docstr: Applies model-specific preprocessing to a dataframe.
docstr_tok: ["Applies","model-specific","preprocessing","to","a","dataframe","."]
code: def _preprocess_df(self, df: pd.DataFrame) -> pd.DataFrame:
      """Applies model-specific preprocessing to a dataframe."""
      return df
  
imports: from typing import List, Tuple, Dict, Union
  from abc import ABC, abstractmethod
  import torch
  import pandas
  import numpy
label_desc: Use image node_id 6 for calling the ABSATask obj's underlying member method code with example usage: obj._preprocess_df(df) and returns: df