今日学习记录：

元组：

和list的区别是，元组只有两个操作，count和index，不能修改，添加，删除

购物车示例：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Author:Jack Niu

product_list = [
    ("Iphone", 5888),
    ("Mac Pro", 11000),
    ("Bike", 899),
    ("Book", 78),
    ("Car", 300000)
]
shoplist = []
salary = input("Input your salary>>>>>:")
if salary.isdigit():
    salary = int(salary)
    while True:
        for index, product in enumerate(product_list):
            print(index,product)
        select = input("输入你要选择的商品编号》》》》:")
        if select.isdigit():
            select = int(select)
            if select < len(product_list) and select > -1:
                p_select = product_list[select]
                if p_select[1] <= salary:
                    shoplist.append(p_select)
                    salary -= p_select[1]
                    print("添加%s成功,你的余额还剩\033[31;1m%s\033[0m元" %(p_select, salary))
                else:
                    print("你的余额只剩%s了,买不起你来干毛!" % salary)

        elif select == "q":
            print("---------Shopping list----------")
            for p in shoplist:
                print(p)
            print("你的余额还有%s" %salary)
            exit()
        else:
            print("无效的输入")

Python学习记录-2016-12-18