code: def default_preprocessing(df):
      """Perform the same preprocessing as the original analysis:
      https://github.com/propublica/compas-analysis/blob/master/Compas%20Analysis.ipynb
      """
      return df[
          (df.days_b_screening_arrest <= 30)
          & (df.days_b_screening_arrest >= -30)
          & (df.is_recid != -1)
          & (df.c_charge_degree != "O")
          & (df.score_text != "N/A")
      ]
  
imports: import os
  import pandas
  from aif360.datasets import StandardDataset
label_desc: Use image node_id 1 for calling a global function with example usage: default_preprocessing(df) and returns: df