code: def _worker(
      index, env_fn, pipe, parent_pipe, shared_memory, error_queue
  ):
      assert shared_memory is None
      env = env_fn()
      parent_pipe.close()
      try:
          while True:
              command, data = pipe.recv()
              if command == "reset":
                  observation, info = env.reset(**data)
                  pipe.send(((observation, info), True))
  
              elif command == "step":
                  (
                      observation,
                      reward,
                      terminated,
                      truncated,
                      info,
                  ) = env.step(data)
                  if terminated or truncated:
                      old_observation, old_info = observation, info
                      observation, info = env.reset()
                      info["final_observation"] = old_observation
                      info["final_info"] = old_info
                  pipe.send(
                      (
                          (
                              observation,
                              reward,
                              terminated,
                              truncated,
                              info,
                          ),
                          True,
                      )
                  )
              elif command == "seed":
                  env.seed(data)
                  pipe.send((None, True))
              elif command == "close":
                  pipe.send((None, True))
                  break
              elif command == "_call":
                  name, args, kwargs = data
                  if name in ["reset", "step", "seed", "close"]:
                      raise ValueError(
                          f"Trying to call function `{name}` with "
                          f"`_call`. Use `{name}` directly instead."
                      )
                  function = getattr(env, name)
                  if callable(function):
                      pipe.send((function(*args, **kwargs), True))
                  else:
                      pipe.send((function, True))
              elif command == "_setattr":
                  name, value = data
                  setattr(env, name, value)
                  pipe.send((None, True))
              elif command == "_check_spaces":
                  pipe.send(
                      (
                          (
                              data[0] == env.observation_space,
                              data[1] == env.action_space,
                          ),
                          True,
                      )
                  )
              else:
                  raise RuntimeError(
                      f"Received unknown command `{command}`. Must "
                      "be one of {`reset`, `step`, `seed`, `close`, `_call`, "
                      "`_setattr`, `_check_spaces`}."
                  )
      except (KeyboardInterrupt, Exception):
          error_queue.put((index,) + sys.exc_info()[:2])
          pipe.send((None, False))
      finally:
          env.close()
  
imports: import multiprocessing
  import sys
  import time
  from copy import deepcopy
  from enum import Enum
  from typing import List, Optional, Sequence, Tuple, Union
  import numpy
  import gym
  from gym import logger
  from gym.core import ObsType
  from gym.error import AlreadyPendingCallError, ClosedEnvironmentError, CustomSpaceError, NoAsyncCallError
  from gym.vector.utils import CloudpickleWrapper, clear_mpi_env_vars, concatenate, create_empty_array, create_shared_memory, iterate, read_from_shared_memory, write_to_shared_memory
  from gym.vector.vector_env import VectorEnv
label_desc: Use image node_id 1 for calling a global function with example usage: _worker(index, env_fn, pipe, parent_pipe, shared_memory, error_queue) without return types