#多个装饰器装饰一个函数 def wrapper1(func):     def inner1():         print('wrapper1 ,before func')         ret = func()         print('wrapper1 ,after func')         return ret     return inner1 def wrapper2(func):     def inner2():         print('wrapper2 ,before func')         ret = func()         print('wrapper2 ,after func')         return ret     return inner2 def wrapper3(func):     def inner3():         print('wrapper3 ,before func')         ret = func()         print('wrapper3 ,after func')         return ret     return inner3 @wrapper3 @wrapper2 @wrapper1 def f():     print('in f')     return '哈哈哈'