通过导入外部文件来导入数据：

shop.txt

car    200000
iphone    4999
bicycle    500
cafe    35

##########################################################

python源代码：

#!/usr/bin/env python
# encoding=utf-8
# author:sihaogongyuan
# date:2015-4-9
# filename:shop.py
# desc:shop
####################################
import os
import sys
####################################
os.system('date')
product_list=[]
price_list=[]
shop_list=[]
####################################
f=file('shop.txt','r')
for line in f.readlines():new_line=line.split()product_list.append(new_line[0])price_list.append(int(new_line[1]))
####################################salary=int(raw_input('\033[32mplease input your salary:\033[0m'))
####################################
while True:#passprint 'product list:'for p in product_list:p_index=product_list.index(p)p_price=price_list[p_index]print p,p_pricechoice=raw_input('please input your choice:')f_choice=choice.strip()while f_choice.strip=='':choice=raw_input('please input your choice:')f_choice=choice.strip()if f_choice in product_list:f_choice_index=product_list.index(f_choice)f_choice_price=price_list[f_choice_index]if salary>=f_choice_price:yes_or_no=raw_input('que ren goumai %s product?yes or no:'%(f_choice))if yes_or_no=='yes':print '\033[32m%s have add shop_list\033[0m'%(f_choice)shop_list.append(f_choice)salary=salary-f_choice_priceprint '\033[32m余额是:\033[0m',salaryelse:print '\033[32mcancle %s into gouwuche...\033[0m'%(f_choice)print '\033[32m余额是:\033[0m',salaryelse:if salary<min(price_list):print '\033[31mnot buy anything!!!!\033[0m'print '\033[32mgouwuche you:\033[0m',shop_listprint '\033[32m余额是:\033[0m',salarysys.exit()else:print '\033[31m not afford %s,please try other\033[0m'%(f_choice)print '\033[32m余额是:\033[0m',salaryelse:print '\033[31m what you want is not founed,please try other\033[0m'