Backport of the Python 3.9 graphlib module for older Python versions.
Github: https://github.com/mariushelf/graphlib_backport
This backport currently supports Python 3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12 and pypy3 (tested with pypy3.6, 3.7, 3.8 and 3.9).
Support for Python 3.6 and 3.7 is somewhat experimental and due to be dropped because of the end of support for these old versions.
pip install graphlib_backport
It is recommended to limit installation of this package to version of Python <3.9 and use the original implementation for Python >=3.9.
For example in a poetry pyproject.toml this can be done
by specifying the dependency as a
Python restricted dependency:
[tool.poetry.dependencies]
graphlib_backport = {version="^1.0.0", python="<3.9"}
The package works the very same way as the original package. Here's the documentation.
Contributions are welcome! See CONTRIBUTING.
The sourcecode is hosted on github. To develop on this package, just clone it, work on it and submit a pull request.
For testing against different Python versions, tox is required.
To download the latest original sourcecode into the repository, there is a make target:
make download_sourcecode
Warning: This overwrites the code in this repo. By default it uses the tag v3.9.0,
but you can overwrite that with a tag environment variable.
As simple as running tox on the command line.
The executables for all python versions must be in the path, e.g,
python3.6, ..., python3.9, pypy3.
You can install them with pyenv.
Create a new tag of the form x.y.z (no leading "v"),
and create a new release on Github.
This will automatically publish the package to PyPI.
Make sure that the version in pyproject.toml exactly matches the tag,
otherwise the release will fail.
See CHANGELOG.md
I did not create this code -- I only repackaged it so it can be pip-installed into older versions of Python.
So all thanks go to the original contributors of the original sourcecode.
Copyright © 2001-2023 Python Software Foundation; All Rights Reserved
Changes to the sourcecode and the tests: replace incompatible code
(e.g., the := walrus operator) with constructions compatible to
earlier versions of Python, and make the tests pass on all supported
versions.