Another working code, help required for faster multithreading execution

[anna]

Hi All,

this code is taking, device ips from file and threads to print output in file. I have replaced multiple spaces with single space. This code is taking around 5min and devices are 450. Is there any tweak in this for faster execution. thanks forum to help me for initial code.

import os
import unidecode
import telnetlib
import time
import re
from time import sleep
start = time.time()
outfile = open('zyxelmac.txt','w')
def open_telnet(ip):
        user = 'admin'
        password = '1234'
        sr_no = 0
        try:
            telnet = telnetlib.Telnet(ip, 23, 2)
            telnet.read_until('User name:', 3)
            telnet.write(user.encode('ascii') + '\r')
            telnet.read_until('Password:', 3)
            telnet.write(password.encode('ascii') + '\r')
            telnet.write('statistics mac 1~48' + '\r\r\r\r')
            telnet.read_until('>')
            telnet.write(' exit''\r')
            output = telnet.read_all()
            sleep(2)
            data = iter(output.split('\n'))

            try:
                        for line in data:
                                if "Port:" in line:
                                        port1 = line.split(':')
                                        port = str(port1[:5])
                                        port2 = port[10:13].strip()
                                        port3 = port2.replace('\\','')
                                        next(data)
                                        next(data)
                                        port_mac = next(data)[1:]
                                        formatted_line = (ip+' '+port3+' '+port_mac)
                                        line = re.sub('\s{2,}', ' ', formatted_line)
                                        outfile.write(line+'\n')
            except StopIteration:
                   pass
        except Exception as excp:
            print('time out \n')
def create_threads():
    threads = []
    with open('zyxel.txt','r') as ipfile:
        for sr_no, line in enumerate(ipfile, start=1):
            ip = line.strip()
            th = threading.Thread(target = open_telnet ,args = (ip,))
            th.start()
            threads.append(th)
        for thr in threads:
            thr.join()

if __name__ == "__main__":
        create_threads()
        print "Exiting the program"
        outfile.close()
        print('It took', time.time()-start, 'seconds.')