最近在学习python，用python写了个检查ssh存活的脚本。写完后想增加多线程功能，加快效率，可是一直报错，麻烦大神帮我看下到底错在哪了

以下是代码：

#!/usr/bin/python import os import string import paramiko import traceback import threading class SshServerCMD(): def __init__(self): print 'start' self.username = 'root' self.passwd = '123' self.cmd = 'date +%s' self.ssh = paramiko.SSHClient() self.pass_file = '/opt/scripts/etc/ssh_proxy.conf' self.paramiko_log= '/tmp/check_ssh_proxy.log' self.threads = [] HostList = open(self.pass_file) for line in HostList.readlines(): ARAY_line = string.split(line) self.host = ARAY_line[0] self.port = int(ARAY_line[1]) self.t = threading.Thread(target = self.Connect,args = (self.host,self.port,self.username,self.passwd)) self.threads.append(self.t) for i in range(10): self.threads[i].start() for i in range(10): self.threads[i].join() def Connect(self,host,port,username,passwd): # This function is to connect the agent self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) #ssh.load_system_host_keys() paramiko.util.log_to_file(self.paramiko_log) try: self.ssh.connect(host,port,username,passwd) except Exception as e: print '\033[31m' + self.host,str(e) + '\033[0m' else: self.Cmd() self.ssh.close() def Cmd(self): stdin,stdout,stderr = self.ssh.exec_command(self.cmd) self.sout = stdout.readlines() print '\033[32m' + self.host,str(self.sout) + '\033[0m' if __name__ == '__main__': SshServerCMD()

以下是/opt/scripts/etc/ssh_proxy.conf文件内容

192.168.1.2 4001 192.168.1.3 4002 192.168.1.4 4003 192.168.1.5 4004 192.168.1.6 4005 192.168.1.7 4006 192.168.1.8 4007 192.168.1.9 4008 192.168.1.10 4009 192.168.1.11 4010

报错：
执行脚本后，发现程序不停在尝试ssh 192.168.1.11，也就是文本中所写的最后一行的ip地址，并且全部都是连接失败。在逻辑上我就想不通，就算是连接失败，也应该从第一行ip开始尝试，为什么会从最后一行ip开始ssh呢？并且一直在尝试ssh最后一行ip，求指教。