code: def code_download_func(dst_dir):
      with open(os.path.join(dst_dir, "train.py"), "w") as f:
          f.write(fixture_open("train.py").read())
      with open(os.path.join(dst_dir, "requirements.txt"), "w") as f:
          f.write(fixture_open("requirements.txt").read())
      with open(os.path.join(dst_dir, "patch.txt"), "w") as f:
          f.write("testing")
  
imports: import json
  import multiprocessing.pool
  import os
  import sys
  from unittest import mock
  from unittest.mock import MagicMock
  import pytest
  import wandb
  import wandb.sdk.launch._launch
  import wandb.sdk.launch._project_spec
  import yaml
  from wandb.apis import PublicApi
  from wandb.sdk.launch.agent.agent import LaunchAgent
  from wandb.sdk.launch.builder.build import _inject_wandb_config_env_vars
  from wandb.sdk.launch.builder.docker_builder import DockerBuilder
  from wandb.sdk.launch.errors import LaunchError
  from wandb.sdk.launch.utils import LAUNCH_DEFAULT_PROJECT, PROJECT_SYNCHRONOUS, pull_docker_image
  from wandb.sdk.lib import runid
  from tests.pytest_tests.unit_tests_old.utils import fixture_open, notebook_path
label_desc: Use image node_id 8 for calling a global function with example usage: code_download_func(dst_dir) without return types