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CI: drop the Python 3.9 MyPy job (not available on the new runner image) - #276
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GitHub's ubuntu-latest runners moved to Ubuntu 26.04, where setup-python
has no Python 3.9 ("The version '3.9' with architecture 'x64' was not
found"), so MyPy (3.9) fails on every PR and cancels the other versions'
jobs. pyproject.toml supports >3.10,<3.13, so the matrix becomes 3.10-3.12
and the unused mypy-3.9 hook is removed. fail-fast is off, so one version's
failure no longer cancels the rest.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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GitHub's
ubuntu-latestrunners moved to Ubuntu 26.04, andsetup-pythonthere has no Python 3.9:So MyPy (3.9) now fails on every PR, and it cancels the other versions' MyPy jobs with it. That happened on #275, for example.
Changes:
pyproject.tomlsupports>3.10,<3.13, so the MyPy matrix becomes 3.10, 3.11 and 3.12, and the unusedmypy-3.9hook is removed.fail-fast: false, so one version's failure no longer cancels the others.The pre-commit job is unchanged.
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