code: def thread_police_duuu_daaa_duuu_daaa():
      """Attempts to stop left-over threads to avoid test interactions."""
      active_threads_before = set(threading.enumerate())
      yield
      active_threads_after = set(threading.enumerate())
  
      if XLAAccelerator.is_available():
          # Ignore the check when running XLA tests for now
          return
  
      for thread in active_threads_after - active_threads_before:
          stop = getattr(thread, "stop", None) or getattr(
              thread, "exit", None
          )
          if thread.daemon and callable(stop):
              # A daemon thread would anyway be stopped at the end of a program
              # We do it preemptively here to reduce the risk of interactions with other tests that run after
              stop()
              assert not thread.is_alive()
          elif isinstance(thread, _ChildProcessObserver):
              thread.join(timeout=10)
          elif thread.name == "QueueFeederThread":  # tensorboardX
              thread.join(timeout=20)
          elif isinstance(thread, TMonitor):
              thread.exit()
          elif (
              sys.version_info >= (3, 9)
              and isinstance(thread, _ExecutorManagerThread)
              or "ThreadPoolExecutor-" in thread.name
          ):
              # probably `torch.compile`, can't narrow it down further
              continue
          elif thread.name == "fsspecIO":
              continue
          else:
              raise AssertionError(f"Test left zombie thread: {thread}")
  
imports: import os
  import signal
  import sys
  import threading
  from functools import partial
  from http.server import SimpleHTTPRequestHandler
  from pathlib import Path
  from typing import List
  from unittest.mock import Mock
  import lightning.fabric
  import lightning.pytorch
  import pytest
  import torch.distributed
  from lightning.fabric.plugins.environments.lightning import find_free_network_port
  from lightning.fabric.strategies.launchers.subprocess_script import _ChildProcessObserver
  from lightning.fabric.utilities.distributed import _distributed_is_initialized
  from lightning.fabric.utilities.imports import _IS_WINDOWS
  from lightning.pytorch.accelerators import XLAAccelerator
  from lightning.pytorch.trainer.connectors.signal_connector import _SignalConnector
  from tqdm import TMonitor
  from tests_pytorch import _PATH_DATASETS
label_desc: Use image node_id 7 for calling a global function with example usage: thread_police_duuu_daaa_duuu_daaa() without return types