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 reddit.com/r/learnpython

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  • beartype

    Unbearably fast O(1) runtime 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.

  • Scout APM

    Less time debugging, more time building. Scout APM allows you to find and fix performance issues with no hassle. Now with error monitoring and external services monitoring, Scout is a developer's best friend when it comes to application development.

  • 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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