def write_dataframe(self, df, path, format='csv'):
        """
        Write a pandas DataFrame to indicated file path (default: HDFS) in the
        indicated format

        Parameters
        ----------
        df : DataFrame
        path : string
          Absolute output path
        format : {'csv'}, default 'csv'

        Returns
        -------
        None (for now)
        """
        from ibis.impala.pandas_interop import DataFrameWriter

        writer = DataFrameWriter(self, df)
        return writer.write_csv(path)