Python 3.13

[sgillies]

There are 2 different groups of tasks

Python 3.13 support in CI runners

• Check GHA Windows
• Check GHA Mac
• Check GHA Linux
• Check Cirrus Mac

Python 3.13 support in wheel building tools

• Check multi-build
• Check cibuildwheel

Conclusions:

• https://github.com/multi-build/multibuild/blob/devel/osx_utils.sh#L24 lacks support for downloading Python 3.13.
• My custom fork of auditwheel needs to be synced with main project, should do this before 1.10.0rc1 anyway.
• Lack of numpy wheels for 3.13 is a blocker on Windows and other platforms surely.

[EwoutH]

#48 might help, it will automate updating GitHub Actions, including updating cibuildwheel to the latest version which support Python 3.13.

[EwoutH]

• https://github.com/multi-build/multibuild/blob/devel/osx_utils.sh#L24 lacks support for downloading Python 3.13.

Opened PRs upstream, last year it was merged within the day!

• Add Python 3.13 release candidate 1 multi-build/multibuild#522
• Add Python 3.13 release candidate 1 multi-build/docker-images#47

Lack of numpy wheels for 3.13 is a blocker on Windows and other platforms surely.

NumPy has Python 3.13 wheels out for NumPy 2.1.0!

[mattip]

Lack of numpy wheels for 3.13 is a blocker on Windows

You can get pre-release wheels at https://anaconda.org/scientific-python-nightly-wheels/numpy

[EwoutH]

They're are also right on PyPI: https://pypi.org/project/numpy/#files

[mattip]

sorry, I meant for next year's 3.14 update effort, the pre-release wheels will be on the staging site before they are released to PyPI.

[EwoutH]

Yes that's a good point!

[sgillies]

I just saw this https://github.com/multi-build/multibuild/blob/devel/osx_utils.sh#L25 @EwoutH. Nice work!

[sgillies]

In conclusion: we can continue with multibuild for the remainder of the 1.10.0 release plan and migrate to cibuildwheel after.