How to use the datalab.utils.Http.request function in datalab

def table_delete(self, table_name):
    """Issues a request to delete a table.

    Args:
      table_name: the name of the table as a tuple of components.
    Returns:
      A parsed result object.
    Raises:
      Exception if there is an error performing the operation.
    """
    url = Api._ENDPOINT + (Api._TABLES_PATH % table_name)
    return datalab.utils.Http.request(url, method='DELETE', credentials=self._credentials,
                                      raw_response=True)

def buckets_get(self, bucket, projection='noAcl'):
    """Issues a request to retrieve information about a bucket.

    Args:
      bucket: the name of the bucket.
      projection: the projection of the bucket information to retrieve.
    Returns:
      A parsed bucket information dictionary.
    Raises:
      Exception if there is an error performing the operation.
    """
    args = {'projection': projection}
    url = Api._ENDPOINT + (Api._BUCKET_PATH % bucket)
    return datalab.utils.Http.request(url, credentials=self._credentials, args=args)