from pexpect import pxssh
 import getpass
 file = 'log.txt'
 fp = open(file, 'w')
 try:
    s = pxssh.pxssh()
    hostname = raw_input('hostname: ')
    username = raw_input('username: ')
    password = getpass.getpass('password: ')
    s.login(hostname, username, password)
    s.sendline('network port show')   # run a command
    s.prompt('cluster1::>')             # match the prompt
    print(s.before)        # print everything before the prompt.
    s.sendline('network interface show')
    s.prompt('cluster1::>')
    print(s.before)
    s.sendline('disk show')
    s.prompt('cluster1::>')
    print(s.before)
    s.logout()
except pxssh.ExceptionPxssh as e:
      print("pxssh failed on login.")
      print(e)