import telnetlib
HOST = ("x.x.x.x")
USER = ("xxxxx")
PWD = ("yyyyy")
ENABLE = ("zzzzz")
TNT = telnetlib.Telnet(HOST, 23, 5)
TNT.read_until(b"Username:")
TNT.write(USER.encode('ascii') + b"n")
TNT.read_until(b"Password:")
TNT.write(PWD.encode('ascii') + b"n")
TNT.write(b"enablen")
TNT.read_until(b"Password:")
TNT.write(ENABLE.encode('ascii') + b"n")
TNT.write(b"terminal length 0n")
TNT.write(b"show runn")
TNT.write(b"exitn")
print (TNT.read_all().decode('ascii'))
TNT.close()
raw_input ("Press any Key to Quit: ")

Traceback (most recent call last):
  File "D:PythonTelnet (Python 2.7) V1.5.py", line 8, in <module>
    TNT = telnetlib.Telnet(HOST, 23, 5)
  File "C:Python27libtelnetlib.py", line 209, in __init__
    self.open(host, port, timeout)
  File "C:Python27libtelnetlib.py", line 225, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "C:Python27libsocket.py", line 571, in create_connection
    raise err
timeout: timed out
>>>

import socket
try:
    TNT = telnetlib.Telnet(HOST, 23, 5)
except socket.timeout:
    sulk()

>>> try:
...   t = telnetlib.Telnet("google.com", 23, 5)
... except:
...   import sys
...   exc_info = sys.exc_info()
>>> exc_info
(<class 'socket.timeout'>, timeout('timed out',), <traceback object at 0xb768bf7c>)

try:
    TNT = telnetlib.Telnet(HOST, 23, 5)
except IOError:
    sulk()

import telnetlib
HOST = ("x.x.x.x")
USER = ("xxxxx")
PWD = ("yyyyy")
ENABLE = ("zzzzz")
try:
    TNT = telnetlib.Telnet(HOST, 23, 5)
except:
    print "<your custom message>"
    pass
TNT.read_until(b"Username:")
TNT.write(USER.encode('ascii') + b"n")
TNT.read_until(b"Password:")
TNT.write(PWD.encode('ascii') + b"n")
TNT.write(b"enablen")
TNT.read_until(b"Password:")
TNT.write(ENABLE.encode('ascii') + b"n")
TNT.write(b"terminal length 0n")
TNT.write(b"show runn")
TNT.write(b"exitn")
print (TNT.read_all().decode('ascii'))
TNT.close()
raw_input ("Press any Key to Quit: ")

import getpass
    import sys
    import telnetlib
    import socket
    import time
    user = raw_input("Enter your username  account: ")
    password = getpass.getpass()


    for n in range (198,255):
            print "telnet to host"+str(n)



            try:
                 HOST="192.168.122."+str(n)
                 tn = telnetlib.Telnet(HOST,23,3)
                 print(HOST)
            except socket.timeout:
                 pass
            tn.read_until("Username: ")
            tn.write(user + "n")
            if password:
                tn.read_until("Password: ")
                tn.write(password + "n")

            tn.write("enablen")
            tn.write("ahmedn")

            for n in range(1,40):
                tn.write("vlan databasen")
                tn.write("vlan " + str(n) +" name "+ str(n)+"n")
                tn.write("exitn")
            tn.write("conf tn")
            tn.write("interface loopback 0 n")
            tn.write("ip address 10.10.10.10 255.255.255.0n")
            tn.write("no shutdownn")
            tn.write("exitn")
              tn.write("interface fastethernet 1/0 n")
            tn.write("no shutdownn")
            tn.write("exitn")
            tn.write("interface vlan 99  n")
            tn.write("ip address 5.5.5.5  255.255.255.0n")
            tn.write("no shutdownn")
            tn.write("endn")
            tn.write("exitn")

telnet to host199
Traceback (most recent call last):
  File "python2017.py", line 17, in <module>
    tn = telnetlib.Telnet(HOST,23,3)
  File "/usr/lib/python2.7/telnetlib.py", line 211, in __init__
    self.open(host, port, timeout)
  File "/usr/lib/python2.7/telnetlib.py", line 227, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "/usr/lib/python2.7/socket.py", line 575, in create_connection
    raise err