code: def toy_data_reader():
      return Reader(
          line_format="user item rating",
          sep=" ",
          skip_lines=3,
          rating_scale=(1, 5),
      )
  
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 1 for calling a global function with example usage: toy_data_reader() and returns: Reader