⚡ Strongpy

A simple runtime type checker for Python functions.

It validates function arguments and return values using type annotations.

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🚀 Features

• Runtime type checking for function arguments
• Return type validation
• Supports modern Python typing:
  • list[T]
  • dict[K, V]
  • tuple
  • set, frozenset
  • Union (|)
  • Literal

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📦 Installation

pip install strongpy

or (using uv)

uv add strongpy

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🧪 Usage

>>> from strongpy import strong

>>> @strong
... def add(x: int, y: int) -> int:
...     return x + y

>>> add(1, 2)
3

>>> add("1", 2)
Traceback (most recent call last):
  File "example.py", line 10, in <module>
    add("1", 2)
TypeError: argument 'x' expected int, got str

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🧠 Supported types

• int, str, float, bool
• list[T]
• dict[K, V]
• tuple[T, ...]
• set[T]
• frozenset[T]
• Union (int | str)
• Literal
• Any
• Never
• NoReturn

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⚙️ Philosophy

Strong is designed to be:

• simple
• explicit
• predictable

No magic, no runtime inference — only annotations.

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🐍 Requirements

• Python ≥ 3.13

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📌 License

MIT