#!/usr/bin/python
#auto change gateway Created By mickelfeng
import os
import random,re
g='gateway 192.168.1.'
rand=random.randint(1,3)
test='www.baidu.com'
command='/etc/init.d/networking restart'
GW = "%s%d"%(g,rand)
PingTest = 'ping -c 3 ' + test
try:
  result=os.system(PingTest)
  print result
  if result!=0:
    data = open('/etc/network/interfaces').read()
    data = re.sub('gateway 192.168.1.*',GW, data)
    open('/etc/network/interfaces', 'wb').write(data)
    os.system(command)
    os.system(command)
except:
  pass