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Type: Bug
Resolution: Fixed
Priority: Not Evaluated
Fix Version/s: 6.5.0, 6.6.0
Affects Version/s: 6.5.0
Component/s: PySide
Labels:
None
Environment:

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Python 3.9
Windows 10
April 6th wheels:
https://download.qt.io/snapshots/ci/pyside/dev/f6d5548a235aa2617a8b286a6523dc53d6da7406/split_wheels/shiboken6-6.5.0a1.dev1680694534-cp37-abi3-win_amd64.whl
https://download.qt.io/snapshots/ci/pyside/dev/f6d5548a235aa2617a8b286a6523dc53d6da7406/split_wheels/PySide6_Essentials-6.5.0a1.dev1680694534-cp37-abi3-win_amd64.whl

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Python 3.9 Windows 10 April 6th wheels: https://download.qt.io/snapshots/ci/pyside/dev/f6d5548a235aa2617a8b286a6523dc53d6da7406/split_wheels/shiboken6-6.5.0a1.dev1680694534-cp37-abi3-win_amd64.whl https://download.qt.io/snapshots/ci/pyside/dev/f6d5548a235aa2617a8b286a6523dc53d6da7406/split_wheels/PySide6_Essentials-6.5.0a1.dev1680694534-cp37-abi3-win_amd64.whl

Commits:
15b964d00 (dev), 165232a09 (6.5), 1ae272c38 (dev), f32c87d71 (6.7), 2d18d70ea (tqtc/lts-6.5)

`types.NoneType` is an unknown import in Python 3.9 and below.

There's a few ways to handle this while keeping Python 3.9 support:
1. Use `_typeshed.NoneType`. typeshed is bundled with type checkers (mypy, pyright, pytype, pycharm) and so should be available. This overload is also marked as stable.
2. Implement your own overload like typeshed does: https://github.com/python/typeshed/blob/1c0500a57050815102c702efd053e09770a5ee88/stdlib/_typeshed/__init__.pyi#L270-L277
3. Use `type[None]` instead.