code: def sleep_and_print(t, msg):
      time.sleep(t)
      print(msg)
      sys.stdout.flush()
  
imports: import signal
  import sys
  import threading
  import time
  import unittest
  from concurrent import futures
  from test import support
  from test.support.script_helper import assert_python_ok
  from .util import BaseTestCase, ThreadPoolMixin, ProcessPoolForkMixin, ProcessPoolForkserverMixin, ProcessPoolSpawnMixin, create_executor_tests, setup_module
label_desc: Use image node_id 1 for calling a global function with example usage: sleep_and_print(t, msg) without return types