#!/usr/bin/env python

 # encoding: utf-8

 #能购买的商品的东西

 goods = [

     ["一本书", 40], ["牙膏", 3], ["牙刷", 5], ["自行车", 200], ["手表", 100],

     ["面膜", 10], ["哇哈哈", 5], ["卫龙", 2], ["果冻", 23], ["水饺", 12], ["姨妈巾", 5],

     ]

 #输入你准备用多少钱去购买商品,并判断输入的是否是数字。

 flag = True

 while flag:

     salary = input("\033[1;34;40m请输入准备花多少钱去购物: ")#\033[显示方式;前景色;背景色m + 结尾部分：\033[0m

     if salary.isdigit():

         salary = int(salary)

         cash = salary

         break

 else:

     print("输入的金额方式不对，请正确输入的数字：")

 #先建一个购物车空列表

 shopping_cart = []

 #下面是想把购买的商品放入购物车中。

 while flag:

     for i,v in enumerate(goods, 1):#enumerate函数打印时，内容前面有编号，后面的参数1的意思是从1开始编号。

         print("\033[0m \033[0;32;40m",i,"\t",v,"\033[0m")

     select_num = input("\033[1;34;40m请选择您需要购买的商品(输入编号即可，输入'q'即可退出): ")

     if select_num.isdigit():

         select_num = int(select_num)

         if select_num > 0 and select_num <= len(goods):

             if salary >= goods[select_num-1][1]:

                 shopping_cart.append(goods[select_num - 1])

                 salary -= goods[select_num-1][1]

             else:

                 print("\033[5;35;47m余额不足。。。剩余：%f\033[0m" % salary)

         else:

             print("\033[5;35;47m没有你想要的商品编号，请重新输入编号，谢谢!\033[0m")

     elif select_num == 'q':

         break

     else:

         print("\033[5;35;47m您输入的内容不正确，请重新输入编号!\033[0m")

 #打印购物车里的东西，并判断确定是否购买

 print("\033[0m \033[1;31;40m----------------购物车的清单-------------------\033[0m")

 shopping_cart_norepeat = []

 for trade in shopping_cart:

     if trade not in shopping_cart_norepeat:

         shopping_cart_norepeat.append(trade)

 for commodity in shopping_cart_norepeat:

     n = shopping_cart.count(commodity)

     print("\033[1;32;40m",commodity[0],"-----",n,"件-----",commodity[1]*n,"元\033[0m")

 #确定是否购买商品。

 sure = input("\033[4;31;40m你确定购买吗？(y/n) ")

 if sure == 'y':

     print("\033[0m \033[5;32;40m你已经购买了以上的商品。剩余金额为：%f元\033[0m" % salary)

 else:

     print("\033[0m \033[5;32;40m你没购买的以上商品,剩余金额不变: %f元\033[0m" % cash)