An extremely fast Python type checker and language server, written in Rust.
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ty

ty PyPI Discord

An extremely fast Python type checker and language server, written in Rust.

ty is backed by Astral, the creators of uv and Ruff.

Getting started

Run ty with uvx to get started quickly:

uvx ty check

Or, check out the ty playground to try it out in your browser.

To learn more about using ty, see the documentation.

Installation

To install ty, see the installation documentation.

To add the ty language server to your editor, see the editors documentation.

Getting help

If you have questions or want to report a bug, please open an issue in this repository.

You may also join our Discord server.

Contributing

Development of this project takes place in the Ruff repository at this time. Please open pull requests there for changes to anything in the ruff submodule (which includes all of the Rust source code).

See the contributing guide for more details.

License

ty is licensed under the MIT license (LICENSE or https://opensource.org/licenses/MIT).

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in ty by you, as defined in the MIT license, shall be licensed as above, without any additional terms or conditions.