python 3.5 购物小程序

 #!/usr/bin/env python
 #encoding: utf-8
 import time
 import os

 nowtime = time.strftime('%Y-%m-%d %H:%M:%S')
 shopping_total_money = 0
 shopping_car = {}

 def touch_shopping_log():
     with open('shopping_log.txt', 'w') as shopping_log:
         pass

 def shopping_log_add(log):
     with open('shopping_log.txt', 'a') as shopping_log:
         shopping_log.write('%s : %s : %s\n' % (nowtime,name,log))

 shopping_list = [
     ["phone",100],
     ["computer",200],
     ["car",1000],
     ["home",10000],
 ]
 def welcome_info():

     print ('_________________________________')
     print ('welcome to shopping 北京购物广场')
     print ('now time is : %s' % (nowtime))
     print ('_________________________________')

 def shopping_list_info():
     for index,info in enumerate(shopping_list,0):
         print ('%s | name: %s | money: %s' % (index,info[0],info[1]))

 def shopping_start():
     while True:
         shop_num = int(input('please input number [88:quit]:'))
         if shop_num == 88:
             break
         shopping_car[shopping_list[shop_num][0]] = shopping_list[shop_num][1]

 def shopping_stop():
     global  shopping_total_money
     print ('.............shopping list open...........')
     for k,v in shopping_car.items():
         print ('name: %s money: %s' % (k,v))
         shopping_total_money += v
     print('............shopping list end.......')
     print ('total cost   [%s]    yuan' % (shopping_total_money))

 def shopping_close():
     global shopping_total_money
     make_sure = input('make sure [y|n]')
     if make_sure == 'y':
         print ('thank you come on')
         for k, v in shopping_car.items():
             log_info = 'name: %s money: %s' % (k, v)
             shopping_log_add(log_info)
         shopping_total_money = 0
         shopping_car.clear()

     elif make_sure == 'n':
         print ('your no make sure')
         print ('clear shopping car .....')
         shopping_total_money = 0
         shopping_car.clear()

 def shopping_run():
     global  name
     welcome_info()
     shopping_list_info()
     print ('________________________________')
     name = input('inout your name:')
     shopping_start()
     shopping_stop()
     shopping_close()

 if __name__ == "__main__":
     while True:
         shopping_run()
         time.sleep(2)
         os.system('cls')

记录日志信息：

 2016-10-30 09:21:40 : beijing : name: car money: 1000
 2016-10-30 09:21:40 : beijing : name: computer money: 200
 2016-10-30 09:21:40 : beijing : name: home money: 10000
 2016-10-30 09:21:40 : shanghai : name: phone money: 100
 2016-10-30 09:21:40 : shanghai : name: car money: 1000
 2016-10-30 09:21:40 : shanghai : name: computer money: 200