python-pexpect demo

pexpect_ssh.py

import pexpect          # download from https://github.com/pexpect/pexpect

def remote_ssh_cmd(ip, cmd, user="root", passwd=""):
    ssh = pexpect.spawn('ssh %s@%s "%s"' % (user, ip, cmd))
    r = ''
    try:
        i = ssh.expect(['password: ', 'continue connecting (yes/no)?'])
        if i == 0 :
            ssh.sendline(passwd)
        elif i == 1:
            ssh.sendline('yes')
    except pexpect.EOF:
        ssh.close()
    else:
        print '>> ssh %s@%s "%s"' % (user, ip, cmd)
        r = ssh.read()
        ssh.expect(pexpect.EOF)
        ssh.close()
    return r