购物车小程序

　　需求：启动程序后提示用户输入工资，打印商品列表，容许用户根据商品编码购买商品，用户选择商品后，检测余额是否足够，够就直接扣款，不够就提醒，可随时退出，退出时打印已购买商品和余额

#!/usr/bin/env python # -*- coding: utf-8 -*- #author:hanly
 salary = int(raw_input('please input your salary:')) cargo_list = [['IphoneX',6000],['milk',60],['bike',800]] want_to_buy_list = [] while True: print '商品列表'.center(50, '*') for index,cargo in enumerate(cargo_list): print  index+1, '-->', cargo want_to_buy = raw_input('please input the number you want(input q to quit):') if want_to_buy=='q': print 'you have been quit'
        print '购买信息'.center(50, '*') print 'your shopping cart has goods blow'
        for i in want_to_buy_list: print i print '\033[31;1myour mony now is %s \033[0m'% salary exit() elif want_to_buy.isdigit(): want_to_buy = int(want_to_buy) if want_to_buy<0 or want_to_buy>len(cargo_list): print '输入有误请从新输入'
            continue temp_list = cargo_list[want_to_buy-1] if salary <temp_list[1]: print 'this cargo need more mony,the surplus mony is not enough'

        else: salary = salary - temp_list[1] want_to_buy_list.append(temp_list) print 'your current mony is \033[31;1m%s\033[0m'%salary else: print '输入有误请从新输入'