code: def save_checkpoint_db(checkpoints):
      """Overwrites the database file in disk with `checkpoints`."""
      path = os.path.join(get_checkpoints_directory(), CHECKPOINT_INDEX)
      with open(path, "w") as f:
          json.dump(checkpoints, f)
  
imports: import click
  import json
  import os
  import shutil
  import six
  import requests
  import tarfile
  import tempfile
  import tensorflow
  import uuid
  from datetime import datetime
  from luminoth import __version__
  from luminoth.utils.config import get_config
  from luminoth.utils.homedir import get_luminoth_home
label_desc: Use image node_id 4 for calling a global function with example usage: save_checkpoint_db(checkpoints) without return types