如何Python3.4使用pexpect來實現SSH登陸

#!/usr/local/python3.4/bin/python3.4

import pexpect

ip="192.168.46.22"

name="root"

pwd="abc"

#發送命令執行交互

child=pexpect.spawn('ssh %s@%s' % ("root",ip) )

#

child.expect ('password:')

child.sendline(pwd)

child.expect('$')

child.sendline('df -h')

#發送命令

child.sendline("exit")

child.interact()

#關閉pexpect

child.close()