basedpyright is a fork of Microsoft’s Pyright static type checker that adds stricter diagnostics, editor capabilities and configuration improvements. It builds on Pyright’s analysis engine while introducing changes intended to make stronger type checking more practical for everyday Python development.
The application provides additional checks for potentially unsafe typing practices that may be accepted by less restrictive configurations. It also offers language server features inspired by Pylance, Microsoft’s proprietary Python development extension.
basedpyright is particularly useful for developers who want to introduce stricter type checking without immediately correcting every issue in an existing project. Its baseline mechanism helps distinguish previously identified problems from errors introduced by new code, allowing teams to improve type safety incrementally.
This is free and open source software.
Key Features
- Introduces additional diagnostic rules for detecting potentially unsafe or ambiguous typing practices.
- Provides recommended, strict and all checking modes with different levels of diagnostic enforcement.
- Supports baselines for suppressing existing errors while continuing to detect newly introduced issues.
- Includes language server functionality inspired by Pylance for use with compatible editors.
- Can be installed through Python packaging tools without requiring a separate Node.js installation.
- Coordinates its editor and command-line releases to help maintain consistent diagnostic results.
- Offers configurable rule overrides and diagnostic severity settings for gradual adoption.
- Incorporates upstream Pyright improvements while retaining its additional checking capabilities.
Website: github.com/DetachHead/basedpyright
Support:
Developer: DetachHead
License: MIT License
basedpyright is written in Python. Learn Python with our recommended free books and free tutorials.
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