decorator to automatically convert python function parameters

parameters_as.py

from functools import wraps

conv={"int":int, "str":str, "bool":bool}

def arguments_as(typechoice):

    def decorator(f):
        @wraps(f)
        def func_wrapper(*args, **kwargs):
            return f(*[conv[typechoice](i) for i in args], **kwargs)
        return func_wrapper
    return decorator

@arguments_as("int")
def test_int(a):
  return a+1

@arguments_as("str")
def test_str(a):
  return a+" is a string"

@arguments_as("bool")
def test_bool(a):
  return a is True or a is False


print test_int("1")
print test_str(1)
print test_bool([])