code: def pkf():
      return PredefinedKFold()
  
file_path: Surprise/tests/conftest.py
imports: import os
  import pytest
  from surprise import Dataset, Reader
  from surprise.model_selection import PredefinedKFold
label_desc: Use image node_id 5 for calling a global function with example usage: pkf() and returns: PredefinedKFold