'options': [None, 'Redis Hit rate', 'percent', 'hits', 'redis.hit_rate', 'line'],
         'lines': [
             ['hit_rate', 'rate', 'absolute']
         ]},
     'memory': {
-        'options': [None, 'Memory utilization', 'kilobytes', 'Memory', 'redis.memory', 'line'],
+        'options': [None, 'Redis Memory utilization', 'kilobytes', 'memory', 'redis.memory', 'line'],
         'lines': [
             ['used_memory', 'total', 'absolute', 1, 1024],
             ['used_memory_lua', 'lua', 'absolute', 1, 1024]
         ]},
+    'net': {
+        'options': [None, 'Redis Bandwidth', 'kilobits/s', 'network', 'redis.net', 'area'],
+        'lines': [
+            ['total_net_input_bytes', 'in', 'incremental', 8, 1024],
+            ['total_net_output_bytes', 'out', 'incremental', -8, 1024]
+        ]},
     'keys': {
-        'options': [None, 'Database keys', 'keys', 'Keys', 'redis.keys', 'line'],
+        'options': [None, 'Redis Keys per Database', 'keys', 'keys', 'redis.keys', 'line'],
         'lines': [
             # lines are created dynamically in `check()` method
         ]},
+    'connections': {
+        'options': [None, 'Redis Connections', 'connections/s', 'connections', 'redis.connections', 'line'],
+        'lines': [
+            ['total_connections_received', 'received', 'incremental', 1],
+            ['rejected_connections', 'rejected', 'incremental', -1]
+        ]},
     'clients': {
-        'options': [None, 'Clients', 'clients', 'Clients', 'redis.clients', 'line'],
+        'options': [None, 'Redis Clients', 'clients', 'connections', 'redis.clients', 'line'],
         'lines': [
-            ['connected_clients', 'connected', 'absolute'],
-            ['blocked_clients', 'blocked', 'absolute']
+            ['connected_clients', 'connected', 'absolute', 1],
+            ['blocked_clients', 'blocked', 'absolute', -1]
         ]},
     'slaves': {
-        'options': [None, 'Slaves', 'slaves', 'Replication', 'redis.slaves', 'line'],
+        'options': [None, 'Redis Slaves', 'slaves', 'replication', 'redis.slaves', 'line'],
         'lines': [
             ['connected_slaves', 'connected', 'absolute']
+        ]},
+    'persistence': {
+        'options': [None, 'Redis Persistence Changes Since Last Save', 'changes', 'persistence', 'redis.rdb_changes', 'line'],
+        'lines': [
+            ['rdb_changes_since_last_save', 'changes', 'absolute']
         ]}
 }
 
@@ -61,46 +79,73 @@ class Service(SocketService):
     def __init__(self, configuration=None, name=None):
         SocketService.__init__(self, configuration=configuration, name=name)
         self.request = "INFO\r\n"
-        self.host = "localhost"
-        self.port = 6379
-        self.unix_socket = None
         self.order = ORDER
         self.definitions = CHARTS
         self._keep_alive = True
         self.chart_name = ""
+        self.passwd = None
+        self.port = 6379
+        if 'port' in configuration:
+            self.port = configuration['port']
+        if 'pass' in configuration:
+            self.passwd = configuration['pass']
+        if 'host' in configuration:
+            self.host = configuration['host']
+        if 'socket' in configuration:
+            self.unix_socket = configuration['socket']
 
     def _get_data(self):
         """
         Get data from socket
         :return: dict
         """
+        if self.passwd:
+            info_request = self.request
+            self.request = "AUTH " + self.passwd + "\r\n"
+            raw = self._get_raw_data().strip()
+            if raw != "+OK":
+                self.error("invalid password")
+                return None
+            self.request = info_request
+        response = self._get_raw_data()
+        if response is None:
+            # error has already been logged
+            return None
+
         try:
-            raw = self._get_raw_data().split("\n")
+            parsed = response.split("\n")
         except AttributeError:
-            self.error("no data received")
+            self.error("response is invalid/empty")
             return None
+
         data = {}
-        for line in raw:
-            if line.startswith(('instantaneous', 'keyspace', 'used_memory', 'connected', 'blocked')):
-                try:
-                    t = line.split(':')
-                    data[t[0]] = int(t[1])
-                except (IndexError, ValueError):
-                    pass
-            elif line.startswith('db'):
+        for line in parsed:
+            if len(line) < 5 or line[0] == '$' or line[0] == '#':
+                continue
+
+            if line.startswith('db'):
                 tmp = line.split(',')[0].replace('keys=', '')
                 record = tmp.split(':')
-                data[record[0]] = int(record[1])
+                data[record[0]] = record[1]
+                continue
+
+            try:
+                t = line.split(':')
+                data[t[0]] = t[1]
+            except (IndexError, ValueError):
+                self.debug("invalid line received: " + str(line))
+                pass
+
+        if len(data) == 0:
+            self.error("received data doesn't have any records")
+            return None
+
         try:
-            data['hit_rate'] = int((data['keyspace_hits'] / float(data['keyspace_hits'] + data['keyspace_misses'])) * 100)
+            data['hit_rate'] = (int(data['keyspace_hits']) * 100) / (int(data['keyspace_hits']) + int(data['keyspace_misses']))
         except:
             data['hit_rate'] = 0
 
