windows系统用python查看在线主机脚本

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import os,re

with open("ip.txt","w",encoding="utf-8") as f:
   for i in range(20,30):
       ip=os.popen("ping -n 1 192.168.72.%s"%i).read().strip()
       f.write(ip)
with open("ip.txt",encoding="utf-8") as f_r,open("ip2.txt","w",encoding="utf-8") as f_w:
   for i in f_r:
       if "TTL" in i:
           m = re.search("\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}", i)#用正则匹配IP
           f_w.write("%s\n"%m.group())