fix: Remove '<4' from python_requires in packaging guide #850
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As discussed in https://discuss.python.org/t/use-of-less-than-next-major-version-e-g-4-in-python-requires-setup-py/1066 and other places there can be some side effects of adding `<4` to a library's python_requires. This PR removes it, as requested in the discuss.python question. The section above the lines discussed in the topic that uses compatible release syntax is also removed given that `~=3.3` also enforces `<4`. Additional references of problems known to Matthew for posterity: * Twitter threads: - https://twitter.com/HEPfeickert/status/1362170933658738701 - https://twitter.com/nicholdav/status/1366978826790666240 * GitHub Issues: - python-poetry/poetry#3747
henryiii
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Mar 3, 2021
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Keep in mind, unlike for libraries (where honestly this is still a poor idea for a general library pin), using Requires-Python causes pip to scroll back through history to find the first matching version that does not have a Requires-Python slot that does not include the current Python. This is never correct for a "future" version, but can only be used for the use case it was designed for - dropping a version that you used to support.
pfmoore
approved these changes
Mar 3, 2021
webknjaz
approved these changes
Mar 3, 2021
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For posterity, related to: nedbat/coveragepy#1021 |
This was referenced Aug 26, 2022
This was referenced Jan 18, 2023
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As discussed in the discuss.python topic "Use of “less-than next-major-version” (e.g.,
<4) inpython_requires(setup.py)" and other places there can be some side effects of adding<4to a library'spython_requires. This PR removes it, as requested by @njsmith in the discuss.python topic.The section above the lines discussed in the topic that uses compatible release syntax is also removed given that
~=3.3also enforces<4.My apologies in advance if this was already discussed in an Issue and decided against (I didn't see any when I scrolled through) or in a previously closed PR. Please let me know if you'd like me to open an Issue to discuss this PR topic instead.
Tagging @pfmoore and @njsmith as they were the devs in the discuss.python topic and @NickleDave and @henryiii as they might be interested in this as well.