code: def is_apex_available():
      """
      Check if apex is available with simple python imports.
      """
      try:
          import apex  # NOQA
  
          apex_available = True
      except ImportError:
          apex_available = False
      return apex_available
  
imports: import collections
  import collections.abc
  import logging
  import os
  import random
  import sys
  import tempfile
  import time
  from functools import partial, wraps
  from typing import Tuple
  import numpy
  import pkg_resources
  import torch
  import torch.multiprocessing
  from iopath.common.file_io import g_pathmgr
  from scipy.sparse import csr_matrix
  from vissl.utils.extract_features_utils import ExtractedFeaturesLoader
label_desc: Use image node_id 4 for calling a global function with example usage: is_apex_available() and returns: apex_available