import sys
import telnetlib

HOST = '10.25.0.10'
user = 'cctc'
password = 'dangermouse'

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.interact()