python之02数据类型学习-作业练习

题目：

购物车程序
salary = 5000
1. iphone6s 5800
2. mac book 9000
3. coffee 32
4. python book 80
5. bicyle 1500
>>>:1
余额不足，-3000
>>>:5
已加入bicyle 到你的购物车， 当前余额:3500
>>>:quit
您已购买一下商品
bicyle 1500
coffee 30
您的余额为:2970
欢迎下次光临

程序如下：

# Author:Administrator
# date: //
 
Salary =
merchandise_list = (['iphone6s', ], ['mac book', ], ['coffee', ], ['python book', ], ['bicycle', ])
shopping_list = []
while True:
    user_input = input("请输入：")
    if user_input == "quit":
        if shopping_list.__len__() > :
            print(merchandise_list)
            print("您购买以下商品：")
            for item in shopping_list:
                item = list(item)
                print("商品:%s 价格：%d 数量 %d" % (item[], item[], item[]))
        exit("您的余额为：%d,欢迎下次光临！" % Salary)
    elif user_input.isdigit():
        Type = int(user_input)
        if  < Type < :
            merchandise = merchandise_list[Type - ]
            if Salary < merchandise[]:
                print("余额不足：%d" % (Salary - int(merchandise[])))
            else:
                Salary -= int(merchandise[])
                for item in shopping_list:
                    list_item = list(item)
                    if list_item[] == merchandise[]:
                        list_item[] +=
                        shopping_list.remove(item)
                        shopping_list.append(tuple(list_item))
                        print("商品%s购买成功" % item[])
                        break
                else:
                    shopping_item = []
                    shopping_item.extend(merchandise)
                    shopping_item.extend([])
                    print("商品%s购买成功" % shopping_item[])
                    shopping_list.append(tuple(shopping_item))
        else:
            print("没有您购买的商品，请输入[1-5]")
    else:
        print("请输入[1-5]或quit")