code: def get_batch_result_ids(self, job_id, batch_id):
          
          response = requests.get(self._get_batch_results_url(job_id, batch_id),
                                  headers=self._get_batch_info_headers())
          response.raise_for_status()
  
          root = ET.fromstring(response.text)
          result_ids = [r.text for r in root.findall('%sresult' % self.API_NS)]
  
          return result_ids
docs: Get result IDs of a batch that has completed processing.
  
          :param job_id: job_id as returned by 'create_operation_job(...)'
          :param batch_id: batch_id as returned by 'create_batch(...)'
          :return: list of batch result IDs to be used in 'get_batch_result(...)'