The folks over at Astral have made some big-time impacts in the Python space with uv and ruff. They are back with another amazing project named ty. You may have known it as Red-Knot. But it's coming up on release time for the first version and with the release it comes with a new official name: ty. We have Charlie Marsh and Carl Meyer on the show to tell us all about this new project. 
 
Episode sponsors 
 
<a href='https://talkpython.fm/connect-cloud'>Posit</a>
<a href='https://talkpython.fm/auth0'>Auth0</a>
<a href='https://talkpython.fm/training'>Talk Python Courses</a> 
 
<h2 class="links-heading">Links from the show</h2>
<div>Talk Python's Rock Solid Python: Type Hints & Modern Tools (Pydantic, FastAPI, and More) Course: <a href="https://training.talkpython.fm/courses/python-type-hint-course-with-hands-on-examples" target="_blank" >training.talkpython.fm</a> 
 
Charlie Marsh on Twitter: <a href="https://twitter.com/charliermarsh?featured_on=talkpython" target="_blank" >@charliermarsh</a> 
Charlie Marsh on Mastodon: <a href="https://hachyderm.io/@charliermarsh?featured_on=talkpython" target="_blank" >@charliermarsh</a> 
 
Carl Meyer: <a href="https://twitter.com/carljm/?featured_on=talkpython" target="_blank" >@carljm</a> 
 
ty on Github: <a href="https://github.com/astral-sh/ty?featured_on=talkpython" target="_blank" >github.com/astral-sh/ty</a> 
A Very Early Play with Astral’s Red Knot Static Type Checker: <a href="https://app.daily.dev/posts/a-very-early-play-with-astral-s-red-knot-static-type-checker-wnhcuf0lx?featured_on=talkpython" target="_blank" >app.daily.dev</a> 
Will Red Knot be a drop-in replacement for mypy or pyright?: <a href="https://github.com/astral-sh/ruff/discussions/15149?featured_on=talkpython" target="_blank" >github.com</a> 
Hacker News Announcement: <a href="https://news.ycombinator.com/item?id=42868576&featured_on=talkpython" target="_blank" >news.ycombinator.com</a> 
Early Explorations of Astral’s Red Knot Type Checker: <a href="https://pydevtools.com/blog/early-explorations-of-astrals-red-knot-type-checker/?featured_on=talkpython" target="_blank" >pydevtools.com</a> 
Astral's Blog: <a href="https://astral.sh/blog?featured_on=talkpython" target="_blank" >astral.sh</a> 
Rust Analyzer Salsa Docs: <a href="https://docs.rs/rust-analyzer-salsa/latest/salsa/?featured_on=talkpython" target="_blank" >docs.rs</a> 
Ruff Open Issues (label: red-knot): <a href="https://github.com/astral-sh/ruff/issues?q=is%3Aissue%20state%3Aopen%20label%3Ared-knot&featured_on=talkpython" target="_blank" >github.com</a> 
Ruff Types: <a href="https://types.ruff.rs/?featured_on=talkpython" target="_blank" >types.ruff.rs</a> 
Ruff Docs (Astral): <a href="https://docs.astral.sh/ruff/?featured_on=talkpython" target="_blank" >docs.astral.sh</a> 
uv Repository: <a href="https://github.com/astral-sh/uv?featured_on=talkpython" target="_blank" >github.com</a> 
Watch this episode on YouTube: <a href="https://www.youtube.com/watch?v=XVwpL_cAvrw" target="_blank" >youtube.com</a> 
Episode transcripts: <a href="https://talkpython.fm/episodes/transcript/506/ty-astrals-new-type-checker-formerly-red-knot" target="_blank" >talkpython.fm</a> 
 
--- Stay in touch with us --- 
Subscribe to Talk Python on YouTube: <a href="https://talkpython.fm/youtube" target="_blank" >youtube.com</a> 
Talk Python on Bluesky: <a href="https://bsky.app/profile/talkpython.fm" target="_blank" >@talkpython.fm at bsky.app</a> 
Talk Python on Mastodon: <a href="https://fosstodon.org/web/@talkpython" target="_blank" >talkpython</a> 
Michael on Bluesky: <a href="https://bsky.app/profile/mkennedy.codes?featured_on=talkpython" target="_blank" >@mkennedy.codes at bsky.app</a> 
Michael on Mastodon: <a href="https://fosstodon.org/web/@mkennedy" target="_blank" >mkennedy</a> </div>

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#506: ty: Astral's New Type Checker (Formerly Red-Knot)

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