Support for Python 3.13 on Windows

[davidbrochart]

I'm trying to publish wheeld for pycrdt on Windows for Python 3.13 and I get an error suggesting that Python 3.13 is not found

🐍 Found CPython 3.8 at C:\hostedtoolcache\windows\Python\3.8.10\x64\python.exe, CPython 3.9 at C:\hostedtoolcache\windows\Python\3.9.13\x64\python.exe, CPython 3.10 at C:\hostedtoolcache\windows\Python\3.10.11\x64\python.exe, CPython 3.11 at C:\hostedtoolcache\windows\Python\3.11.9\x64\python.exe, CPython 3.12 at C:\hostedtoolcache\windows\Python\3.12.6\x64\python.exe, CPython 3.13
...
  = note: LINK : fatal error LNK1181: cannot open input file 'python313.lib'

I'm not sure I should report here, or if I'm doing something wrong on my side?

[messense]

Python 3.13 isn't installed by default in Actions runner yet: https://github.com/actions/runner-images/blob/main/images/windows/Windows2022-Readme.md#python

You can install it before building using setup-python action manually for the moment.

[JacobCallahan]

@messense Perhaps I'm doing something wrong, but even after setup-python explicitly adds python 3.13 for all my platforms, maturin doesn't seem to find it and stops at python 3.12. Some links for reference:

Linux x86_64: https://github.com/JacobCallahan/Hussh/actions/runs/11261961543/job/31316640293?pr=19
Run summary view: https://github.com/JacobCallahan/Hussh/actions/runs/11261961543?pr=19
PR with workflow changes: JacobCallahan/Hussh#19

Thanks for your time!

[messense]

@JacobCallahan See PyO3/maturin#2248

for now you can pass the list of python versions manually via -i, for example https://github.com/jupyter-server/pycrdt/actions/runs/11251137381/workflow#L27

[JacobCallahan]

@messense very nice! Do you know how soon that will be available in the action, if soon, then I might just hold off instead of doing a temporary workaround.

[JacobCallahan]

@messense i tried using maturin-action:main for a run to see if the change you linked would help, but it still doesn't look to have detected py3.13

https://github.com/JacobCallahan/Hussh/actions/runs/11308556582/job/31451536529?pr=19

[ddelange]

fyi adding setup-python doesn't fix failing CI on win i686 for 3.13:
https://github.com/oconnor663/blake3-py/actions/runs/11994284643

workflow file: https://github.com/oconnor663/blake3-py/blob/0440f6dffad73a0001f0472864495b8889dd0358/.github/workflows/dists.yml

[ddelange]

fwiw, we got python 3.13 to work on windows: oconnor663/blake3-py#46

    - uses: actions/setup-python@v5
      with:
        # pin to the latest supported python version
        python-version: "3.13"
        # x86 python needs to be available for the win32 wheel
        architecture: ${{ ( matrix.os == 'windows-latest' && matrix.target == 'i686' ) && 'x86' || null }}

    - uses: PyO3/maturin-action@v1
      with:
        ...

[ddelange]

Reporting back here on my last comment: we got python 3.13t to work on windows: oconnor663/blake3-py#47 and then oconnor663/blake3-py#50

final workflow: dists.yml

for 3.13t (free-threaded python) support, 3.13t needs to be explicitly installed on the runner. to be robust (workflow independent of the cached python versions in the runner images) we install all python versions that we're linking against (including 3.13t using actions/setup-python#973 (comment))

[messense]

Yeah, there are still some cross compilation bugs in pyo3 I've submitted fixes recently: PyO3/pyo3#4808