How to use telnet in python

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 + "
")

if password:
    tn.read_until("Password: ")
    tn.write(password + "
")

tn.write("ls
")

tn.write("exit
")

print tn.read_all()