测试开发之购物车

产品需求：

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

goods_list = [
    ('Iphone',5800),
    ('Mac Pro',9800),
    ('Bike',800),
    ('Watch',10600),
    ('Coffee',31),
    ('Alex Python',120),
]#商品列表

shooping_cart = []#购物车列表
salary = input("please enter your salary:")#输入工资金额

if salary.isdigit():
    salary = int(salary)
    while True:
        for index,item in enumerate(goods_list):
            print(index,item)
        user_choice = input("需要购买的》》》")#输入商品编号
        if user_choice.isdigit():#判断编号是整数
            user_choice = int(user_choice)
            if user_choice <len(goods_list) and user_choice >=0:#判断商品编号存在
                p_item = goods_list[user_choice]
                if p_item[1] <= salary:#可以买的起
                    shooping_cart.append(p_item)
                    salary -= p_item[1]
                    print("Added the good %s into shopping list,and your current balance is \033[32;1m%s\033[0m" %(p_item,salary))
                else:#买不起处理
                    print("\033[41;1mYour current balance %s is not enough for payed\033[0m" %salary)
            else:#商品编号不存在
                print("product code [%s] is not exist" %user_choice)
        elif user_choice == 'q':#判断输入的是q，执行退出
            print("-----shopping list---------")
            for i in shooping_cart:#打印购买过的商品列表和余额
                print(i)
            print("Your current balance is %s" %salary)
            exit()
        else:#输入不合法字符处理
            print("invalid option...")