ImportError: cannot import name pxssh

Traceback (most recent call last):
  File "/root/Desktop/JuniperBackdoor-master/JuniperBackdoor.py", line 1, in <module>
    from pexpect import pxssh
ImportError: cannot import name pxssh

kali自带python 2.7.3，pexpect 模块版本太老，该升级啦。。

The pexpect library might be outdated, so run:

升级pexpect ：sudo pip install ImportError–upgrade