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A super small package for function input type checking

Project description


created by Austin Poor

Build Status PyPI PyPI - Python Version

Super tiny python package for function typechecking.


Install with pip

$ pip install typewrap


There's only one function in the package, typeCheck, a decorator function that checks the function input and outputs against the function annotations.


from typewrap import typeCheck

def add_noChecks(a: int, b: int) -> int:
    """Has annotations but doesn't
    check argument types."""
    return a + b

def add_checkInputs(a: int, b: int) -> int:
    return a + b

def add_checkOutputs(a: int, b: int) -> int:
    return float(a+b)

# Unwrapped function with 
# uninforced type annotations
add_noChecks(1,2.0) # No errors

# Wrapped function with bad
# input arguments
add_checkInputs(1,2.0) # Raises TypeError

# Wrapped function with
# bad output type
add_checkOutputs(1,2) # Raises TypeError

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