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#476 Common themes
Episode 476
Monday, 6 April, 2026

Topics covered in this episode: Migrating from mypy to ty: Lessons from FastAPI Oxyde ORM Typeshedded CPython docs Raw+DC Database Pattern: A Retrospective Extras Joke Watch on YouTube About the show Sponsored by us! Support our work through: Our courses at Talk Python Training The Complete pytest Course Patreon Supporters Connect with the hosts Michael: @mkennedy@fosstodon.org / @mkennedy.codes (bsky) Brian: @brianokken@fosstodon.org / @brianokken.bsky.social Show: @pythonbytes@fosstodon.org / @pythonbytes.fm (bsky) Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 11am 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: Migrating from mypy to ty: Lessons from FastAPI Tim Hopper I saw this post by Sebastián Ramírez about all of his projects switching to ty FastAPI, Typer, SQLModel, Asyncer, FastAPI CLI SqlModel is already ty only - mypy removed This signals that ty is ready to use Tim lists some steps to apply ty to your own projects Add ty alongside mypy Set error-on-warning = true Accept the double-ignore comments Pick a smaller project to cut over first Drop mypy when the noise exceeds the signalAdd ty alongside mypy Related anecdote: I had tried out ty with pytest-check in the past with difficulty Tried it again this morning, only a few areas where mypy was happy but ty reported issues At least one ty warning was a potential problem for people running pre-releases of pytest, Not really related: packaging.version.parse is awesome Michael #2: Oxyde ORM Oxyde ORM is a type-safe, Pydantic-centric asynchronous ORM with a high-performance Rust core. Note: Oxyde is a young project under active development. The API may evolve between minor versions. No sync wrappers or thread pools. Oxyde is async from the ground up Includes oxyde-admin Features Django-style API - Familiar Model.objects.filter() syntax Pydantic v2 models - Full validation, type hints, serialization Async-first - Built for modern async Python with asyncio Rust performance - SQL generation and execution in native Rust Multi-database - PostgreSQL, SQLite, MySQL support Transactions - transaction.atomic() context manager with savepoints Migrations - Django-style makemigrations and migrate CLI Brian #3: Typeshedded CPython docs Thanks emmatyping for the suggestion Documentation for Python with typeshed types Source: typeshedding_cpython_docs Michael #4: Raw+DC Database Pattern: A Retrospective A new design pattern I’m seeing gain traction in the software space: Raw+DC: The ORM pattern of 2026 I’ve had a chance to migrate three of my most important web app. Thrilled to report that yes, the web app is much faster using Raw+DC Plus, this was part of the journey to move from 1.3 GB memory usage to 0.45 GB (more on this next week) Extras Brian: Lean TDD 0.5 update Significant rewrite and focus Michael: pytest-just (for just command file testing), by Michael Booth Something going on with Encode httpx: Anyone know what's up with HTTPX? And forked starlette and uvicorn: Transfer of Uvicorn & Starlette mkdocs: The Slow Collapse of MkDocs django-rest-framework: Move to django commons? Certificates at Talk Python Training Joke: Neue Rich