购物车的实例

2020-02-17

_author_ = "chen"
product_list = [
    ('iphone', 5800),
    ('mac book', 9800),
    ('bike', 800),
    ('watch', 10600),
    ('coffee', 31),
    ('python', 120),

]
shopping_list = []
salary = input("input your salary:")
if salary.isdigit():
    salary = int(salary)
    while True:
        for index, item in enumerate(product_list):  # enumerate取下标
            print(index, item)
        user_choice = input("选择要买什么？：")
        if user_choice.isdigit():  # 判别是不是数字
            user_choice = int(user_choice)
            if user_choice < len(product_list) and user_choice >= 0:
                p_item = product_list[user_choice]
                if p_item[1] <= salary:  # 买得起
                    shopping_list.append(p_item)
                    salary -= p_item[1]
                    print("Added %s into shopping cart ,your current balance is33[31:1m %s33[0m" % (
                        p_item, salary))  # 打印颜色
                else:
                    print(":33[41;1m你的余额只剩[%s]啦，买毛线啊33[0m" % salary)
            else:
                print("product code [%s] is not exist!" % user_choice)
        elif user_choice == 'q':
            print("------shopping list------")
            for p in shopping_list:
                print(p)
            print("your current balance", salary)
            break
        else:
            print("invalid option")