用装饰器实现登录

login_status_jingdong = False
login_status_weixin = False

def start():
    list = {1: 'home', 2: 'finance', 3: 'book'}
    list1 = {1: home, 2: finance, 3: book}
    for i in list:
        print(i, list[i])
    select_num = input('请输入访问网页的编号[退出:q]>>')
    if select_num == 'q':
        return exit()
    elif select_num.isdigit():
        key = int(select_num)
        list1[key]()
    else:
        print('请输入有效值！')

def login(types = ""):
    def outers(a):
        def inner():
            global login_status_jingdong
            global login_status_weixin
            if types == "jingdong":
                if login_status_jingdong is False:
                    with open("jingdong","r",encoding="utf8") as f1:
                        d1={}
                        for i in f1.readlines():
                            [key,valus] = i.split("=")
                            d1[key]=valus.strip()
                        print(d1)
                    username = input("输入用户名:").strip() # 通过分隔符将字符串转为列表，并赋值给变量key和valus
                    password = input("输入密码:").strip() # 向字典中添加元素，这步就实现了字符串转为列表的功能
                    if username == d1["username"] and password == d1["password"]:
                        login_status_jingdong = True
                        a()
                    else:
                        print("账号或密码错误")

        return inner
    return outers

@login('jingdong')
def home():
    print('welcome to home page')
@login('weixin')
def finance():
    print('welcome to finance page')
@login('jingdong')
def book():
    print('welcome to book page')
while True:
    start()