code: def tmp_dir():
      with tempfile.TemporaryDirectory() as tmp_dir:
          old_dir = os.getcwd()
          os.chdir(tmp_dir)
          yield tmp_dir
          os.chdir(old_dir)
  
imports: import os
  import random
  import subprocess
  import tempfile
  import pytest
  import requests
  import ray
  from ray import serve
  from ray._private.test_utils import wait_for_condition
  from ray._private.usage import usage_lib
  from ray.cluster_utils import AutoscalingCluster, Cluster
  from ray.serve._private import api
  from ray.serve._private.test_utils import TELEMETRY_ROUTE_PREFIX, check_ray_stopped
  from ray.serve.context import _get_global_client
  from ray.tests.conftest import propagate_logs, pytest_runtest_makereport
label_desc: Use image node_id 5 for calling a global function with example usage: tmp_dir() without return types