code: def get_id_ratings(data_dir):
      movielens_data = read_data_sets(data_dir)
      return movielens_data[:, 0:3]
  
imports: import os
  import zipfile
  import numpy
  from bigdl.dllib.feature.dataset import base
label_desc: Use image node_id 3 for calling a global function with example usage: get_id_ratings(data_dir) and returns: movielens_data