Error f = open(r'D:\NetAuto\myswitches.txt')

[phutran]

Hi all,
This is my code:

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import getpass import sys import telnetlib   user = raw_input("Enter your telnet username: ") password = getpass.getpass()   f = open(r'D:\NetAuto\myswitches.txt')   for line in f:     print "configuring Switch " + (line)     HOST = line     tn = telnetlib.Telnet(HOST)   tn.read_until("Username: ") tn.write(user + "\n") if password:     tn.read_until("Password: ")     tn.write(password + "\n")   tn.write("conf t\n")       for n in range(40,51):     tn.write("vlan " + str(n) + "\n")     tn.write("name Python_VLAN_" + str(n) + "\n")       tn.write("end\n")     tn.write("wr\n")     tn.write("exit\n")       print tn.read_all()

But there are error for the code:
configuring Switch 192.168.1.101

Error:
Traceback (most recent call last):
  File "D:\NetAuto\Openfile.py", line 13, in <module>
    tn = telnetlib.Telnet(HOST)
  File "C:\Python27\lib\telnetlib.py", line 211, in __init__
    self.open(host, port, timeout)
  File "C:\Python27\lib\telnetlib.py", line 227, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "C:\Python27\lib\socket.py", line 557, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno 11001] getaddrinfo failed

Please help me this error