ping

import os,threading

ip=input('请输入要检测的ip:').strip().split('.')[0:3]
ip='.'.join(ip)

def detect(i):
    address=ip+'.%s'%i
    res=os.popen('ping -n 2 %s '%address)
    res=''.join(res)
    if res.find('TTL=') != -1:
        print(address)


for i in range(1,255):
    threading.Thread(target=detect,args=(i,)).start()