code: def filter_df(self, df: pd.DataFrame) -> pd.DataFrame:
      if "Código" in df.columns:
          return df.loc[:, ["Código"]].copy()
  
imports: from functools import partial
  import sys
  from pathlib import Path
  import datetime
  import fire
  import pandas
  from tqdm import tqdm
  from loguru import logger
  from data_collector.index import IndexBase
  from data_collector.utils import get_instruments
label_desc: Use image node_id 9 for calling the IBOVIndex obj's underlying member method code with example usage: obj.filter_df(df) and returns: df