python 自定义信号处理器

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

import sys,time,signal

def now():
    return time.ctime(time.time())

def onSignal(signum,stackFrame):
    print ‘go signal {0} at {1}‘.format(signum,now())


if __name__=="__main__":
    signalNumber=12 #只打算为12这个信号增加处理器
    signal.signal(signalNumber,onSignal)
    while True:
        signal.pause()