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diff --git a/docs/python 2 sunset.txt b/docs/python 2 sunset.txt new file mode 100644 index 00000000..f7b7ee25 --- /dev/null +++ b/docs/python 2 sunset.txt @@ -0,0 +1,69 @@ +:orphan: + +Python 2 Sunset +=============== + +Since January 2020 and the release of Setuptools 45, Python 2 is no longer +supported by the most current release (`discussion +<https://github.com/pypa/setuptools/issues/1458>`_). Setuptools as a project +continues to support Python 2 with bugfixes and important features on +Setuptools 44.x. + +By design, most users will be unaffected by this change. That's because +Setuptools 45 declares its supported Python versions to exclude Python 2.7, +and installers such as pip 9 or later will honor this declaration and prevent +installation of Setuptools 45 or later in Python 2 environments. + +Users that do import any portion of Setuptools 45 or later on Python 2 are +directed to this documentation to provide guidance on how to work around the +issues. + +Workarounds +----------- + +The best recommendation is to avoid Python 2 and move to Python 3 where +possible. This project acknowledges that not all environments can drop Python +2 support, so provides other options. + +In less common scenarios, later versions of Setuptools can be installed on +unsupported Python versions. In these environments, the installer is advised +to first install ``setuptools<45`` to "pin Setuptools" to a compatible +version. + +- When using older versions of pip (before 9.0), the ``Requires-Python`` + directive is not honored and invalid versions can be installed. Users are + advised first to upgrade pip and retry or to pin Setuptools. Use ``pip + --version`` to determine the version of pip. +- When using ``easy_install``, ``Requires-Python`` is not honored and later + versions can be installed. In this case, users are advised to pin + Setuptools. This applies to ``setup.py install`` invocations as well, as + they use Setuptools under the hood. + +It's still not working +---------------------- + +If after trying the above steps, the Python environment still has incompatible +versions of Setuptools installed, here are some things to try. + +1. Uninstall and reinstall Setuptools. Run ``pip uninstall -y setuptools`` for + the relevant environment. Repeat until there is no Setuptools installed. + Then ``pip install setuptools``. +2. If possible, attempt to replicate the problem in a second environment + (virtual machine, friend's computer, etc). If the issue is isolated to just + one unique enviornment, first determine what is different about those + environments (or reinstall/reset the failing one to defaults). +3. End users who are not themselves the maintainers for the package they are + trying to install should contact the support channels for the relevant + application. Please be considerate of those projects by searching for + existing issues and following the latest guidance before reaching out for + support. When filing an issue, be sure to give as much detail as possible + to help the maintainers understand what factors led to the issue after + following their recommended guidance. +4. Reach out to your local support groups. There's a good chance someone + nearby has the expertise and willingness to help. +5. If all else fails, `file this template + <https://github.com/pypa/setuptools/issues/new?assignees=&labels=Python+2&template=setuptools-warns-about-python-2-incompatibility.md&title=Incompatible+install+in+(summarize+your+environment)>`_ + with Setuptools. Please complete the whole template, providing as much + detail about what factors led to the issue. Setuptools maintainers will + summarily close tickets filed without any meaningful detail or engagement + with the issue. |