-        if len(data) == 0:
-            self.error("received data doesn't have needed records")
-            return None
-        else:
-            return data
+        return data
 
     def _check_raw_data(self, data):
         """
@@ -112,12 +157,15 @@ class Service(SocketService):
         length = len(data)
         supposed = data.split('\n')[0][1:]
         offset = len(supposed) + 4  # 1 dollar sing, 1 new line character + 1 ending sequence '\r\n'
+        if not supposed.isdigit():
+            return True
         supposed = int(supposed)
+
         if length - offset >= supposed:
+            self.debug("received full response from redis")
             return True
-        else:
-            return False
 
+        self.debug("waiting more data from redis")
         return False
 
     def check(self):
diff --git a/python.d/sensors.chart.py b/python.d/sensors.chart.py
index 23bccb97..e83aacfd 100644
--- a/python.d/sensors.chart.py
+++ b/python.d/sensors.chart.py
@@ -77,6 +77,9 @@ class Service(SimpleService):
         SimpleService.__init__(self, configuration=configuration, name=name)
         self.order = []
         self.definitions = {}
+        self.celsius = ('Celsius', lambda x: x)
+        self.fahrenheit = ('Fahrenheit', lambda x: x * 9 / 5 + 32)  if self.configuration.get('fahrenheit') else False
+        self.choice = (choice for choice in [self.fahrenheit, self.celsius] if choice)
         self.chips = []
 
     def _get_data(self):
@@ -94,7 +97,10 @@ class Service(SimpleService):
                         limit = LIMITS[typeName];
                         if val < limit[0] or val > limit[1]:
                             continue
-                    data[prefix + "_" + str(feature.name.decode())] = int(val * 1000)
+                    if 'temp' in str(feature.name.decode()):
+                        data[prefix + "_" + str(feature.name.decode())] = int(self.calc(val) * 1000)
+                    else:
+                        data[prefix + "_" + str(feature.name.decode())] = int(val * 1000)
         except Exception as e:
             self.error(e)
             return None
@@ -121,6 +127,8 @@ class Service(SimpleService):
                             self.order.append(name)
                             chart_def = list(CHARTS[type]['options'])
                             chart_def[1] = chip_name + chart_def[1]
+                            if chart_def[2] == 'Celsius':
+                                chart_def[2] = self.choice[0]
                             self.definitions[name] = {'options': chart_def}
                             self.definitions[name]['lines'] = []
                         line = list(CHARTS[type]['lines'][0])
@@ -134,10 +142,20 @@ class Service(SimpleService):
         except Exception as e:
             self.error(e)
             return False
+        
+        try:
+            self.choice = next(self.choice)
+        except StopIteration:
+            # That can not happen but..
+            self.choice = ('Celsius', lambda x: x)
+            self.calc = self.choice[1]
+        else:
+            self.calc = self.choice[1]
 
         try:
             self._create_definitions()
         except Exception as e:
             self.error(e)
             return False
+
         return True
diff --git a/python.d/squid.chart.py b/python.d/squid.chart.py
index 8300d9ba..e9e8f1d0 100644
--- a/python.d/squid.chart.py
+++ b/python.d/squid.chart.py
@@ -58,20 +58,25 @@ class Service(SocketService):
         Get data via http request
         :return: dict
         """
+        response = self._get_raw_data()
+
         data = {}
         try:
             raw = ""
-            for tmp in self._get_raw_data().split('\r\n'):
+            for tmp in response.split('\r\n'):
                 if tmp.startswith("sample_time"):
                     raw = tmp
                     break
+
             if raw.startswith('<'):
                 self.error("invalid data received")
                 return None
+
             for row in raw.split('\n'):
                 if row.startswith(("client", "server.all")):
                     tmp = row.split("=")
                     data[tmp[0].replace('.', '_').strip(' ')] = int(tmp[1])
+
         except (ValueError, AttributeError, TypeError):
             self.error("invalid data received")
             return None
@@ -83,15 +88,19 @@ class Service(SocketService):
             return data
 
     def _check_raw_data(self, data):
-        if "Connection: keep-alive" in data[:1024]:
+        header = data[:1024].lower()
+
+        if "connection: keep-alive" in header:
             self._keep_alive = True
         else:
             self._keep_alive = False
 
