code: def _get_request(self, request_url, request_method, **params):
          
          if request_method == 'GET':
              if params:
                  request_url += '&%s' % urlencode(params)
              request = Request(request_url)
          elif request_method == 'POST':
              request = Request(request_url, urlencode(params, doseq=1))
          return request
docs: Return a Request object that has the GET parameters
          attached to the url or the POST data attached to the object.