Limier is a smart toolkit for conversion and validation of function arguments in Python powered by type annotations.
A typical use case is the conversion of route parameters in the context of web routing.
pip install limierfrom limier import converted, chain
# Custom converter: validate that the input value is positive
def positive(value: int) -> int:
if value < 0:
raise ValueError("Expected positive value")
return value
@converted
def compute(x: int, times: chain(int, positive)) -> float:
return x * times
result = compute("2", times="2.5")
assert result == 5