-        if data[-7:] == "\r\n0\r\n\r\n" and "Transfer-Encoding: chunked" in data[:1024]:  # HTTP/1.1 response
+        if data[-7:] == "\r\n0\r\n\r\n" and "transfer-encoding: chunked" in header:  # HTTP/1.1 response
+            self.debug("received full response from squid")
             return True
-        else:
-            return False
+
+        self.debug("waiting more data from squid")
+        return False
 
     def check(self):
         """
diff --git a/python.d/varnish.chart.py b/python.d/varnish.chart.py
new file mode 100644
index 00000000..2b1512f4
--- /dev/null
+++ b/python.d/varnish.chart.py
@@ -0,0 +1,239 @@
+# -*- coding: utf-8 -*-
+# Description:  varnish netdata python.d module
+# Author: l2isbad
+
+from base import SimpleService
+from re import compile
+from os import access as is_executable, X_OK
+from subprocess import Popen, PIPE
+
+
+# default module values (can be overridden per job in `config`)
+# update_every = 2
+priority = 60000
+retries = 60
+
+ORDER = ['session', 'hit_rate', 'chit_rate', 'expunge', 'threads', 'backend_health', 'memory_usage', 'bad', 'uptime']
+
+CHARTS = {'backend_health': 
+             {'lines': [['backend_conn', 'conn', 'incremental', 1, 1],
+                       ['backend_unhealthy', 'unhealthy', 'incremental', 1, 1],
+                       ['backend_busy', 'busy', 'incremental', 1, 1],
+                       ['backend_fail', 'fail', 'incremental', 1, 1],
+                       ['backend_reuse', 'reuse', 'incremental', 1, 1],
+                       ['backend_recycle', 'resycle', 'incremental', 1, 1],
+                       ['backend_toolate', 'toolate', 'incremental', 1, 1],
+                       ['backend_retry', 'retry', 'incremental', 1, 1],
+                       ['backend_req', 'req', 'incremental', 1, 1]],
+              'options': [None, 'Backend health', 'connections', 'Backend health', 'varnish.backend_traf', 'line']},
+          'bad': 
+             {'lines': [['sess_drop_b', None, 'incremental', 1, 1],
+                       ['backend_unhealthy_b', None, 'incremental', 1, 1],
+                       ['fetch_failed', None, 'incremental', 1, 1],
+                       ['backend_busy_b', None, 'incremental', 1, 1],
+                       ['threads_failed_b', None, 'incremental', 1, 1],
+                       ['threads_limited_b', None, 'incremental', 1, 1],
+                       ['threads_destroyed_b', None, 'incremental', 1, 1],
+                       ['thread_queue_len_b', 'queue_len', 'absolute', 1, 1],
+                       ['losthdr_b', None, 'incremental', 1, 1],
+                       ['esi_errors_b', None, 'incremental', 1, 1],
+                       ['esi_warnings_b', None, 'incremental', 1, 1],
+                       ['sess_fail_b', None, 'incremental', 1, 1],
+                       ['sc_pipe_overflow_b', None, 'incremental', 1, 1],
+                       ['sess_pipe_overflow_b', None, 'incremental', 1, 1]],
+              'options': [None, 'Misbehavior', 'problems', 'Problems summary', 'varnish.bad', 'line']},
+          'expunge':
+             {'lines': [['n_expired', 'expired', 'incremental', 1, 1],
+                       ['n_lru_nuked', 'lru_nuked', 'incremental', 1, 1]],
+              'options': [None, 'Object expunging', 'objects', 'Cache performance', 'varnish.expunge', 'line']},
+          'hit_rate': 
+             {'lines': [['cache_hit_perc', 'hit', 'absolute', 1, 100],
+                       ['cache_miss_perc', 'miss', 'absolute', 1, 100],
+                       ['cache_hitpass_perc', 'hitpass', 'absolute', 1, 100]],
+              'options': [None, 'All history hit rate ratio','percent', 'Cache performance', 'varnish.hit_rate', 'stacked']},
+          'chit_rate': 
+             {'lines': [['cache_hit_cperc', 'hit', 'absolute', 1, 100],
+                       ['cache_miss_cperc', 'miss', 'absolute', 1, 100],
+                       ['cache_hitpass_cperc', 'hitpass', 'absolute', 1, 100]],
+              'options': [None, 'Current poll hit rate ratio','percent', 'Cache performance', 'varnish.chit_rate', 'stacked']},
+          'memory_usage': 
+             {'lines': [['s0.g_space', 'available', 'absolute', 1, 1048576],
