tox-py

Unmaintained (2022-12-08)

With the release of tox 4, this package is no longer necessary, and so is not being maintained. You can instead use tox 4’s -f option - see below.

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Adds the --py flag to tox to run environments matching a given Python interpreter.

Installation

Use pip:

python -m pip install tox-py

Python 3.7 to 3.11 supported.

Only tox 3 is supported.

On tox 4, you can use the new -f factor option__ to select environments by Python version:

$ tox -f py310

On GitHub Actions, you can use -f with your matrix python version like so:

jobs:
  tests:
    name: Python ${{ matrix.python-version }}

    strategy:
      matrix:
        python-version:
        - 3.7
        - 3.8
        - 3.9
        - '3.10'
        - '3.11'

    steps:
    - ...

    - name: Run tox targets for ${{ matrix.python-version }}
      run: tox run -f py$(echo ${{ matrix.python-version }} | tr -d .)

---

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Usage

After installation, the plugin will be automatically picked up by tox. It adds one argument: --py, which takes the version to filter environments against. The version can be specified either as a tox.ini-style dotless version number, or the special string current for the version of Python that tox is running under.

For example, to run all Python 3.9 environments:

tox --py 39

Or to run all environments matching the version of Python that tox is running under:

tox --py current

This makes configuring CI really easy: configure your CI to trigger each Python version in parallel, running tox --py current.