code: def testCreateGroup(self):
      group = self.COMM.Get_group()
      try:
          comm = self.COMM.Create_group(group)
      except NotImplementedError:
          self.assertLess(MPI.VERSION, 3)
          self.skipTest("mpi-comm-create_group")
      else:
          ccmp = MPI.Comm.Compare(self.COMM, comm)
          comm.Free()
          self.assertEqual(ccmp, MPI.CONGRUENT)
      finally:
          group.Free()
  
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 15 for calling the BaseTestComm obj's underlying member method code with example usage: obj.testCreateGroup() without return types