+                       ['s0.g_bytes', 'allocated', 'absolute', -1, 1048576]],
+              'options': [None, 'Memory usage', 'megabytes', 'Memory usage', 'varnish.memory_usage', 'stacked']},
+          'session': 
+             {'lines': [['sess_conn', 'sess_conn', 'incremental', 1, 1],
+                       ['client_req', 'client_requests', 'incremental', 1, 1],
+                       ['client_conn', 'client_conn', 'incremental', 1, 1],
+                       ['client_drop', 'client_drop', 'incremental', 1, 1],
+                       ['sess_dropped', 'sess_dropped', 'incremental', 1, 1]],
+              'options': [None, 'Sessions', 'units', 'Client metrics', 'varnish.session', 'line']},
+          'threads': 
+             {'lines': [['threads', None, 'absolute', 1, 1],
+                       ['threads_created', 'created', 'incremental', 1, 1],
+                       ['threads_failed', 'failed', 'incremental', 1, 1],
+                       ['threads_limited', 'limited', 'incremental', 1, 1],
+                       ['thread_queue_len', 'queue_len', 'incremental', 1, 1],
+                       ['sess_queued', 'sess_queued', 'incremental', 1, 1]],
+              'options': [None, 'Thread status', 'threads', 'Thread-related metrics', 'varnish.threads', 'line']},
+          'uptime': 
+             {'lines': [['uptime', None, 'absolute', 1, 1]],
+              'options': [None, 'Varnish uptime', 'seconds', 'Uptime', 'varnish.uptime', 'line']}
+}
+
+DIRECTORIES = ['/bin/', '/usr/bin/', '/sbin/', '/usr/sbin/']
+
+
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        try:
+            self.varnish = [''.join([directory, 'varnishstat']) for directory in DIRECTORIES
+                         if is_executable(''.join([directory, 'varnishstat']), X_OK)][0]
+        except IndexError:
+            self.varnish = False
+        self.rgx_all = compile(r'([A-Z]+\.)?([\d\w_.]+)\s+(\d+)')
+        # Could be
+        # VBE.boot.super_backend.pipe_hdrbyte (new)
+        # or
+        # VBE.default2(127.0.0.2,,81).bereq_bodybytes (old)
+        # Regex result: [('super_backend', 'beresp_hdrbytes', '0'), ('super_backend', 'beresp_bodybytes', '0')]
+        self.rgx_bck = (compile(r'VBE.([\d\w_.]+)\(.*?\).(beresp[\w_]+)\s+(\d+)'),
+                        compile(r'VBE\.[\d\w-]+\.([\w\d_]+).(beresp[\w_]+)\s+(\d+)'))
+        self.cache_prev = list()
+
+    def check(self):
+        # Cant start without 'varnishstat' command
+        if not self.varnish:
+            self.error('\'varnishstat\' command was not found in %s or not executable by netdata' % DIRECTORIES)
+            return False
+
+        # If command is present and we can execute it we need to make sure..
+        # 1. STDOUT is not empty
+        reply = self._get_raw_data()
+        if not reply:
+            self.error('No output from \'varnishstat\' (not enough privileges?)')
+            return False
+
+        # 2. Output is parsable (list is not empty after regex findall)
+        is_parsable = self.rgx_all.findall(reply)
+        if not is_parsable:
+            self.error('Cant parse output...')
+            return False
+
+        # We need to find the right regex for backend parse
+        self.backend_list = self.rgx_bck[0].findall(reply)[::2]
+        if self.backend_list:
+            self.rgx_bck = self.rgx_bck[0]
+        else:
+            self.backend_list = self.rgx_bck[1].findall(reply)[::2]
+            self.rgx_bck = self.rgx_bck[1]
+
+        # We are about to start!
+        self.create_charts()
+
+        self.info('Plugin was started successfully')
+        return True
+     
+    def _get_raw_data(self):
+        try:
+            reply = Popen([self.varnish, '-1'], stdout=PIPE, stderr=PIPE, shell=False)
+        except OSError:
+            return None
+
+        raw_data = reply.communicate()[0]
+
+        if not raw_data:
+            return None
+
+        return raw_data
+
+    def _get_data(self):
+        """
+        Format data received from shell command
+        :return: dict
+        """
+        raw_data = self._get_raw_data()
+        data_all = self.rgx_all.findall(raw_data)
+        data_backend = self.rgx_bck.findall(raw_data)
+
