#!/usr/bin/env python2.7

#-*- coding:utf8 -*-

import signal

def handler(signum,frame):

        print 'Signal handler called with signal',signum

        raise TimeOutError,"TimeOut!"

try:

        signal.signal(signal.SIGALRM,handler)

        signal.alarm(1)

        while True:

                print 'a'

                signal.alarm(0)

except:

        print

        print 'Timeout caught'