python-购物车实例

 

程序练习 

程序：购物车程序

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

 

 

# Author:Jamie Yang

Product_list = [
    ("Iphone", 5800),
    ("Mac", 12000),
    ("Bike", 800),
    ("Watch", 10600),
    ("Coffee", 48),
    ("Book", 45),

]
shopping_list = []
salay = input("Input your salay:")
if salay.isdigit(): #判断salay输入的字符串是否是只包含数字
    salay = int(salay)
    while True:
        forindex,item in enumerate(Product_list):
            print(index, item)
        #for item in Product_list:
            #print(Product_list.index(item),item)
        user_choice = input("您购买的商品>>>:")

 

        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] <= salay:
                    shopping_list.append(p_item)
                    salay -= p_item[1]
                    print("Added %s into shopping cart, your current balance is \033[31;1m%s\033[0m" %(p_item, salay))
                else:
                    print("\033[41;1m你的余额只剩[%s]啦，买不起你选中的商品\033[0m" %salay)
            else:
                print("您选中的商品不存在")

        elifuser_choice == "q":
            print("---------------shopping list----------")
            for p in shopping_list:
                print(p)
            print("Your current balance:", salay)
            exit()
        else:
            print("invalid option")
            exit()
           # print("exit......！")

扩展：

isdigit(): #判断salay输入的字符串是否是只包含数字