经过几天的学习，pexpect模块对于linux下运维脚本编写属实有用，下面写个脚本检验下学习效果。

#!/usr/bin/env python
#coding=utf-8
#远程执行服务器上的脚本
import sys, time, os, multiprocessing
try:
    import pexpect
except ImportError:
    print """
         You must install pexpect module
    """
    sys.exit(1)
addr_map = {
    ‘s1‘:(‘root@192.168.1.1‘, ‘aaa‘),
    ‘s2‘:(‘root@192.168.1.2‘, ‘bbb‘),
}
cmd_map = {
    ‘four‘:"/usr/local/src/four.sh",
    ‘five‘:"/usr/local/src/five.sh",
}
# 必须带1个参数
if len(sys.argv) != 2:
    #系统错误输出
    print ‘wrong!!!‘
    sys.stderr.write("Usage: python %s cmd \n" % sys.argv[0])
    raise SystemExit(1)
      
try:
    cmd_key = sys.argv[1]
    print ‘cmd_key: %s‘ % cmd_key
    cmd = cmd_map[cmd_key]
    print ‘cmd: %s‘ % cmd
except:
    sys.stderr.write("Usage: python %s cmd \n" % sys.argv[0])
    print "cmd: four or five"
    raise SystemExit(1)
‘‘‘
# ####################################
# 定义函数，并将其作为单个进程
def runn(s):
  child = pexpect.spawn(‘ssh %s %s‘ % (addr_map[s][0],cmd_map[cmd_key]))
  index = child.expect(["(?i)password", pexpect.EOF, pexpect.TIMEOUT])
  child.sendline(addr_map[s][1])
  child.expect(pexpect.EOF)
  print child.before
  child.sendline("quit")
for key in addr_map:
  p = multiprocessing.Process(target=runn, args=(key,))
  p.start()
‘‘‘
# #######################################
# 将进程定义为类
class ttt(multiprocessing.Process):
  def __init__(self,id):
    multiprocessing.Process.__init__(self)
    self.id = id
    print self.id
  def run(self):
    child = pexpect.spawn(‘ssh %s %s‘ % (addr_map[self.id][0],cmd_map[cmd_key]))
    index = child.expect(["(?i)passwd",pexpect.EOF,pexpect.TIMEOUT])
    child.sendline(addr_map[self.id][1])
    child.expect(pexpect.EOF)
    print child.before
    child.sendline("quit")
for key in addr_map:
  p = ttt(key)
  p.start()