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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_redirect(self, authorization_url, extra_params):
 """ Returns a ``HttpResponseRedirect`` object to redirect the user to the URL the OAuth provider handles authorization. """

        request_token = self._get_request_token()
        params = {'oauth_token': request_token['oauth_token'],
                  'oauth_callback': self.request.build_absolute_uri(
                      self.callback_url)}
        params.update(extra_params)
        url = authorization_url + '?' + urlencode(params)
        return HttpResponseRedirect(url)