python pexpect模块

import pexpect
 pexpect.run("ls /tmp", withexitstatus=1)

chk = pexpect.spawn("ls -l /tmp/")
chk = pexpect.spawn("ls", ['-l', '/tmp/'])

ssh_k = pexpect.spawn('ssh root@192.168.1.245 -p22')
ssh_k.expect("password:")
ssh_k.expect("[p,P]assword:")
#匹配多种结果
ssh_k.expect([pexpect.TIMEOUT, pexpect.EOF, "password"])

pexpect向子程序发送指令

def login_ssh_passwd(port="",user="",host="",passwd=""):
    '''函数：用于实现pexepect实现ssh的自动化用户密码登录'''

    # print 'ssh -p %s %s@%s' % (port,user, host)
    if  port and user and host and passwd:
        ssh = pexpect.spawn('ssh -p %s %s@%s' % (port,user, host))
        i = ssh.expect(['password:', 'continue connecting (yes/no)?'], timeout=5)
        if i == 0 :
            ssh.sendline(passwd)
        elif i == 1:
            ssh.sendline('yes\n')
            ssh.expect('password: ')
            ssh.sendline(passwd)
        index = ssh.expect (["#", pexpect.EOF, pexpect.TIMEOUT])

        if index == 0:
            print "logging in as root!"
            ssh.interact()
        elif index == 1:
            print "logging process exit!"
        elif index == 2:
            print "logging timeout exit"
    else:
        print "Parameter error!"

def login_ssh_key(keyfile="",user="",host="",port=""):
    '''函数：用于实现pexepect实现ssh的自动化密钥登录'''

    if  port and user and host and keyfile:
        ssh = pexpect.spawn('ssh -i %s -p %s %s@%s' % (keyfile,port,user, host))
        i = ssh.expect( [pexpect.TIMEOUT,'continue connecting (yes/no)?'], timeout=2)
        # print '...................................',0
        if i == 1:
            ssh.sendline('yes\n')
            index = ssh.expect (["#", pexpect.EOF, pexpect.TIMEOUT])
        else:
            index = ssh.expect (["#", pexpect.EOF, pexpect.TIMEOUT])
        if index == 0:
            print "logging in as root!"
            ssh.interact()
        elif index == 1:
            print "logging process exit!"
        elif index == 2:
            print "logging timeout exit"
    else:
        print "Parameter error!"