Python之signal模块

http://www.cnblogs.com/dkblog/archive/2011/03/07/1980636.html

1、超时处理

#!/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'