#408 python-preference only-managed 3.13t
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Topics covered in this episode:

- **[GitHub action security: zizmor](https://nedbatchelder.com/blog/202410/github_action_security_zizmor.html?featured_on=pythonbytes))**

• Python is now the top language on GitHub)

• Python 3.13, what didn't make the headlines)

• PyCon US 2025)

• Extras

• Joke

Watch on YouTube)

About the show

Sponsored by:

• ScoutAPM) - Django Application Performance Monitoring

• Codeium) - Free AI Code Completion & Chat

Connect with the hosts

• Michael: @[email protected])

• Brian: @[email protected])

• Show: @[email protected])

Join us on YouTube at pythonbytes.fm/live) to be part of the audience. Usually Monday at 10am PT. Older video versions available there too.

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Brian #1: GitHub action security: zizmor)

• Article: Ned Batchelder

• zizmor: William Woodruff & others

• “a new tool to check your GitHub action workflows for security concerns.”

• Install with cargo or brew, then point it at workflow yml files.

• It reports security concerns.

Michael #2: Python is now the top language on GitHub)

• Thanks to Pat Decker for the heads up.

• A rapidly growing number of developers worldwide

• This suggests AI isn’t just helping more people learn to write code or build software faster—it’s also attracting and helping more people become developers. First-time open source contributors continue to show wide-scale interest in AI projects. But we aren’t seeing signs that AI has hurt open source with low-quality contributions.

• Python is now the most used language on GitHub as global open source activity continues to extend beyond traditional software development.

• The rise in Python usage correlates with large communities of people joining the open source community from across the STEM world rather than the traditional community of software developers.

• There’s a continued increase in first-time contributors to open source projects. 1.4 million new developers globally joined open source with a majority contributing to commercially backed and generative AI projects.

• Notably, we did not see a rise in rejected pull requests. This could indicate that quality remains high despite the influx of new contributors.

Brian #3: Python 3.13, what didn't make the headlines)

• Some pretty cool updates to pdb : the command line Python debugger

• multiline editing

• code completion

• pathlib has a bunch of performance updates

• python -m venv adds a .gitignore file that auto ignores the venv.

Michael #4: PyCon US 2025)

• Site is live with CFP and dates

• Health code) is finally reasonable: “Masks are Encouraged but not Required”

• PyCon US 2025 Dates

• Tutorials - May 14-15, 2025

• Sponsor Presentations - May 15, 2025

• Opening Reception - May 15, 2025

• Main Conference and Online - May 16-18, 2025

• Job Fair - May 18, 2025

• Sprints - May 19-May 22, 2025

Extras

Brian:

• Please publish and share more) - Jeff Triplett

Michael:

• pre-commit-uv)

• Just spoke with Sefanie Molin about pre-commit hooks on Talk Python)

• Curse you Omnivore)!

• We have moved to hetzner)

• Typora markdown app)

• free-threaded Python is now available via uv)

`uv self update
uv python install --python-preference only-managed 3.13t
`

Joke: Debugging char)