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Pyright is a fast, standards-based static type checker for Python capable of handling large codebases. It provides both a command-line tool and a Visual Studio Code extension for type checking and editor integration. The project is open source (Microsoft) with documentation, a playground, and contribution guidelines.
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Often described as
fast · essential · recommended · best · static type checking
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Excerpts where Pyright appeared in the AI's answer
Pyright (and its wrapper, Pylance ) is extremely fast and scales brilliantly on large codebases
Pyright is specifically designed for high-performance type checking of large Python source bases.
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