decorators.py

def ntimes(n):
    def inner(f):
        def wrapper(*args, **kwargs):
            for _ in range(n):
                print('Running: {.__name__}'.format(f))
                rv = f(*args, **kwargs)
            return rv
        return wrapper
    return inner

@ntimes(2)
def add(x, y=10):
    return x + y

@ntimes(5)
def sub(x, y):
    return x - y

print('Add:', add(10))
print('Sub:', sub(10, 5))