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# vim:fileencoding=utf-8:noet
from __future__ import (unicode_literals, division, absolute_import, print_function)
REMOVE_THIS_KEY = object()
def mergeargs(argvalue, remove=False):
if not argvalue:
return None
r = {}
for subval in argvalue:
mergedicts(r, dict([subval]), remove=remove)
return r
def _clear_special_values(d):
'''Remove REMOVE_THIS_KEY values from dictionary
'''
l = [d]
while l:
i = l.pop()
pops = []
for k, v in i.items():
if v is REMOVE_THIS_KEY:
pops.append(k)
elif isinstance(v, dict):
l.append(v)
for k in pops:
i.pop(k)
def mergedicts(d1, d2, remove=True):
'''Recursively merge two dictionaries
First dictionary is modified in-place.
'''
_setmerged(d1, d2)
for k in d2:
if k in d1 and isinstance(d1[k], dict) and isinstance(d2[k], dict):
mergedicts(d1[k], d2[k], remove)
elif remove and d2[k] is REMOVE_THIS_KEY:
d1.pop(k, None)
else:
if remove and isinstance(d2[k], dict):
_clear_special_values(d2[k])
d1[k] = d2[k]
def mergedefaults(d1, d2):
'''Recursively merge two dictionaries, keeping existing values
First dictionary is modified in-place.
'''
for k in d2:
if k in d1 and isinstance(d1[k], dict) and isinstance(d2[k], dict):
mergedefaults(d1[k], d2[k])
else:
d1.setdefault(k, d2[k])
def _setmerged(d1, d2):
if hasattr(d1, 'setmerged'):
d1.setmerged(d2)
def mergedicts_copy(d1, d2):
'''Recursively merge two dictionaries.
Dictionaries are not modified. Copying happens only if necessary. Assumes
that first dictionary supports .copy() method.
'''
ret = d1.copy()
_setmerged(ret, d2)
for k in d2:
if k in d1 and isinstance(d1[k], dict) and isinstance(d2[k], dict):
ret[k] = mergedicts_copy(d1[k], d2[k])
else:
ret[k] = d2[k]
return ret
def updated(d, *args, **kwargs):
'''Copy dictionary and update it with provided arguments
'''
d = d.copy()
d.update(*args, **kwargs)
return d
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