code: def testIDup(self):
      try:
          comm, request = self.COMM.Idup()
      except NotImplementedError:
          self.skipTest("mpi-comm-idup")
      request.Wait()
      ccmp = MPI.Comm.Compare(self.COMM, comm)
      comm.Free()
      self.assertEqual(ccmp, MPI.CONGRUENT)
  
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 11 for calling the BaseTestComm obj's underlying member method code with example usage: obj.testIDup() without return types