Python Multi-thread thread

Python Multi-thread thread

#!  /usr/bin/env python#-*-coding:utf-8-*-from Threading Import threadimport subprocessfrom Queue Import Queuenum_threads = 3ips = [' 10.108.100.174 ', ' 119.75.218.77 ', ' 127.0.0.1 ']q = Queue () def pingit (i, Queue): While    True:        IP = queue.ge T ()        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, Exception returns 1;stdout=open ('/dev/null ', ' w ') masking ping details        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, in Python, after the main thread ends, it waits for the child thread to end by default, and the mainline friend exits    T.start () for IP in IPs:    Q.put (IP) print "Main thread is waiting ..." q.join () print "Done ..."

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