user_list=[

     {'name':'alex','passwd':''},

     {'name':'linhaifeng','passwd':''},

     {'name':'wupeiqi','passwd':''},

     {'name':'yuanhao','passwd':''},

 ]

 current_dic={'username':None,'login':False}

 def auth_func(func):

     def wrapper(*args,**kwargs):

         if current_dic['username'] and current_dic['login']:

             res = func(*args, **kwargs)

             return res

         username=input('用户名：').strip()

         passwd=input('密码：').strip()

         for user_dic in user_list:

             if username == user_dic['name'] and passwd == user_dic['passwd']:

                 current_dic['username']=username

                 current_dic['login']=True

                 res = func(*args, **kwargs)

                 return res

         else:

             print('用户名或者密码错误')

     return wrapper

 @auth_func

 def index():

     print('欢迎来到京东主页')

 @auth_func

 def home(name):

     print('欢迎回家%s' %name)

 @auth_func

 def shopping_car(name):

     print('%s的购物车里有［%s,%s,%s］' %(name,'奶茶','妹妹','娃娃'))

 print('before-->',current_dic)

 index()

 print('after--->',current_dic)

 shopping_car(current_dic["username"])

 home('产品经理')

 # shopping_car('产品经理')

 before--> {'username': None, 'login': False}

 用户名：alex

 密码：123

 欢迎来到京东主页

 after---> {'username': 'alex', 'login': True}

 欢迎回家产品经理

 alex的购物车里有［奶茶,妹妹,娃娃］