Simon Willison’s Weblog

Subscribe

3rd December 2025

None
TIL Dependency groups and uv run — I've adopted a new (to me) pattern for my Python projects to make them easier to hack on using `uv run`. I'm using a [PEP 735 dependency group](https://peps.python.org/pep-0735/) called `dev` to declare my development dependencies - in particular `pytest` - such that running `uv run pytest` executes the tests for my project without me having to even think about setting up a virtual environment first.
Posted 3rd December 2025 at 4:55 am

Recent articles

This is a beat by Simon Willison, posted on 3rd December 2025.

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe