Ty is a brand new, extremely fast Python type checker written in Rust from the fine folks at Astral, the makers of Ruff. Ty is in preview and is not ready

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Ty is a new Python type checker written in Rust by Astral (makers of Ruff), designed for extremely fast performance. Currently in preview, it can be installed via pip or run with uvx, used similarly to other type checkers with 'ty check' command, and includes VS Code extension support. The tool automatically ignores files in .gitignore and .ignore files and supports the language server protocol for IDE integration.

The Extremely Fast Python type checker