函数闭包模拟session

userlist = [
    {'name':'doudou','passwd':'123'},
    {'name':'chouchou','passwd':'456'},
    {'name':'liuhaiquan','passwd':'789'},
    {'name':'liuxue','passwd':'2020'}
]

current_list = {'username':None,'login':False} #定义一个空的全局变量

def jingdong(yanzheng):
    def yonghu(*args,**kwargs):
        if current_list['username'] and current_list['login']: #判断是否已经有用户输入
            res = yanzheng(*args,**kwargs)  #运行装饰器
            return res
        username = input('用户名： ').strip()
        passwd = input('密码： ').strip()
        for user_dic in userlist:
            if username == user_dic['name'] and passwd == user_dic['passwd']:
                current_list['username'] = username
                current_list['login'] = True
                res = yanzheng(*args,**kwargs) #运行装饰器
                return res
        else:  #如果for循环结束为止，还是没有验证成功，则打印密码或用户错误
            print('用户或密码错误')
    return yonghu

@jingdong
def desk(name):
    print('欢迎来到京东 %s' %name)

@jingdong
def shopcar(name):
    print('%s 的购物车里有[%s,%s,%s]' %(name,'水果','饮料','饼干'))

@jingdong
def mina(name):
    print('显示%s的主页' %name)

desk('chouchou')
shopcar('dd')
mina('kl')