code: def main(args: Namespace, cfg: AttrDict):
      setup_logging(__name__, output_dir=get_checkpoint_folder(cfg))
  
      # Extract the features if the feature extract is enabled
      if cfg.CLUSTERFIT.FEATURES.EXTRACT:
          # We cannot have automatic extraction with more than 1 node or otherwise
          # we would have to run this script on several nodes and thus have several
          # parallel clustering of the features. The automatic extraction is only
          # there as a shortcut when running on a single node
          assert (
              cfg.DISTRIBUTED.NUM_NODES == 1
          ), "Automatic extraction can only work with 1 node"
  
          # Make sure to dump the features at the desired path
          cfg.CHECKPOINT.DIR = cfg.CLUSTERFIT.FEATURES.PATH
          cfg.CHECKPOINT.APPEND_DISTR_RUN_ID = False
  
          # Run the extraction of features
          set_env_vars(local_rank=0, node_id=0, cfg=cfg)
          logging.info("Setting seed....")
          set_seeds(cfg, args.node_id)
          launch_distributed(
              cfg,
              args.node_id,
              engine_name="extract_features",
              hook_generator=default_hook_generator,
          )
  
      # Else setup the path manager (done in set_env_vars) in
      # case of feature extraction above
      else:
          setup_path_manager()
  
      cluster_features(cfg)
      shutdown_logging()
  
imports: import logging
  import os
  import sys
  from argparse import Namespace
  from typing import Any, List, Optional
  import numpy
  import torch
  from iopath.common.file_io import g_pathmgr
  from vissl.config import AttrDict
  from vissl.data import build_dataset
  from vissl.hooks import default_hook_generator
  from vissl.utils.checkpoint import get_checkpoint_folder
  from vissl.utils.distributed_launcher import launch_distributed
  from vissl.utils.env import set_env_vars, setup_path_manager
  from vissl.utils.extract_features_utils import ExtractedFeaturesLoader
  from vissl.utils.hydra_config import compose_hydra_configuration, convert_to_attrdict
  from vissl.utils.io import save_file
  from vissl.utils.logger import setup_logging, shutdown_logging
  from vissl.utils.misc import is_faiss_available, set_seeds
  from vissl.utils.pca import PCA
label_desc: Use image node_id 5 for calling a global function with example usage: main(args, cfg) without return types