What's the best practice to validate parameter types at runtime in Python, with and without a third-party module?

This page summarizes the projects mentioned and recommended in the original post on /r/learnpython
Code Analysis and Linter Python3 Static Type Checker runtime-typechecking Python

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  • beartype

    Unbearably fast near-real-time hybrid runtime-static type-checking in pure Python.

    There is the beartype project.

  • mypy

    Optional static typing for Python

    Although I urge you to use type annotations and a static type checker (such as mypy and pyright) over runtime type checks.

  • WorkOS

    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  • pyright

    Static Type Checker for Python

    Although I urge you to use type annotations and a static type checker (such as mypy and pyright) over runtime type checks.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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