code: def testIsCommutativeExtra(self):
      try:
          MPI.SUM.Is_commutative()
      except NotImplementedError:
          self.skipTest("mpi-op-is_commutative")
      ops = [MPI.REPLACE, MPI.NO_OP]
      for op in ops:
          if not op:
              continue
          flag = op.Is_commutative()
          self.assertEqual(flag, op.is_commutative)
  
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 9 for calling the TestOp obj's underlying member method code with example usage: obj.testIsCommutativeExtra() without return types