# def wrapper(f):#     def inner(*args,**kwargs):#         print('在被装饰的函数执行之前做的事')#         res = f(*args,**kwargs)#         print('在被装饰的函数执行之后做的事')#         return res#     return inner# @wrapper            # holiday = wrapper(holiday)    这时holiday == inner# def holiday(day):#     print('全体放假%s天'%day)#     return '好开心'# ret = holiday(3)# print(ret)

# def outer(*args,**kwargs):#     print(args,kwargs)#     print(*args)#     def inner(*args):#         print('inner:', args)#     inner(*args)# outer(1,2,3,4,a = 1,b = 2)

# def wahaha():#     '''#     一个打印娃哈哈的函数#     :return:#     '''#     print('娃哈哈')# print(wahaha.__name__)  # 查看字符串格式的函数名# print(wahaha.__doc__)   # document (查看函数的注释)

# from functools import wraps# def wrapper(f):     # f = holiday#     @wraps(f)                               # 加上这句话之后, holiday 就是holiday 不是inner了#     def inner(*args,**kwargs):#         print('在被装饰的函数执行之前做的事')#         res = f(*args,**kwargs)#         print('在被装饰的函数执行之后做的事')#         return res#     return inner# @wrapper            # holiday = wrapper(holiday)    这时holiday == inner  ，这时还没加上面那句话# def holiday(day):#     print('全体放假%s天'%day)#     return '好开心'# ret = holiday(3)# print(holiday.__name__)     # 输出inner，加了上面那句话之后输出 holiday

# ---------------------------------------------------------------------------------------------------- #

# 带参数的装饰器

# 500个函数## import time# FLAG = True# def timmer_out(flag):#     '''#     计算机函数执行时间#     :param flag:flag为真时,运行这个函数,为假时不运行#     :return:#     '''#     def timmer(func):#         def inner(*args,**kwargs):#             if FLAG:#                 start_time = time.time()#                 ret = func(*args,**kwargs)#                 end_time = time.time()#                 print(end_time - start_time)#                 return ret#             else:#                 ret = func(*args, **kwargs)#                 return ret#         return inner#     return timmer# @timmer_out(FLAG)           # 先调用timmer_out(FLAG)，返回的结果为timmer, 加了@ 之后就等于 @timmer,就等于wahaha = timmer(wahaha)# # 上个式子等价于：# # timmer = timmer_out(FLAG)# #@timmer## def wahaha():#     time.sleep(0.1)#     print('娃哈哈')# @timmer_out(FLAG)# def erguotou():#     time.sleep(0.1)#     print('二锅头')# wahaha()# erguotou()

# 多个装饰器装饰一个函数

## def wrapper1(func):     # func --> f#     def inner1():#         print('wrapper1,before func')#         func()      # f#         print('wrapper1,after func')#     return inner1## def wrapper2(func):     # func --> inner1#     def inner2():#         print('wrapper2, before func')#         func()      # 其实是 inner1()#         print('wrapper2, after func')#     return inner2## @wrapper2   # f = wrapper2(f) --> wrapper2(inner1), 返回的inner2，故 f == inner2# @wrapper1   # f = wrapper1(f) 返回的inner1，故 f == inner1## # 先找最近的函数,wrapper2没找到, wrapper1先找的f()，然后wrapper2又找的# def f():#     print('in f')## f() # --> inner2()

# ---------------------------------------------------------------------------------- ## 三个

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@wrapper1def f():    print('in f')    return '哈哈哈'print(f())

# 记录用户的登录情况 and 计算这个函数的执行时间