#444 Begone Python of Yore! Podcast Por capa

#444 Begone Python of Yore!

#444 Begone Python of Yore!

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 Topics covered in this episode: Coverage.py regex pragmas* Python of Yore** nox-uv** A couple Django items*ExtrasJokeWatch on YouTube About the show Sponsored by DigitalOcean: pythonbytes.fm/digitalocean-gen-ai Use code DO4BYTES and get $200 in free credit Connect with the hosts Michael: @mkennedy@fosstodon.org / @mkennedy.codes (bsky)Brian: @brianokken@fosstodon.org / @brianokken.bsky.socialShow: @pythonbytes@fosstodon.org / @pythonbytes.fm (bsky) Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am PT. Older video versions available there too. Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it. Brian #1: Coverage.py regex pragmas Ned BatchelderThe regex implementation of how coverage.py recognizes pragmas is pretty amazing.It’s extensible through plugins covdefaults adds a bunch of default exclusions, and also platform- and version-specific comment syntaxes.coverage-conditional-plugin gives you a way to create comment syntaxes for entire files, for whether other packages are installed, and so on.A change from last year (as part of coverage.py 7.6 allows multiline regexes, which let’s us do things like: Exclude an entire file with \\A(?s:.*# pragma: exclude file.*)\\ZAllow start and stop delimiters with # no cover: start(?s:.*?)# no cover: stopExclude empty placeholder methods with ^\\s*(((async )?def .*?)?\\)(\\s*->.*?)?:\\s*)?\\.\\.\\.\\s*(#|$)See Ned’s article for explanations of these Michael #2: Python of Yore via MatthiasUse YORE: ... comments to highlight CPython version dependencies. # YORE: EOL 3.8: Replace block with line 4. if sys.version_info < (3, 9): from astunparse import unparse else: from ast import unparse Then check when they go out of support: $ yore check --eol-within '5 months' ./src/griffe/agents/nodes/_values.py:11: Python 3.8 will reach its End of Life within approx. 4 months Even fix them with fix . Michael #3: nox-uv via John HagenWhat nox-uv does is make it very simple to install uv extras and/or dependency groups into a nox session's virtual environment.The versions installed are constrained by uv's lockfile meaning that everything is deterministic and pinned.Dependency groups make it very easy to install only want is necessary for a session (e.g., only linting dependencies like Ruff, or main dependencies + mypy for type checking). Brian #4: A couple Django items Stop Using Django's squashmigrations: There's a Better Way Johnny MetzResetting migrations is sometimes the right thing.Overly simplified summary: delete migrations and start overdj-lite Adam HillUse SQLite in production with Django“Simplify deploying and maintaining production Django websites by using SQLite in production. dj-lite helps enable the best performance for SQLite for small to medium-sized projects. It requires Django 5.1+.” Extras Brian: Test & Code 237 with Sebastian Ramirez on FastAPI Cloudpythontest.com: pytest fixtures nuts and bolts - revisited Michael: New course: Just Enough Python for Data ScientistsMy live stream about uv is now on YouTubeCursor CLI: Built to help you ship, right from your terminal. Joke: Copy/Paste
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