code: def testThreadLevels(self):
      levels = [
          MPI.THREAD_SINGLE,
          MPI.THREAD_FUNNELED,
          MPI.THREAD_SERIALIZED,
          MPI.THREAD_MULTIPLE,
      ]
      for i in range(len(levels) - 1):
          self.assertLess(levels[i], levels[i + 1])
      try:
          provided = MPI.Query_thread()
          self.assertIn(provided, levels)
      except NotImplementedError:
          self.skipTest("mpi-query_thread")
  
file_path: mpi4py/test/test_threads.py
imports: import sys
  import mpi4py.rc
  from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the TestMPIThreads obj's underlying member method code with example usage: obj.testThreadLevels() without return types