error installing nltk supporting packages : nltk.download()

I have installed the nltk package. Following that I am trying to download the supporting packages using nltk.download() and am getting error:

[Errno 11001] getaddrinfo

My machine / software details are:

OS: Windows 8.1 Python: 3.3.4 NLTK Package: 3.0

Below are the commands run in python:

Python 3.3.4 (v3.3.4:7ff62415e426, Feb 10 2014, 18:13:51) [MSC v.1600 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.

import nltk

nltk.download()
showing info http://nltk.github.com/nltk_data/
True

nltk.download("all")
[nltk_data] Error loading all: <urlopen error [Errno 11001]
[nltk_data]     getaddrinfo failed>
False

enter image description here

It looks like it is going to http://nltk.github.com/nltk_data/ whereas it should Ideally try to get the data from http://www.nltk.org/nltk_data/.

On another machine when we type http://nltk.github.com/nltk_data/ in the browser, it redirects to http://www.nltk.org/nltk_data/. I am not understanding why the redirection is not happening on my laptop.

I feel that this might be the issue.

I have added the command prompt screenshot. enter image description here

Solution

Got the solution. The issue in my case was that when the NLTK downloader started it had the server index as - http://nltk.github.com/nltk_data/

This needs to be changed to - http://nltk.org/nltk_data/

You can change this by going into the NLTK Downloader window and the File->Change Server Index.

Regards, Bonson