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Python 3.15.0 added to GitHub Actions python-versions

Original: Python 3.15.0 added to actions/python-versions https://simonwillison.net/2026/Oct/10/python-actions/ # Python # OpenSour

Python 3.15.0 has been added to the actions/python-versions repository, making the new release available for use in GitHub Actions workflows. Simon Willison noted the update, which means developers can now run CI builds against the latest Python version without extra setup steps. The news is being shared among developers tracking the newest Python release.

Why now: Python 3.15.0 is newly released and developers are updating their CI pipelines to test against it

Python actions/python-versions GitHub Actions Simon Willison

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Evidence

Python 3.15.0 added to actions/python-versions https://simonwillison.net/2026/Oct/10/python-actions/ # Python # OpenSource # DevTools · simon_willison@robot.villas · 2

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