BasedPyright

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library 1.39.0 ·python
verified Apr 9, 2026

BasedPyright is a static type checker for Python, forked from Pyright. It aims to provide various type checking improvements, integrate Pylance features (previously exclusive to VS Code), and introduce new diagnostic rules. Unlike upstream Pyright, it is officially published on PyPI, removing the requirement for Node.js. It is actively maintained with frequent releases, currently at version 1.39.0.

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