Python学习之列表--自动超市购物车

效果图：

实现代码：

menu = [0,5000,500,9000,3000,30,50,7000,70,40]
name = [0,"iphone","bicycle","Mac book","Meizu S16","coffee","backpack","computer","table","chair"]
msg = """
Welcome to Mr.Zhu's shop
1.iphone    5000
2.bicycle   500
3.Mac book  9000
4.Meizu S16 3000
5.coffee    30
6.backpack  50
7.computer  7000
8.table     70
9.chair     40
0.exit
"""
money = int(input("Your Salary:"))
gets = 1
shop_list = []
spend = 0
print(msg)
while(gets):
    gets = int(input("Please input the number of goods:"))
    if(gets != 0):

        spend = menu[gets]
        if(money > spend):
            shop_list.append(name[gets])
            money -= spend
            print("Successfully put the good in shop list,and you have remain",money)
        else:
            print("You not have enough money!")
    else:
        gets = 0
        print("Welcome to come Mr.Zhu's shop again\nYou have bought :",shop_list,"\nYour remain money is:",money)

解析：
输入你的薪水，然后选择想要购买的物品，购物车自动帮告诉你账户余额并告诉你是否足够购买该商品。
很简单的两个列表，一个存价格，一个用于返回购物清单的名字，其中最开始的打印菜单可以通过循环等将两个列表结合起来打印，也可以以例子中固定模板的形式打印，循环打印代码为：

msg = 0
for i in range(0,9):
    msg = i + 1
    if(i == 0):
        print("Welcome to Mr.Zhu's shop")
    print(i+1,".",name[msg],"      \t",menu[msg])
    if(i == 8):
        print("0 . exit")
有一点，用打印输出容易对不齐价格，因为商品名称可能有些长有些短，如果想避免这个问题：1.更改商品名称，争取几个名字字符相差不超过4个字符（\t的大小）2.增加一个判断最长名称长度的if，然后通过给短的多加\t来实现等长。