--- title: astral-sh/ty: An extremely fast Python type checker and... description: Astral-sh/ty is an extremely fast Python type checker and language server, developed in Rust. The project is still in development and not production-ready.... canonical: https://daily.dev/posts/astral-sh-ty-an-extremely-fast-python-type-checker-and-language-server-written-in-rust--4wtehevxn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: astral-sh/ty: An extremely fast Python type checker and language server, written in Rust. | daily.dev og:description: Astral-sh/ty is an extremely fast Python type checker and language server, developed in Rust. The project is still in development and not production-ready.... og:url: https://daily.dev/posts/astral-sh-ty-an-extremely-fast-python-type-checker-and-language-server-written-in-rust--4wtehevxn og:image: https://api.daily.dev/og/posts/4WtehevXn.png og:image:alt: astral-sh/ty: An extremely fast Python type checker and language server, written in Rust. og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # astral-sh/ty: An extremely fast Python type checker and language server, written in Rust. **[Hacker News](https://daily.dev/sources/hn)** · 1 min read · 34 upvotes · 4 comments ## Summary Astral-sh/ty is an extremely fast Python type checker and language server, developed in Rust. The project is still in development and not production-ready. Contributions are welcome, and active development occurs in the Ruff repository. The project is under the MIT license. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@adamfourure75** · 1 upvotes > Can't wait to have it released! **@kdavid** · 0 upvotes > pretty cool seeing new tools pop up like this - you think early adoption by devs matters more than hype for growth? **@friedrich** · 0 upvotes > Pretty exciting ! I love how most of the tools we use are being rewritten in Rust ! --- Tags: [#python](https://daily.dev/tags/python), [#open-source](https://daily.dev/tags/open-source), [#rust](https://daily.dev/tags/rust) [View this post on daily.dev](https://daily.dev/posts/astral-sh-ty-an-extremely-fast-python-type-checker-and-language-server-written-in-rust--4wtehevxn) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"astral-sh/ty: An extremely fast Python type checker and language server, written in Rust.","url":"https://daily.dev/posts/astral-sh-ty-an-extremely-fast-python-type-checker-and-language-server-written-in-rust--4wtehevxn","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/astral-sh-ty-an-extremely-fast-python-type-checker-and-language-server-written-in-rust--4wtehevxn"},"datePublished":"2025-05-07T19:18:38.630Z","dateModified":"2025-05-07T19:18:52.317Z","description":"Astral-sh/ty is an extremely fast Python type checker and language server, developed in Rust. 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I love how most of the tools we use are being rewritten in Rust !","datePublished":"2025-05-30T11:09:03.651Z","url":"https://daily.dev/posts/4WtehevXn#c-omzNXmAey","author":{"@type":"Person","name":"Friedrich WT","url":"https://daily.dev/friedrich","image":"https://avatars.githubusercontent.com/u/136119888?v=4"}}]} ```