我在哪里用这个装饰器代码犯了错误？

Question

I am trying to understand the concept of decorators in python when we have different arguments (In fact I am not sure how to pass arguments to the decorator). I have written the small and simple code below but I am not able to run it:

def advance(*arg, function):
    result = a * function(b, c)
    print(result)

@advance
def Sum1(b, c):
    return b + c

print(Sum1(1, 2, 3))

When running the code, I get TypeError: advance() missing 1 required keyword-only argument: 'function'.

Answer 1

Decorator has to return a new function, so you would like to have something like:

def advance(function):
    def wrapped(a, b, c):
        return a * function(b, c)
    return wrapped

@advance
def Sum1(b, c):
    return b + c

print(Sum1(10, 2, 3))