Today, we’re announcing the preview release of ty, an extremely fast type checker and language server for Python, written in Rust.

In early testing, it's 10x, 50x, even 100x faster than existing type checkers. (We've seen >600x speed-ups over Mypy in some real-world projects.)

With uv (astral) and Zed, it is pretty easy to get set up to work on an existing Python project:

1. Clone the repo
2. `uv sync` to install deps in a .venv
3. Select the .venv in Zed's toolchain selector

We have plans to further improve our support of Python. Stay tuned.

The 2025 Ruff style guide includes formatting for f-string interpolated expressions, automatic joining of single-line implicitly concatenated strings, improved formatting for multiline `assert` statements, and more astral.sh/blog/ruff-v0...

python-build-standalone has exploded in popularity, with over 70M downloads all-time.

But what is a "standalone" Python build?

It wasn't obvious to me at first! Initially, I didn't understand what problem was being solved or why it mattered...

uv now ships with dedicated documentation for PyTorch