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Strong Typing

Decorator which checks at Runtime whether the function is called with the correct type of parameters.
And raises TypeMisMatch if the used parameters in a function call where invalid.

This is the release for Python-3.14 and above

  • If you need a different version please checkout the release Tags 2.*.*

Performance boost with mypyc

  • Since 3.13.6 mypyc is used to compile the core logic code.
  • This results in a significant performance boost from around 5x faster, especially for large containers.

Async functions

Use the dedicated a_match_typing decorator for async def functions. It preserves the coroutine interface while validating annotated arguments before the function runs.

from strongtyping.astrong_typing import a_match_typing
import asyncio


@a_match_typing
async def add(left: int, right: int) -> int:
    return left + right


async def main() -> None:
    result = await add(1, 2)  # 3
    await add(1, "2")  # raises TypeMismatch


asyncio.run(main())

See the async type checking documentation for configuration options and further examples.

🤖 AI Agent Ready

This library includes Agent Skills for AI coding assistants (like Claude Code, Cursor, and GitHub Copilot). These skills provide the AI with specialized knowledge on how to apply runtime type checking, handle TypeMismatch exceptions, and follow best practices when using strongtyping in your codebase.

You can validate the skills by running:

pytest tests/test_skills.py

Docs are available on 'readthedocs'

Project links

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Credits

Author: FelixTheC

GitHub Statistics

Data verified by PyPI on Jul 28, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License (CC-BY-ND-4.0)

Requires

Python >=3.14

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