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

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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

#476 Common themes

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