python实现的telnet客户端程序，python自带一个telnetlib模块，可以通过其Telnet类实现telnet操作

import getpass
import sys
import telnetlib
  
HOST = "hostname"
  
user = raw_input("Enter your remote account: ")
  
password = getpass.getpass()
  
tn = telnetlib.Telnet(HOST)
  
tn.read_until("login: ")
  
tn.write(user + "\n")
  
if password:
    tn.read_until("Password: ")
    tn.write(password + "\n")
  
tn.write("ls\n")
  
tn.write("exit\n")
  
print tn.read_all()