装饰器作用的完善

# 2.装饰器运用的例题，模拟网上商城的验证功能。
user_list=[
    {'name':'a','passwd':'123'},
    {'name':'b','passwd':'123'},
    {'name':'c','passwd':'123'},
    {'name':'d','passwd':'123'},
]
user_static={'username':"",'login':False}
def yanzheng(func):
    def jiance(*args,**kwargs):
        if user_static["username"] and user_static["login"]:
            ret = func(*args, **kwargs)
            return ret
        username = input("请输入用户名：").strip()
        userpasswd = input("请输入密码：").strip()
        for user_dict in user_list:
            if username==user_dict["name"] and userpasswd==user_dict["passwd"]:
                print("验证通过")
                user_static['username']=username
                user_static['login' ]=True
                ret=func(*args,**kwargs)
                return ret
            else:
                print("输入用户名或密码有误，请重新输入")
    return jiance
@yanzheng
def index(name):
    print("欢迎【%s】来到XX购物网站" %(name))
@yanzheng
def buycar(name):
    print("欢迎【%s】购买的【%s】" % (name,["汽水，面包，白菜，鲜奶"]))
def buy():
    print("准备好结账吧")

index("张三")
buycar("张三")