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version: 0.2
text: md
pdf: false
--- |
# Installing
Make sure you have a recent version of `pip` and `setuptools` installed.
The later needs environment marker support (`setuptools>=20.6.8`) and
that is e.g. bundled with Python 3.4.6 but not with 3.4.4. It is
probably best to do:
pip install -U pip setuptools wheel
in your environment (`virtualenv`, (Docker) container, etc) before
installing `ruamel.yaml`.
`ruamel.yaml` itself should be installed from [PyPI]() using:
pip install ruamel.yaml
If you want to process jinja2/YAML templates (which are not valid YAML
with the default jinja2 markers), do `pip install ruamel.yaml[jinja2]`
(you might need to quote the last argument because of the `[]`)
There also is a commandline utility `yaml` available after installing:
pip install ruamel.yaml.cmd
that allows for round-trip testing/re-indenting and conversion of YAML
files (JSON,INI,HTML tables)
## Optional requirements
If you have the the header files for your Python executables installed
then you can use the (non-roundtrip), but faster, C loader and emitter.
On Debian systems you should use:
sudo apt-get install python3-dev
you can leave out `python3-dev` if you don\'t use python3
For CentOS (7) based systems you should do:
sudo yum install python-devel
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