code: def get_batch_result(self, job_id, batch_id, result_id):
          
          response = requests.get(self._get_batch_result_url(job_id, batch_id, result_id),
                                  headers=self._get_session_headers())
          response.raise_for_status()
  
          return response.content
docs: Gets result back from Salesforce as whatever type was originally sent in create_batch (xml, or csv).
          :param job_id:
          :param batch_id:
          :param result_id: