python 多线程之thread
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#! /usr/bin/env python # -*- coding:utf-8 -*- from threading import Thread import subprocess from Queue import Queue num_threads = 3 ips = [ '10.108.100.174' , '119.75.218.77' , '127.0.0.1' ] q = Queue() def pingit(i, queue): while True : ip = queue.get() print "thread %s is pinging %s" % (i, ip) ret = subprocess.call( 'ping -c 3 %s' % ip, shell = True , stdout = open ( '/dev/null' , 'w' )) #正常则返回0,异常则返回1;stdout=open('/dev/null','w')屏蔽ping具体细节信息 if ret ! = 0 : print "%s is down" % ip queue.task_done() for i in xrange (num_threads): #xrang比range好 t = Thread(target = pingit, args = (i, q)) t.setDaemon( True ) #设置了setDaemon则线程会随着主线程关闭而关闭,python中,主线程结束后,会默认等待子线程结束后,主线程才退出 t.start() for ip in ips: q.put(ip) print "main thread is waiting..." q.join() print "Done..." |
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