python基础 day12

# 作业
# FLAG=False
# def login(func):
#     def inner(*args,**kwargs):
#         global FLAG
#         lis=[]
#         if FLAG:
#             ret = func(*args, **kwargs)
#             return ret
#         else:
#             username=input('请输入用户名:')
#             password=input('请输入密码:')
#             with open('userlist',encoding='utf-8') as f:
#                 for line in f:
#                     lis.append(line)
#                 if username==lis[0].strip() and password==lis[1].strip():
#                     print('恭喜你登陆成功')
#                     FLAG=True
#                     ret=func(*args,**kwargs)
#                     return ret
#                 else:print('登陆失败!')
#     return inner
#
#
# @login
# def shoplist_add():
#     print('增加一个物品')
# @login
# def shoplist_del():
#     print('删除一个物品')
#
# shoplist_add()
# shoplist_del()

# def log(func):
#     def inner(*args,**kwargs):
#         ret=func(*args,**kwargs)
#         with open('userlist','a',encoding='utf-8') as f:
#             f.write('{}\n'.format(func.__name__))
#         return ret
#     return inner
#
# @log
# def shoplist_add():
#     print('增加一个物品')
# @log
# def shoplist_del():
#     print('删除一个物品')
# shoplist_add()
# shoplist_del()

import time
FLAG=False
def time_out(flag):
    def timmer(func):
        def inner(*args,**kwargs):
            if flag:
                start=time.time()
                ret=func(*args,**kwargs)
                end=time.time()
                print(start-end)
                return ret
            else:
                ret = func(*args, **kwargs)
                return ret
        return inner
    return timmer
@time_out(FLAG)
def wahaha():
    time.sleep(0.1)
    print('whaaaaaaaa')
wahaha()

@time_out(FLAG)
def erguotou():
    time.sleep(0.1)
    print('erguotoutoutou')
erguotou()

#多个装饰器装饰一个函数  套娃现象
def wrapper1(func): #func---->inner2
    def inner1():
        print('wrapper1,before func')
        ret=func()   #func()---->inner2()
        print('wrapper1,after func')
        return ret
    return inner1

def wrapper2(func):  #func---->f
    def inner2():
        print('wrapper2,before func')
        ret=func()  #func()----f()
        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

@wrapper1 #---->f=wrapper1(f)   warpper1(f)---->inner1()
@wrapper2 #---->f=wrapper2(f)   f---->inner2
# @wrapper3
def f():
    print('my is f')
    return '蒙了吧,哈哈哈!'
print(f())

#执行的结果:

wrapper1,before func
wrapper2,before func
my is f
wrapper2,after func
wrapper1,after func
蒙了吧,哈哈哈!