python 购物车作业

程序：购物车程序

需求:

    启动程序后，让用户输入工资，然后打印商品列表
    允许用户根据商品编号购买商品
    用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒
    可随时退出，退出时，打印已购买商品和余额'''
shopping_list = []
shopping_goods = [
    ("bicycle",500),
    ("car",5000),
    ("computer",8000),
    ("liwei",88),
    ("liqui",66),
    ("xiaojun",664),
                  ]
salary = input("请输入您的工资：")
if salary.isdigit():
    salary = int(salary)
    while True:
        for i in shopping_goods:
            print(shopping_goods.index(i),i)
        chouse = input("请选择您需要的商品编号：")
        if chouse.isdigit():
            chouse = int(chouse)
            if chouse >= 0 and chouse < len(shopping_goods):
                p_itme = shopping_goods[chouse]
                if p_itme[1]<=salary:     #余额足够买得起商品
                    salary -= p_itme[1]
                    shopping_list.append(p_itme)
                    print("您已购买的商品为：%s"%shopping_list,"您的余额还剩下:%s"%salary)
                else:
                    print("您的余额不足")
                    print("您已经买的商品为:",shopping_list)
                    break
            else:
                print("您选择的商品不存在，请从新选择。")
        else:
            chouse == "eeeeeee"
            print("您所购买的商品为:", shopping_list,)
            print("您的余额还剩下：%s"%salary)
            break