购物车作业

user = [{"name": "电脑", "password": 1999,"salay": 1999},{"name": "鼠标", "password": 10,"salay": 1999},{"name": "游艇", "password": 20,"salay": 1999},{"name": "美女", "password": 998,"salay": 1999},]

goods = [{"name": "电脑","price": 1999},{"name": "鼠标", "price": 10},{"name": "游艇", "price": 20},{"name": "美女", "price": 998},]


shopping_cart = []
exit_flag = False
while not exit_flag:
    user_name = input(" 请输入用户名： ")#输入信息
    Flag = False
    pass_flag = False
    for item in user:
        if user_name == item["name"]:
            Flag = True
            user_password = input(" 请输入密码： ")
            if user_password == item["password"]:
               pass_flag = True
               print('登录成功！')
               print("----商品列表----")

            else:
                print('''密码错误，请重新输入密码''')
                user_password = input("请输入输入密码:")
                continue
        else:
            password = []
            login_name = []
            salay = []
            login_name = input("请注册用户名")
            salay = input("请输入您的工资：")  #注册
            d1 = dict(zip(password , login_name,salay))
            user.append(d1)
            print('''注册成功，%s你好，您当前余额为：%s''' % (user_name, salay))
            break


        for k, i in enumerate(goods):
            print('%s.  %s  price:%s' % (k, i['name'], i['price']))#接下来是用工资和商品价格


    choice = input("输入想买的商品编号：")
    if choice.isdigit():
        choice = int(choice)
        if choice >= 0 and choice < len(goods):
            if salay >= choice:
                shopping_cart.append(goods[choice])
                print('added goods %s into shopping_cart.'%(goods[choice]['name']))
                salay -= goods[choice]['price']
            else:
                print("余额不足")

    elif choice == 'q':
        if len(shopping_cart) > 0:
            print("----你已经购买了----")
        for k, i in enumerate(goods):
            print('%s.  %s  price:%s' % (k, i['name'], i['price']))
            print("余额：:",salay)
        exit_flag = True