ty icon
ty icon

ty

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

Cost / License

  • Free
  • Open Source (MIT)

Platforms

  • Mac
  • Linux
  • Windows
  • Docker
  • Python
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Recent activities

  • niksavc liked ty
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    POX added ty as alternative to Codacy, Pyrefly, Ruff and PyLint + 12 similar activities
  • POX added ty

ty information

  • Developed by

    US flagAstral

  • Licensing

    Open Source (MIT) and Free product.

  • Written in

  • Alternatives

    16 alternatives listed

  • Supported Languages

    • English

GitHub repository

  •  17,390 Stars
  •  217 Forks
  •  733 Open Issues
  •   Updated  
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What is ty?

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

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

Highlights:

  • 10x - 100x faster than mypy and Pyright
  • Comprehensive diagnostics with rich contextual information
  • Configurable rule levels, per-file overrides, suppression comments, and first-class project support
  • Designed for adoption, with support for redeclarations and partially typed code
  • Language server with code navigation, completions, code actions, auto-import, inlay hints, on-hover help, etc.
  • Fine-grained incremental analysis designed for fast updates when editing files in an IDE
  • Editor integrations for VS Code, PyCharm, Neovim and more
  • Advanced typing features like first-class intersection types, advanced type narrowing, and sophisticated reachability analysis

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