HTTP request error with urlopen

[spandana g]

Hello ,

          I have written a code to get the page source of the google search
page .. this is working for other urls. I have this problem with

import re
from urllib2 import urlopen
string='http://www.google.com/search?num=20&hl=en&q=ipod&btnG=Search'
file_source=file("google_source.txt",'w')
file_source.write(urlopen(string).read())
page_content=file_source.readlines()

Traceback (most recent call last) :
File "C:/Python25/google.py", line 5,in <module>
    file_source.write(urlopen(string).read())
File "C:\Python25\lib\urllib2.py", line 124 , in urlopen
    return__opener.open(url,  data)
File "C:\Python25\lib\urllib2.py", line  387 , in open
   response =meth(req, response)
File "C:\Python25\lib\urllib2.py", line 498 , in http_response
   'http',   request,  response,  code,  msg,  hdrs)
File  "C:\Python25\lib\urllib2.py",  line 425,  in error
   return self._call_chain(*args)
File  "C:\Python25\lib\urllib2.py", line 360,  in __call_chain
   result = func(*args)
File "C:\Python25\lib\urllib2.py", line 506, in http_error_default
   raise HTTPError(req.get_full_url(),  code,  msg,  hdrs,  fp)
HTTPError:  HTTP Error 403: Forbidden

Actually urlopen is working for google labs sets page but not for the
google.com  and even I have same problem with wikipedia . Please let me know
.. If any one of have any idea about this .

Thank You,
Spandana.
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