Python-Pexpect模块pxssh遇到连接不成功的问题

 

在linux上运行ssh连接脚本如下：

#!/usr/bin/python

import pxssh

import getpass

try:

        s = pxssh.pxssh()

        hostname=raw_input('hostname: ')

        username=raw_input('username: ')

        password=raw_input('password: ')

        s.login(hostname,username,password)

        s.sendline('uptime')

        s.prompt()

        print s.before

        s.sendline('ll')

        s.prompt()

        print s.before

        s.sendline('df -hl')

        s.prompt()

        print s.before

        s.logout()

except pxssh.ExceptionPxssh, e:

        print "pxssh failed on login"

        print str(e)

 

报错信息如下：

[root@agent02 studyPython]# ./test1.py

hostname: 192.168.107.80

username: oss

password: XXXX

Traceback (most recent call last):

  File "./test1.py", line 9, in

    s.login(hostname,username,password)

  File "/usr/lib/python2.6/site-packages/pxssh.py", line 243, in login

    if not self.synch_original_prompt():

  File "/usr/lib/python2.6/site-packages/pxssh.py", line 134, in synch_original_prompt

    self.read_nonblocking(size=10000,timeout=1) # GAS: Clear out the cache before getting the prompt

  File "/usr/lib/python2.6/site-packages/pexpect.py", line 824, in read_nonblocking

    raise TIMEOUT ('Timeout exceeded in read_nonblocking().')

pexpect.TIMEOUT: Timeout exceeded in read_nonblocking().

[root@agent02 studyPython]# find / -name pxssh.py

/usr/local/rx/pexpect/pexpect-2.3/pxssh.py

/usr/local/rx/pexpect/pexpect-2.3/build/lib/pxssh.py

/usr/lib/python2.6/site-packages/pxssh.py

 

解决办法：

[root@agent02 studyPython]# find / -name pxssh.py

/usr/local/rx/pexpect/pexpect-2.3/pxssh.py

/usr/local/rx/pexpect/pexpect-2.3/build/lib/pxssh.py

/usr/lib/python2.6/site-packages/pxssh.py

修改/usr/lib/python2.6/site-packages/pxssh.py，

在def synch_original_prompt (self):方法下第一个self.read_nonblocking(size=10000,timeout=1)前面增加两行代码：self.sendline()

 time.sleep(0.5)

修改以后，可以正常工作。