code: def _make_df(rows):
      
  
      # Make DataFrame
      df = pd.DataFrame(rows).set_index('ts')
  
      # TimeDelta Support: https://issues.apache.org/jira/browse/ARROW-835
      for column in df.columns:
          if(df[column].dtype == 'timedelta64[ns]'):
              print('Converting timedelta column {:s}...'.format(column))
              df[column] = df[column].astype(str)
      return df
docs: Internal Method to make and clean the dataframe in preparation for sending to Parquet