python实战小程序之购物车

# Author:南邮吴亦凡


# 商品列表
product_list = [
    ('Iphone',5800),  # 逗号一定不可以省略！
    ('Mac',4800),
    ('smartphone',400),
    ('watch',9100),
    ('coffee',500),
    ('python',9200),
]
shopping_list = []

# 工资
salary = input("Input your salary:")  # 输入的是字符串
if salary.isdigit():   # 如果这是一个数字，就转成数字
    salary = int(salary)
    while True:
        # for item in product_list:
            print(item)                           # 无序号
        # for item in product_list:
            print(product_list.index(item),item)  # 有序号（1）

        for index,item in enumerate(product_list):
            print(index,item)                     # 有序号（2）

# 选择买的商品
        user_choice = input("选择要买吗？>>>:")
        if user_choice.isdigit():
            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]  # 把商品的钱从工资里扣除
                    print("Added %s into shopping cart,your current balance is 33[31;1m%s33[0m" %(p_item,salary))
                    # print("Added %s into shopping cart,your current balance is %s" %(p_item,salary))  # 余额没有颜色
                else:    # 买不起
                    print("33[41;1m你的余额只剩[%s]啦33[0m" % salary)  # 31无背景的红色，41有背景的红色
            print("商品[%s]不存在")
        elif user_choice =='q':
            print("-----shopping list------")
            for p in shopping_list:
                print(p)
            print("your current balance:",salary)
            exit()
        else:
            print("invalid option")