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Remove upper constraint on Python < 4 #239
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It causes problems for downstream dependents, even indirectly, specially
for Poetry. Most recently:
```
Because my-package depends on rsa (4.7) which requires Python >=3.5, <4, version solving failed.
• Check your dependencies Python requirement: The Python requirement can be specified via the `python` or `markers` properties
For rsa, a possible solution would be to set the `python` property to ">=3.8,<4"
https://python-poetry.org/docs/dependency-specification/#python-restricted-dependencies,
https://python-poetry.org/docs/dependency-specification/#using-environment-markers
```
From the comments in the [Discourse](https://discuss.python.org) by Core
developers and SC members, there probably won't a Python 4 so I think
it's fine to remove this constraint.
hugovk
approved these changes
Feb 28, 2025
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From the comments in the Discourse by Core developers and SC members, there probably won't be a Python 4 so I think it's fine to remove this constraint.
Agreed, see also:
- https://www.techrepublic.com/article/programming-languages-why-python-4-0-will-probably-never-arrive-according-to-its-creator/
- https://web.archive.org/web/20220906155615/https://twitter.com/gvanrossum/status/1306082472443084801
- https://discuss.python.org/t/python-3-13-alpha-1-contains-breaking-changes-whats-the-plan/37490/11
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It causes problems for downstream dependents, even indirectly, specially
for Poetry. Most recently:
From the comments in the Discourse by Core developers and SC members, there probably won't be a Python 4 so I think it's fine to remove this constraint.