code: def is_hydra_available():
      """
      Check if Hydra is available. Simply python import to test.
      """
      try:
          import hydra  # NOQA
  
          hydra_available = True
      except ImportError:
          hydra_available = False
      return hydra_available
  
imports: import contextlib
  import copy
  import logging
  import math
  import os
  import pprint
  import re
  import sys
  from typing import Any, List, NamedTuple, Tuple
  import torch
  from hydra.core.override_parser.overrides_parser import OverridesParser
  from omegaconf import DictConfig, OmegaConf, open_dict
  from vissl.config import AttrDict, check_cfg_version
  from vissl.utils.io import save_file
  from vissl.utils.misc import is_augly_available
label_desc: Use image node_id 4 for calling a global function with example usage: is_hydra_available() and returns: hydra_available