import os
import sys
import getpass
import re
import telnetlib

HOST = "ip of host"
user = raw_input("Enter your remote account: ")
password = raw_input("Enter the password: ")

tn = telnetlib.Telnet(HOST)

tn.read_until("login: ")
tn.write(user + "n")
tn.read_until("Password: ")
tn.write(password + "n")
tn.read_until("*>")
tn.write("command-to-be-executedn")
tn.write("exitn")
output = tn.read_all()
f= open("C:/Python27/Scripts/logfile/module_show.txt" , "w+")
f.write(output)
f.close()
tn.close()

import re

regex = re.compile("^(|ER)")
with open("C:/Python27/Scripts/logfile/module_show.txt") as f:
    for line in f:
        result = regex.search(line)
        if result:
            print line

f.close()