loop over python versions in github actions

[zkurtz]

Here is what I did and it seems to work. But is that really the recommended way? It feels a bit hacky to overwrite .python-version. FWIW I'd appreciate any other feedback on that workflow config. I'm trying to set up uv with a few repos and would like to get my setup right.

[samypr100]

👋 I believe you can use UV_PYTHON instead

[zkurtz]

Seems to be working:

    - name: Set the python version for UV
      run: echo "UV_PYTHON=${{ matrix.python-version }}" >> $GITHUB_ENV

[zanieb]

I'd be happy to review a pull request adding documentation if needed. There's a bit at http://docs.astral.sh/uv/guides/integration/github/#setting-up-python but this sounds different.

[zkurtz]

Although #9376 (comment) seems to be working, I'm still not clear if that's considered a recommendable/canonical approach. From the docs you linked ^^, there is also this option

      - name: Set up Python ${{ matrix.python-version }}
        run: uv python install ${{ matrix.python-version }}

but it's not obvious to me whether the python version here specifically overrides the python version that would be used by subsequent uv run commands, which should obey the .python-version file regardless of which other versions of python happen to be available on the system

[zanieb]

Yeah uv run would respect the .python-version file and ignore the installed version

[zkurtz]

#9454