code: def _read_file(filename):
      from os.path import dirname, join
  
      return pd.read_csv(
          join(dirname(__file__), filename),
          index_col=0,
          parse_dates=True,
          infer_datetime_format=True,
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: _read_file(filename) and returns: pd