code: def append_records(self, dataset_key, stream_id, body):
          
          owner_id, dataset_id = parse_dataset_key(dataset_key)
          try:
              return self._streams_api.append_records(owner_id, dataset_id,
                                                      stream_id, body)
          except _swagger.rest.ApiException as e:
              raise RestApiError(cause=e)
docs: Append records to a stream.
  
          :param dataset_key: Dataset identifier, in the form of owner/id
          :type dataset_key: str
          :param stream_id: Stream unique identifier.
          :type stream_id: str
          :param body: Object body
          :type body: obj
          :raises RestApiException: If a server error occurs
  
          Examples
          --------
          >>> import datadotworld as dw
          >>> api_client = dw.api_client()
          >>> api_client.append_records('username/test-dataset','streamId',
          ...     {'content':'content'})  # doctest: +SKIP