code: def refresh_remote_index():
      click.echo("Retrieving remote index... ", nl=False)
      remote = fetch_remote_index()
      click.echo("done.")
  
      db = read_checkpoint_db()
      db = merge_index(db, remote)
  
      save_checkpoint_db(db)
  
      return db
  
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 13 for calling a global function with example usage: refresh_remote_index() and returns: db