#!/usr/bin/python

import subprocess,time,pynotify

while True:
    a=subprocess.Popen(['ping','-c','1','192.168.1.254'],stdout=subprocess.PIPE).communicate()[0].splitlines()
    if len(a)==0 or a[-1]=='':
        n=pynotify.Notification('ping','failed')
        n.set_timeout(2000)
        n.show()
        time.sleep(40)
    else:
        time.sleep(2)