code: def one_p_mnist():
      data_path = os.path.join(DATA_DIR, "one_p_mnist", "mnist.pkl.gz")
      with gzip.open(data_path, "rb") as f:
          training_set, _, _ = pickle.load(f, encoding="latin1")
  
      return training_set
  
imports: from __future__ import absolute_import
  import gzip
  import os
  import pickle
  from tests.integ import DATA_DIR
label_desc: Use image node_id 1 for calling a global function with example usage: one_p_mnist() and returns: training_set