code: def write_dataframe(self, df, path, format='csv'):
          
          from ibis.impala.pandas_interop import DataFrameWriter
  
          writer = DataFrameWriter(self, df)
          return writer.write_csv(path)
docs: 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)