code: def download_remote_checkpoint(db, checkpoint):
      # Check if output directory doesn't exist already to fail early.
      output = get_checkpoint_path(checkpoint["id"])
      if os.path.exists(output):
          click.echo(
              "Checkpoint directory '{}' for checkpoint_id '{}' already exists. "
              "Try issuing a `lumi checkpoint delete` or delete the directory "
              "manually.".format(output, checkpoint["id"])
          )
          return
  
      # Create a temporary directory to download the tar into.
      tempdir = tempfile.mkdtemp()
      path = os.path.join(tempdir, "{}.tar".format(checkpoint["id"]))
  
      # Start the actual tar file download.
      response = requests.get(checkpoint["url"], stream=True)
      length = int(response.headers.get("Content-Length"))
      chunk_size = 16 * 1024
      progressbar = click.progressbar(
          response.iter_content(chunk_size=chunk_size),
          length=length / chunk_size,
          label="Downloading checkpoint...",
      )
  
      with open(path, "wb") as f:
          with progressbar as content:
              for chunk in content:
                  f.write(chunk)
  
      # Import the checkpoint from the tar.
      click.echo("Importing checkpoint... ", nl=False)
      with tarfile.open(path) as f:
          members = [
              m for m in f.getmembers() if m.name != "metadata.json"
          ]
          f.extractall(output, members)
      click.echo("done.")
  
      # Update the checkpoint status and persist database.
      checkpoint["status"] = "DOWNLOADED"
      save_checkpoint_db(db)
  
      # And finally make sure to delete the temp dir.
      shutil.rmtree(tempdir)
  
      click.echo("Checkpoint imported successfully.")
  
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 14 for calling a global function with example usage: download_remote_checkpoint(db, checkpoint) without return types