PyYAML

A full-featured YAML processing framework for Python

Installation

To install, type python setup.py install.

By default, the setup.py script checks whether LibYAML is installed and if so, builds and installs LibYAML bindings. To skip the check and force installation of LibYAML bindings, use the option --with-libyaml: python setup.py --with-libyaml install. To disable the check and skip building and installing LibYAML bindings, use --without-libyaml: python setup.py --without-libyaml install.

When LibYAML bindings are installed, you may use fast LibYAML-based parser and emitter as follows:

>>> yaml.load(stream, Loader=yaml.CLoader)
>>> yaml.dump(data, Dumper=yaml.CDumper)

If you don't trust the input YAML stream, you should use:

>>> yaml.safe_load(stream)

Testing

PyYAML includes a comprehensive test suite.

To run the complete local test suite, type:

make test

This creates a local Python environment, runs the pure Python tests, builds a local copy of LibYAML, and then runs the LibYAML extension tests. The local LibYAML build is pinned by LIBYAML-REF, which defaults to 0.2.5.

To run only one test mode:

make test-python
make test-libyaml

To test with a specific Python version:

make test PYTHON-VERSION=3.13.5

Further Information

• For more information, check the PyYAML homepage.

• PyYAML tutorial and reference.

• Discuss PyYAML with the maintainers on Matrix at https://matrix.to/#/#pyyaml:yaml.io or IRC #pyyaml irc.libera.chat

• Submit bug reports and feature requests to the PyYAML bug tracker.

License

The PyYAML module was written by Kirill Simonov xi@resolvent.net. It is currently maintained by the YAML and Python communities.

PyYAML is released under the MIT license.

See the file LICENSE for more details.