python『学习之路01』python 购物车精简版

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2017/11/17 1:52
# @Author  : mixiu26
# shopping.py

public_list = [
    ("iphone",5800),
    ("Mac Book",11800),
    ("Bike",1200),
    ("Wtach",10600),
    ("Coffee",31),
    ("Book",66)
]
Shopping_list = []
Salary = input("Input your salary: ")
if Salary.isdigit():
    salary = int(Salary)
    while True:
        for item in public_list:
             print(public_list.index(item),item)  # index --- >返回指定元素索引 
        user_choice = input("请选择您需要的商品 >>>>: ")
        if user_choice.isdigit():
            choice = int(user_choice)
            if choice >=0 and choice < len(public_list):
                p_item = public_list[choice] 
                if p_item[1] <= salary: 
                    Shopping_list.append(p_item)
                    # 余额扣款:
                    salary -= p_item[1]
                    print("Add %s into shppoing cart, your current balance is 33[31;1m%s33[0m" %(p_item,salary))
                else:
                    print("33[41;1m你的余额仅剩[%s], 请充值: 33[0m" % salary)
            else:
                print("The Product code [%s] your Input is not exist! " % choice)
        elif user_choice == "q":
            print("===================== shopping list ========================")
            for i in Shopping_list:
                print(i)
            print("Your current balance: ",salary)
            exit()
        else:
            print("没有查到当前编号对应的商品信息, 请重新输入: ")
else:
    print("没有查到当前编号对应的商品信息, 已退出")