What is this?
ty is an extremely fast Python type checker and language server written in Rust, built by Astral (the team behind uv and Ruff). It is currently in beta.
ty is an extremely fast Python type checker and language server written in Rust, built by Astral (the team behind uv and Ruff). It is currently in beta.Do I import ty as a Python library, or run it separately?ty is not a Python package you import; it is a standalone CLI type checker and a language server (LSP) that editors like VS Code, PyCharm, and Neovim connect to.
ty is not a Python package you import; it is a standalone CLI type checker and a language server (LSP) that editors like VS Code, PyCharm, and Neovim connect to.How do I get ty running?The quickest way is to run `uvx ty`, which fetches and runs it without a separate install step. You can also try it instantly in the browser-based playground before installing anything.
The quickest way is to run `uvx ty`, which fetches and runs it without a separate install step. You can also try it instantly in the browser-based playground before installing anything.Do I need Python installed to use ty?Not necessarily - the standalone installer doesn't require Python at all. The Python version used to install ty is also independent of the Python version it type-checks.
Not necessarily - the standalone installer doesn't require Python at all. The Python version used to install ty is also independent of the Python version it type-checks.Is ty stable enough for production use?Not yet - ty uses 0.0.x versioning and has no stable API, so breaking changes, including changes to diagnostics, can happen between any two versions.
Not yet - ty uses 0.0.x versioning and has no stable API, so breaking changes, including changes to diagnostics, can happen between any two versions.How much faster is ty than mypy or Pyright?The project claims ty is roughly 10x to 100x faster than mypy and Pyright, largely thanks to being written in Rust with fine-grained incremental analysis.
The project claims ty is roughly 10x to 100x faster than mypy and Pyright, largely thanks to being written in Rust with fine-grained incremental analysis.Why is ty's development happening in the Ruff repository?ty's Rust source code lives as a submodule inside the Ruff repository, so pull requests touching the core checker are opened there instead of in the ty repo itself.
ty's Rust source code lives as a submodule inside the Ruff repository, so pull requests touching the core checker are opened there instead of in the ty repo itself.How do you pronounce 'ty'?It's pronounced 'tee-why' (/tiːwaɪ/), and the project asks that it just be stylized as 'ty'.
It's pronounced 'tee-why' (/tiːwaɪ/), and the project asks that it just be stylized as 'ty'.What are similar projects?uv, ts-rust, helix, rust-analyzer, LunarVim, YouCompleteMe, ruff, fallow
uv, ts-rust, helix, rust-analyzer, LunarVim, YouCompleteMe, ruff, fallowWhich topics is it in?language-server, uv, neovim, ide, vscode, static-analysis, performance, rust, command-line-tool, terminal, cli, python
language-server, uv, neovim, ide, vscode, static-analysis, performance, rust, command-line-tool, terminal, cli, python