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Astral has released ty, a new type checker and language server for Python that outperforms existing tools like mypy and Pyright. Built in Rust, it offers rapid incremental updates and a robust diagnostic system. The beta version is available for installation via the uv tool or as a VS Code extension.
ty is a Python type checker and language server built in Rust, offering significant speed improvements over mypy and Pyright. It provides detailed diagnostics, advanced typing features, and integrates with popular editors like VS Code and PyCharm. You can use an online playground to test it with code snippets.