code: def small_ml():
      """Return a Dataset object with 2000 movielens-100k ratings."""
      data_file = os.path.join(
          os.path.dirname(__file__), "./u1_ml100k_test"
      )
      data = Dataset.load_from_file(data_file, Reader("ml-100k"))
  
      return data
  
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 4 for calling a global function with example usage: small_ml() and returns: data