Executed the python file and got the following error:

maniram@maniram-tux:~/Documents/Python/jabbalaci-blog-assets-ad765b5/20120517-Github-Python-Projects$ python ghpp.py
Traceback (most recent call last):
File "ghpp.py", line 56, in
main()
File "ghpp.py", line 49, in main
choose_from(URL_POP)
File "ghpp.py", line 43, in choose_from
text = urllib2.urlopen(url).read()
File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 406, in open
response = meth(req, response)
File "/usr/lib/python2.7/urllib2.py", line 519, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python2.7/urllib2.py", line 444, in error
return self._call_chain(_args)
File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
result = func(_args)
File "/usr/lib/python2.7/urllib2.py", line 527, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 404: Not Found