Shulou(Shulou.com)06/02 Report--

Use the module queue queue to control access to global variables

The suprocess creation child process generates multiple shell

This script can be used to judge the network connectivity of each device during the network splicing transformation. The ip address and device name are read from the enterprise configuration library. Use the queue to control variable reading. Ping quickly within 2 seconds.

#! / usr/bin/python#-*- coding: utf-8-*-from threading import Threadimport subprocessfrom Queueimport Queueimport pymysqlnum_threads=10q=Queue () def pingme (iMagol queue): while True: ip=queue.get () ret=subprocess.call ('ping-c 1% s'% ip [0], shell=True,stdout=open ('/ dev/null','w'), stderr=subprocess.STDOUT) # [accept variable string as command, ping sends an ICMP request And redirect standard output to / dev/null, which is equivalent to discarding, and redirect standard error output to standard output. This statement returns the ping value, that is, the python program first creates the shell process, the shell creates the ping process, the ping process runs the return value is waiting for the shell, and the shell returns the value to the python program wait, which is 0.] If ret==0: print'% s is support'% (ip [1], ip [0]) elif ret==1: print'% s is down...'% (ip [1], ip [0]) queue.task_done () # start num_threads threads for i in range (num_threads): t=Thread (target=pingme,args= (I) Q) # Multithreading calls t.setDaemon (True) # sets the daemon thread t.start () db= pymysql.connect (host= "10.50.99.247", user= "network", passwd= "xxxx", port=3306, db= "network", charset='utf8') cursor = db.cursor () cursor.execute ("select ipadd" Name from net_dev where `group`like 'xxx%' ") data = cursor.fetchall () for i in data: q.put (I) # upload list q.join () Print 'finish' ~

Batch test script

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