Fehler bei der Verwendung von conn = httplib.HTTPConnection ("http://ipaddr:port")

Ich bin mit

httplib.HTTPConnection ("http://ipaddr:port")  
conn.request("GET", "", params, headers)

Ich bin in der Lage, das zu tun PUT/GET mit IP-addr:port mit meinem firefox-client!!.
Aber ich sehe diesen Fehler bei der Ausführung des Skripts:

 File "post_python.py", line 5, in <module>
    conn.request("GET", "", params, headers)
  File "/usr/lib64/python2.6/httplib.py", line 914, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib64/python2.6/httplib.py", line 951, in _send_request
    self.endheaders()
  File "/usr/lib64/python2.6/httplib.py", line 908, in endheaders
    self._send_output()
  File "/usr/lib64/python2.6/httplib.py", line 780, in _send_output
    self.send(msg)
  File "/usr/lib64/python2.6/httplib.py", line 739, in send
    self.connect()
  File "/usr/lib64/python2.6/httplib.py", line 720, in connect
    self.timeout)
  File "/usr/lib64/python2.6/socket.py", line 553, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno -2] Name or service not known"

Bitte kann mir jemand helfen ??