Error: using `tox` on `Windows`

[berthetclement]

Hi all and thanks for your work !

I'm using astral-sh/setup-uv@v7 to run test/check with `pytest/ruff/mypy on my lib Python.

I have an issue with windows-latest, i don't know why this is running tox with default Python version :

Caution

Using Python 3.9.13 environment at: .tox\type

Find below more details :

type: venv> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe venv -p D:\a\_temp\uv-tool-dir\tox\Scripts\python.exe --allow-existing --python-preference system D:\a\antares_data_collection\antares_data_collection\.tox\type
type: install_deps> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe pip install mypy pandas-stubs
.pkg: venv> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe venv -p D:\a\_temp\uv-tool-dir\tox\Scripts\python.exe --allow-existing --python-preference system D:\a\antares_data_collection\antares_data_collection\.tox\.pkg
.pkg: install_requires> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe pip install setuptools>=61.0
.pkg: _optional_hooks> python D:\a\_temp\uv-tool-dir\tox\lib\site-packages\pyproject_api\_backend.py True setuptools.build_meta
.pkg: get_requires_for_build_sdist> python D:\a\_temp\uv-tool-dir\tox\lib\site-packages\pyproject_api\_backend.py True setuptools.build_meta
.pkg: freeze> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe --color never pip freeze
.pkg: setuptools==80.9.0
.pkg: build_sdist> python D:\a\_temp\uv-tool-dir\tox\lib\site-packages\pyproject_api\_backend.py True setuptools.build_meta
type: install_package_deps> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe pip install pandas
type: install_package> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe pip install --reinstall --no-deps antares-data-collection@D:\a\antares_data_collection\antares_data_collection\.tox\.tmp\package\1\antares_data_collection-0.1.0.tar.gz
Using Python 3.9.13 environment at: .tox\type
type: exit 1 (0.16 seconds) D:\a\antares_data_collection\antares_data_collection> D:\a\_temp\uv-tool-dir\tox\Scripts\uv.exe pip install --reinstall --no-deps antares-data-collection@D:\a\antares_data_collection\antares_data_collection\.tox\.tmp\package\1\antares_data_collection-0.1.0.tar.gz pid=8484
  � No solution found when resolving dependencies:
  \u[25](https://github.com/AntaresSimulatorTeam/antares_data_collection/actions/runs/19537901087/job/55936414246#step:6:26)70\u2500\u25b6 Because the current Python version (3.9.13) does not satisfy
      Python>=3.11 and antares-data-collection==0.1.0 depends on Python>=3.11,
      we can conclude that antares-data-collection==0.1.0 cannot be used.
      And because only antares-data-collection==0.1.0 is available and you
      require antares-data-collection, we can conclude that your requirements
      are unsatisfiable.
type: FAIL ! in 4.92 seconds

I found a solution to force version of Python to 3.11 (cause my lib need requires-python = ">=3.11").

Below, .yml file who solve issue :

name: tests+lint+type

on:
  push:
    branches: ["main"]
  pull_request:

jobs:
  test:
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        # tox-env: ["py310", "py311", "py312"] => config used with tox.ini

      fail-fast: false

    runs-on: ${{ matrix.os }}

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Install uv
        uses: astral-sh/setup-uv@v7
        with:
          enable-cache: true
          python-version: ${{ runner.os == 'Windows' && '3.11' || null }}

      - name: Install tox + tox-uv
        run: uv tool install tox --with tox-uv

      - name: Install the project
        run: uv sync --locked --all-extras --dev

      - name: Run tox
        # use all env tox defined in tox.ini
        run: tox

I have no issue with ubuntu-latest, macos-latest, this is a "normal bug" with Windows ?

For more details about the job in Error :

• https://github.com/AntaresSimulatorTeam/antares_data_collection/actions/runs/19537901087/job/55936414246

[eifinger]

Can you share the contents of D:\a\antares_data_collection\antares_data_collection\.tox\type?

[eifinger]

Do you have a.python-version file in your repo root?
What is your requires-python in pyproject.toml set to?

[berthetclement]

Can you share the contents of D:\a\antares_data_collection\antares_data_collection\.tox\type?

Yes, localy :

ls -a .tox/type/
.  ..  bin  CACHEDIR.TAG  .gitignore  lib  lib64  .lock  log  pyvenv.cfg  tmp  .tox-info.json

ls -a .tox/type/bin/
.  ..  activate  activate.bat  activate.csh  activate.fish  activate.nu  activate.ps1  activate_this.py  deactivate.bat  dmypy  f2py  mypy  mypyc  numpy-config  pydoc.bat  python  python3  python3.11  stubgen  stubtest

Do you have a.python-version file in your repo root? What is your requires-python in pyproject.toml set to?

Sure i have this file with:

• 3.11

In my last post :

I found a solution to force version of Python to 3.11 (cause my lib need requires-python = ">=3.11").

I hope that can help you, THX for your reply !

[eifinger]

I am not a tox expert so this might take some back and forth.

Can you please determine the python version of D:\a\_temp\uv-tool-dir\tox\Scripts\python.exe

So something like:

name: debug uv/tox on windows

on:
  workflow_dispatch:

jobs:
  test:
    runs-on: windows-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Install uv
        uses: astral-sh/setup-uv@v7

      - name: Install tox + tox-uv
        run: uv tool install tox --with tox-uv

      - name: Determine python version tox is using
        run: D:\a\_temp\uv-tool-dir\tox\Scripts\python.exe --version

[berthetclement]

Using Python 3.9.13 environment at: .tox\type

I think version used is the version displayed in log (first post).

[eifinger]

You think or you are are sure?

[berthetclement]

hehe sure i'm not 💯 but this is the result :

https://github.com/AntaresSimulatorTeam/antares_data_collection/actions/runs/19542609369/job/55952806867?pr=2

Run D:\a\_temp\uv-tool-dir\tox\Scripts\python.exe --version
  D:\a\_temp\uv-tool-dir\tox\Scripts\python.exe --version
  shell: C:\Program Files\PowerShell\7\pwsh.EXE -command ". '{0}'"
  env:
    UV_TOOL_BIN_DIR: D:\a\_temp\uv-tool-bin-dir
    UV_TOOL_DIR: D:\a\_temp\uv-tool-dir
    UV_PYTHON_INSTALL_DIR: D:\a\_temp\uv-python-dir
    UV_CACHE_DIR: D:\a\_temp\setup-uv-cache
Python 3.9.13

[eifinger]

I cannot find anything that would indicate this is an error with uv or setup-uv. Can you please instead create an issue in https://github.com/tox-dev/tox-uv ?

[berthetclement]

Ok thanks for your reply !

I will do this