It is the most mature tool with extensive community support and third-party plugin ecosystems (e.g., for Django or Pydantic).
The Modern Python Type-Checking Ecosystem Python’s transition from a purely dynamic language to one that supports robust static analysis has been driven by the introduction of type hints via PEP 484 . While Python remains dynamic at runtime, using external type checkers has become an industry standard for maintaining "clean code"—defined as code that is readable, maintainable, and bug-free. 1. Mypy: The Reference Standard 4 Python type checkers to keep your code clean
Created by Microsoft, Pyright is a fast type checker written in TypeScript, optimized for large codebases. It is the most mature tool with extensive
Projects requiring the highest level of specification conformance and those using complex third-party libraries. 4 Python type checkers to keep your code clean