购物车程序练习--Python（Alex视频学习）20180609

程序练习：购物车程序

要求：

1.启动程序后，让用户输入工资，然后打印商品列表

2.允许用户根据商品编号购买商品

3.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

4.可随时退出，退出时，打印已购买商品和余额

#商品清单
product_list=[
    ("IPhone", 5800),
      ("Mac Pro",12000),
      ("Starbuck Latte",31),
      ("Alex Puthn",81),
        ("Bike",800)
]
salary=input("Input your salary:")
shopping_list=[]
if salary.isdigit():#判断输入工资是否为整数 ，并转化为整数
    salary=int(salary)
    while True:
        for item in product_list:
          print(product_list.index(item),item)
        buy_choice=input("您需要购买的商品编号是：")
        if buy_choice.isdigit():
            buy_choice=int(buy_choice)
            if buy_choice<len(product_list) and buy_choice>=0:#判断商品编码是否在所列清单里
                p_item=product_list[buy_choice]
                if p_item[1]<=salary:#判断是否能够买得起
                    shopping_list.append(p_item)
                    salary-=p_item[1]
                    print(shopping_list)
                    print("your current balance is \033[31;1m%s\033[0m,thank you!" % salary)
                else:
                    print("\033[41;1myour money is %s, not enough to bus goods\033[1m" % salary)
            else:
                print("product is not exist")
        elif buy_choice=="q":#退出程序控制
            print("----shoppinp list-----")
            for p in shopping_list:
                print(p)
                print("your banlance is:", salary)
                exit()
else:
    print("Input is wrong")