Charlie Marsh returns to Pybites to introduce ty —Astral’s bold new take on Python type checking. Built from the ground up for speed and developer experience, ty is both a command-line tool and language server, powered by Rust's Salsa framework.

We dive into how it enables lightning-fast incremental analysis, smarter diagnostics inspired by Rust, and a reimagined type-checking workflow for modern Python projects. Charlie also shares how Astral is tackling broader ecosystem challenges alongside Meta and NVIDIA.

Curious? Just run 'uv x ty' and join the future of Python type checking.

For more info check out the following:

Notes & Blog Posts: https://notes.crmarsh.com/

LinkedIn: https://www.linkedin.com/in/marshcharles/

GitHub: https://github.com/charliermarsh

X: https://x.com/charliermarsh

GitHub Repo: https://github.com/astral-sh/ty

Explaining rust-analyzer (lectures): https://www.youtube.com/playlist?list=PLhb66M_x9UmrqXhQuIpWC5VgTdrGxMx3y

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