对python多线程SSH登录并发脚本详解

# -*- coding: utf-8 -*-
import paramiko
import threading
import time
lt = []
def ssh(a,xh,sp):
 count = 0
 for i in range(0,xh):
  try:
   ssh = paramiko.SSHClient()
   ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
   ssh.connect('ip地址',22,'用户名', '密码')
   ssh.close()
   print u"线程[%s]第[%s]次登录"%(a,i)
   if sp != 0:
    time.sleep(sp)
   count += 1
  except:
   print u"线程异常，已处理"
 lt.append(count)
  
if __name__ == "__main__":
 figlet = '''
   _____ _____ _ 
  | ___| | _ \ | | 
  | |__ | |_| | | | 
  | __| | _ { | | 
  | |  | |_| | | | 
  |_|  |_____/ |_| 
    Code by FBI.
   '''
 print figlet
 print u"认证攻击次数=线程数*每个线程认证攻击次数"
 print u"请输入线程数:"
 xc = raw_input()
 print u"请输入每个线程攻击次数:"
 xh = raw_input()
 print u"请输入每个线程延迟时间(秒)，0为不休眠:"
 sp = raw_input()
 try:
  print u"预计总共发送认证攻击%s次"%(int(xc)*int(xh))
  threads = []
  for j in range(int(xc)):
   threads.append(threading.Thread(target=ssh,args=(j,int(xh),int(sp),)))
  for t in threads:
   t.start()
   print t.name
 
  t.join()
 
  print lt
  count = 0
  for count in lt:
   count += count
  print u"程序执行完毕总共发送认证攻击【%s】次" % count
 except ValueError,e:
  print u"因为输入不规范导致程序出现错误，请输入数字"