python实现Telnet远程登陆到设备并执行命令

#encoding=utf-8
import telnetlib
import time

def do_telnet(Host, username, password, finish, commands):

    # 连接Telnet服务器
    tn = telnetlib.Telnet(Host, port=23, timeout=10)
    tn.set_debuglevel(2)

    # 输入登录用户名
    tn.read_until(‘ENTER USERNAME < ‘)
    tn.write(username + ‘\r\n‘)

    # 输入登录密码
    tn.read_until(‘ENTER PASSWORD < ‘)
    tn.write(password + ‘\r\n‘)

    # 登录完毕后执行命令
    tn.read_until(finish)
    for command in commands:
        result = tn.write(‘%s\r\n‘ % command);

    #执行完毕后，终止Telnet连接（或输入exit退出）
    tn.read_until(‘COMMAND EXECUTED‘)
    tn.close() # tn.write(‘exit\n‘)

if __name__==‘__main__‘:
     # 配置选项
    Host = ‘10.68.165.25‘ # Telnet服务器IP
    username = ‘SYSTEM‘   # 登录用户名
    password = ‘SYSTEM‘  # 登录密码
    finish = ‘LEVEL COMMAND <___>‘      # 命令提示符
    commands = [‘ZUSI;‘]
    do_telnet(Host, username, password, finish, commands)

下一步：如何将write的执行结果输出？？？