code: def download_example_file(
      example_file: str,
      base_url: Optional[str] = "https://raw.githubusercontent.com/"
      + "ray-project/ray/master/rllib/",
  ):
      """Download the example file (e.g. from GitHub) if it doesn't exist locally.
      If the provided example file exists locally, we return it directly.
  
      Not every user will have cloned our repo and cd'ed into this working directory
      when using the CLI.
  
      Args:
          example_file: The example file to download.
          base_url: The base URL to download the example file from. Use this if
              'example_file' is a link relative to this base URL. If set to 'None',
              'example_file' is assumed to be a complete URL (or a local file, in which
              case nothing is downloaded).
      """
      temp_file = None
      if not os.path.exists(example_file):
          example_url = (
              base_url + example_file if base_url else example_file
          )
          print(
              f">>> Attempting to download example file {example_url}..."
          )
  
          file_type = get_file_type(example_url)
          if file_type == SupportedFileType.yaml:
              temp_file = tempfile.NamedTemporaryFile(suffix=".yaml")
          else:
              assert (
                  file_type == SupportedFileType.python
              ), f"`example_url` ({example_url}) must be a python or yaml file!"
              temp_file = tempfile.NamedTemporaryFile(suffix=".py")
  
          r = requests.get(example_url)
          with open(temp_file.name, "wb") as f:
              print(r.content)
              f.write(r.content)
  
          print(f"  Status code: {r.status_code}")
          if r.status_code == 200:
              print(f"  Downloaded example file to {temp_file.name}")
              # only overwrite the file if the download was successful
              example_file = temp_file.name
  
      return example_file, temp_file
  
imports: import argparse
  from dataclasses import dataclass
  from enum import Enum
  import os.path
  import tempfile
  import typer
  from typing import Optional
  import requests
  from ray.tune.experiment.config_parser import _make_parser
  from ray.tune.result import DEFAULT_RESULTS_DIR
label_desc: Use image node_id 3 for calling a global function with example usage: download_example_file(example_file, base_url) and returns: example_file,  temp_file