hunk.code_window:         from ray.rllib.env.base_env import _DUMMY_AGENT_ID
           assert env_id is None or isinstance(env_id, int)
           return {_DUMMY_AGENT_ID: self.vector_env.reset_at(env_id)}
       @override(BaseEnv)
       def get_sub_environments(self) -> List[EnvType]:
  
hunk.labels: keep keep replace keep keep keep
hunk.after_edit:         return {
               env_id if env_id is not None else 0: {
                   _DUMMY_AGENT_ID: self.vector_env.reset_at(env_id)
               }
           }
  
hunk.file_path: rllib/env/vector_env.py
hunk.type: replace
file: from pathlib import Path
  import importlib.util
  import ray
  import time
  
  
  def import_and_execute_test_script(relative_path_to_test_script: str):
      """Imports and executes a module from a path relative to Ray repo root."""
      # get the ray folder
      ray_path = next(
          x for x in Path(__file__).resolve().parents if str(x).endswith("/ray"))
      notebook_path = ray_path.joinpath(relative_path_to_test_script)
      assert notebook_path.exists()
  
      spec = importlib.util.spec_from_file_location("notebook_test",
                                                    notebook_path)
      notebook_test_module = importlib.util.module_from_spec(spec)
      spec.loader.exec_module(notebook_test_module)
  
  
  def wait_for_cluster_client(num_nodes: int,
                              max_time_s: int,
                              feedback_interval_s: int = 10):
      assert ray.is_initialized()
      curr_nodes = 0
      start = time.time()
      next_feedback = start
      max_time = start + max_time_s
      while not curr_nodes >= num_nodes:
          now = time.time()
  
          if now >= max_time:
              raise RuntimeError(
                  f"Maximum wait time reached, but only "
                  f"{curr_nodes}/{num_nodes} nodes came up. Aborting.")
  
          if now >= next_feedback:
              passed = now - start
              print(f"Waiting for more nodes to come up: "
                    f"{curr_nodes}/{num_nodes} "
                    f"({passed:.0f} seconds passed)")
              next_feedback = now + feedback_interval_s
  
          time.sleep(5)
          curr_nodes = len(ray.nodes())
  
      passed = time.time() - start
      print(f"Cluster is up: {curr_nodes}/{num_nodes} nodes online after "
            f"{passed:.0f} seconds")
  