+        if not data_all:
+            return None
+
+        # 1. ALL data from 'varnishstat -1'. t - type(MAIN, MEMPOOL etc)
+        to_netdata = {k: int(v) for t, k, v in data_all}
+        
+        # 2. ADD backend statistics
+        to_netdata.update({'_'.join([n, k]): int(v) for n, k, v in data_backend})
+
+        # 3. ADD additional keys to dict
+        # 3.1 Cache hit/miss/hitpass OVERALL in percent
+        cache_summary = sum([to_netdata.get('cache_hit', 0), to_netdata.get('cache_miss', 0),
+                             to_netdata.get('cache_hitpass', 0)])
+        to_netdata['cache_hit_perc'] = find_percent(to_netdata.get('cache_hit', 0), cache_summary, 10000)
+        to_netdata['cache_miss_perc'] = find_percent(to_netdata.get('cache_miss', 0), cache_summary, 10000)
+        to_netdata['cache_hitpass_perc'] = find_percent(to_netdata.get('cache_hitpass', 0), cache_summary, 10000)
+
+        # 3.2 Cache hit/miss/hitpass CURRENT in percent
+        if self.cache_prev:
+            cache_summary = sum([to_netdata.get('cache_hit', 0), to_netdata.get('cache_miss', 0),
+                                 to_netdata.get('cache_hitpass', 0)]) - sum(self.cache_prev)
+            to_netdata['cache_hit_cperc'] = find_percent(to_netdata.get('cache_hit', 0) - self.cache_prev[0], cache_summary, 10000)
+            to_netdata['cache_miss_cperc'] = find_percent(to_netdata.get('cache_miss', 0) - self.cache_prev[1], cache_summary, 10000)
+            to_netdata['cache_hitpass_cperc'] = find_percent(to_netdata.get('cache_hitpass', 0) - self.cache_prev[2], cache_summary, 10000)
+        else:
+            to_netdata['cache_hit_cperc'] = 0
+            to_netdata['cache_miss_cperc'] = 0
+            to_netdata['cache_hitpass_cperc'] = 0
+
+        self.cache_prev = [to_netdata.get('cache_hit', 0), to_netdata.get('cache_miss', 0), to_netdata.get('cache_hitpass', 0)]
+
+        # 3.3 Problems summary chart
+        for elem in ['backend_busy', 'backend_unhealthy', 'esi_errors', 'esi_warnings', 'losthdr', 'sess_drop', 'sc_pipe_overflow',
+                     'sess_fail', 'sess_pipe_overflow', 'threads_destroyed', 'threads_failed', 'threads_limited', 'thread_queue_len']:
+            if to_netdata.get(elem) is not None:
+                to_netdata[''.join([elem, '_b'])] = to_netdata.get(elem)
+
+        # Ready steady go!
+        return to_netdata
+
+    def create_charts(self):
+        # If 'all_charts' is true...ALL charts are displayed. If no only default + 'extra_charts'
+        #if self.configuration.get('all_charts'):
+        #    self.order = EXTRA_ORDER
+        #else:
+        #    try:
+        #        extra_charts = list(filter(lambda chart: chart in EXTRA_ORDER, self.extra_charts.split()))
+        #    except (AttributeError, NameError, ValueError):
+        #        self.error('Extra charts disabled.')
+        #        extra_charts = []
+    
+        self.order = ORDER[:]
+        #self.order.extend(extra_charts)
+
+        # Create static charts
+        #self.definitions = {chart: values for chart, values in CHARTS.items() if chart in self.order}
+        self.definitions = CHARTS
+ 
+        # Create dynamic backend charts
+        if self.backend_list:
+            for backend in self.backend_list:
+                self.order.insert(0, ''.join([backend[0], '_resp_stats']))
+                self.definitions.update({''.join([backend[0], '_resp_stats']): {
+                    'options': [None,
+                                '%s response statistics' % backend[0].capitalize(),
+                                "kilobit/s",
+                                'Backend response',
+                                'varnish.backend',
+                                'area'],
+                    'lines': [[''.join([backend[0], '_beresp_hdrbytes']),
+                               'header', 'incremental', 8, 1000],
+                              [''.join([backend[0], '_beresp_bodybytes']),
+                               'body', 'incremental', -8, 1000]]}})
+
+
+def find_percent(value1, value2, multiply):
+    # If value2 is 0 return 0
+    if not value2:
+        return 0
+    else:
+        return round(float(value1) / float(value2) * multiply)