Drop support for Python 3.10 (around January/April 2027)

Python 3.10 is expected to reach its end-of-life phase in October 2026 (PEP 619). We will remove support in two steps, approximately three and six months after it reached EOL.

How to remove support

Expected January 2027

• Update the version in README.md.
• Update various fields in pyproject.toml.
• Remove 3.10 from CI and test scripts.
• Update stubtest allow lists. Also check whether items can be moved to the common allow lists.
• Remove requires-python >= 3.11 and python-version >= 3.11 from METADATA.toml.
• Remove the version suffix from regression tests ending with -py311.py.
• Remove tomli from requirements-tests.txt.

Expected April 2027

• Remove 3.10 exclusive branches from stubs.
  • Switch EnumType/EnumMeta names in stdlib/enum.pyi, making EnumType the "real" name
• Remove obsolete stdlib modules (see VERSIONS).
  • binhex
  • distutils.command.bdist_msi
• Replace typing_extensions imports.
  • TypeVarTuple
  • Required/NotRequired
  • Self
  • LiteralString
  • dataclass_transform
• Update "Supported type system features" section in CONTRIBUTING.md as necessary.

(Please amend as necessary.)

Commencez par la checklist de janvier 2027 dans README.md, pyproject.toml, la CI et les scripts de test, les listes d’autorisation de stubtest, METADATA.toml, les tests de régression et requirements-tests.txt. Examinez ensuite la checklist d’avril dans stdlib/enum.pyi, VERSIONS, les stubs concernés et CONTRIBUTING.md. La tâche est terminée lorsque la prise en charge de Python 3.10 est supprimée dans les deux étapes et que les tests et métadonnées concernés sont mis à jour.