code: def test_imap_timeout(pool_4_processes, use_iter):
      def f(args):
          index, wait_index, signal = args
          time.sleep(0.1 * random.random())
          if index == wait_index:
              ray.get(signal.wait.remote())
          return index
  
      wait_index = 23
      signal = SignalActor.remote()
      if use_iter:
          imap_iterable = iter(
              [(index, wait_index, signal) for index in range(100)]
          )
      else:
          imap_iterable = [
              (index, wait_index, signal) for index in range(100)
          ]
      result_iter = pool_4_processes.imap(f, imap_iterable)
      for i in range(100):
          if i == wait_index:
              with pytest.raises(TimeoutError):
                  result = result_iter.next(timeout=0.1)
              ray.get(signal.send.remote())
  
          result = result_iter.next()
          assert result == i
  
      with pytest.raises(StopIteration):
          result_iter.next()
  
      wait_index = 23
      signal = SignalActor.remote()
      if use_iter:
          imap_iterable = iter(
              [(index, wait_index, signal) for index in range(100)]
          )
      else:
          imap_iterable = [
              (index, wait_index, signal) for index in range(100)
          ]
      result_iter = pool_4_processes.imap_unordered(
          f, imap_iterable, chunksize=11
      )
      in_order = []
      for i in range(100):
          try:
              result = result_iter.next(timeout=1)
          except TimeoutError:
              ray.get(signal.send.remote())
              result = result_iter.next()
  
          in_order.append(result == i)
  
      # Check that the results didn't come back all in order.
      # NOTE: this could be flaky if the calls happened to finish in order due
      # to the random sleeps, but it's very unlikely.
      assert not all(in_order)
  
      with pytest.raises(StopIteration):
          result_iter.next()
  
imports: import os
  import sys
  import platform
  import pytest
  import tempfile
  import time
  import random
  from collections import defaultdict
  import queue
  import math
  import ray
  from ray._private.test_utils import SignalActor
  from ray.util.multiprocessing import Pool, TimeoutError, JoinableQueue
  from ray.util.joblib import register_ray
  from joblib import parallel_backend, Parallel, delayed
label_desc: Use image node_id 22 for calling a global function with example usage: test_imap_timeout(pool_4_processes, use_iter) and returns: index