装饰器

from functools import wraps
Flag=True

def age(flag):
    def war(c):
        def inner(*arg,**args):
            ret=None
            if(flag):
                print("abc")
                ret=c(*arg,**args)
                print("def")
            else:
                ret=c(*arg,**args)
            return ret
        return  inner
    return  war


def sex(flag):
    def war(func):
        def inner(*arg,**args):
            ret = None
            if (flag):
                print("abc1")
                ret = func(*arg, **args)
                print("def1")
            else:
                ret = func(*arg, **args)
            return ret
        return inner
    return  war

@sex(Flag)
@age(Flag)
def cat(s):
 print("adsfasdf"+s)
 return  1


int= cat("ddddddddddddddddd")
print(int)

运行结果:

abc1
abc
adsfasdfddddddddddddddddd
def
def1
1