validateargs.py

from typchk import *
def validateargs(**kwargs):
    c = Checker(kwargs)

    def decorator(f):
        def wrapper(*args, **funkwargs):
            try: 
                if funkwargs:
                    res = c.check(funkwargs)
                else:
                    if args:
                        res = c.check(dict(zip(f.__code__.co_varnames, args)))
            except:
                raise
            else:
                return f(*args, **funkwargs)

        return wrapper
    return decorator

@validateargs(a=int, b=int, c=Option)
def add2(a, b, c=None):
    return a+b

print(add2(3, 4))
print(add2("ahmed", 3))