函数式编程可以配合装饰器使用

def outer(n):
    """思路不影响原来的函数情况下，用装饰器扩展"""
    def inner(x,y):
        list1 = []# 

        b = x + y
        list1.append(b / 2)
        print(list1)
        return n(x,y)
    return inner

@outer
def add(x,y):
    return x + y

p = reduce(add,range(15))
if __name__ == "__main__":
    print (p)