code: def load_transformers(save_dir: str) -> List["dc.trans.Transformer"]:
      """Load the transformers for a MoleculeNet dataset from disk."""
      with open(os.path.join(save_dir, "transformers.pkl"), "rb") as f:
          return pickle.load(f)
  
imports: import joblib
  import gzip
  import pickle
  import os
  import tempfile
  import tarfile
  import zipfile
  import logging
  from urllib.request import urlretrieve
  from typing import Any, Iterator, List, Optional, Tuple, Union, cast, IO
  import pandas
  import numpy
  import deepchem
label_desc: Use image node_id 18 for calling a global function with example usage: load_transformers(save_dir) and returns: pickle