code: def test_split_col_not_included_in_variables(df):
      """Check that the split columns is not included among the features
      to evaluate when these are selected automatically."""
      transformer = DropHighPSIFeatures(
          split_col="var_3", variables=None
      )
      transformer.fit(df)
  
      assert transformer.variables is None
      assert "var_3" not in transformer.variables_
      assert "var_3" not in transformer.psi_values_.keys()
  
imports: from datetime import date
  import math
  import numpy
  import pandas
  import pytest
  from sklearn.datasets import make_classification
  from feature_engine.selection import DropHighPSIFeatures
label_desc: Use image node_id 8 for calling a global function with example usage: test_split_col_not_included_in_variables(df) without return types