code: def test_env_hook_skipped_for_ray_client(start_cluster, monkeypatch):
      monkeypatch.setenv(
          "RAY_RUNTIME_ENV_HOOK", "ray.tests.test_output._hook"
      )
      cluster, address = start_cluster
      ray.init(address)
  
      @ray.remote
      def f():
          return os.environ.get("HOOK_KEY")
  
      using_ray_client = address.startswith("ray://")
      if using_ray_client:
          assert ray.get(f.remote()) is None
      else:
          assert ray.get(f.remote()) == "HOOK_VALUE"
  
imports: import os
  import re
  import signal
  import subprocess
  import sys
  import time
  import pytest
  import ray
  from ray._private.test_utils import run_string_as_driver, run_string_as_driver_nonblocking, wait_for_condition
label_desc: Use image node_id 7 for calling a global function with example usage: test_env_hook_skipped_for_ray_client(start_cluster, monkeypatch) and returns: os