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color:white

title:practicalities

fa-icon:pencil

id:bar

Add note here to explain that this does_not_ prevent_nor_ discourage library

author to release 2 version of their software one Python 3 only and the other

python 2.

We do not discourage authors to release software on Python 2. While this guide

is mostly written with the assumption that software are going to stop Python 2

support, it does perfectly apply to a package that wish to not support Python 3,

or is stopping support for any minor version.

This page gather information and links to resources allowing to release a

library that stop supporting an older version of Python without causing too

much disruption for users who haven't upgraded to this new version.

Wether you are a user, or a developer, being aware of the issue listed here, at

Whether you are a user, or a developer, being aware of the issue listed here, at

least the main points should ease lots of the pain.

- As maintainer use`setup(..., python_requires='>=3.4')` new option.

- do use`pip install [-e] .` and do**not** invoke`setup.py` directly.

-**Fail** early at**install time** if on Python 2.

- We are giving a talk at PyCon 2017 (likely recorded), add link here.

We are thus collecting a list of things to be aware of for when transitioning that

are less obvious. For example : as a developer, how to make sure that

your package manager like pip does not upgrade your libraries to incompatible

versions on Python 2. Check[our

repository](https://github.com/python3statement/python3statement.github.io) for

more information.

versions on Python 2. See the[Practicality Page](/practicalities/) for

informations and Check[our

repository](https://github.com/python3statement/python3statement.github.io) to

contribute.

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