Astral's ty: A New Blazing-Fast Type Checker for Python - Real Python
Briefly

Astral's ty: A New Blazing-Fast Type Checker for Python - Real Python
"After Ruff and uv, the Astral team is back with another Rust-based tool called ty, short for type check. This new tool delivers a lightning-fast static type-checking experience in Python, aiming to outpace existing tools in both performance and convenience. By incorporating ty into your daily workflow, you'll catch type-related bugs earlier and get clearer feedback. But is ty suitable for you? Take a look at the table below to make a quick decision:"
"At the time of writing, ty is available as an early preview release with hundreds of open issues. Despite being actively developed and boasting over ten thousand stars on GitHub, it's still missing essential features and might occasionally fail. As such, it's not ready for full adoption in production yet, nor is it going to be a drop-in replacement for any of its competitors."
ty is a Rust-based static type checker for Python that prioritizes speed and convenience to outperform existing tools. The tool provides lightning-fast type checking that helps catch type-related bugs earlier and gives clearer feedback. The project is open-source under the MIT license and developed by Astral, with most code written in Rust, though no Rust environment is required to run ty. The release is an early preview with hundreds of open issues and over ten thousand GitHub stars. Essential features are still missing, the implementation is evolving rapidly, and the tool is not yet production-ready.
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