code: def testAttrDeleteException(self):
      cls, obj = type(self.obj), self.obj
      if not isinstance(obj, MPI.Win):
          return  # TODO: review
      raise_flag = True
  
      def delete_fn(o, k, v):
          if raise_flag:
              raise ValueError
  
      self.keyval = cls.Create_keyval(None, delete_fn)
      obj.Set_attr(self.keyval, "value")
      with self.assertRaises(MPI.Exception) as exc_cm:
          with unittest.capture_stderr() as stderr:
              obj.Delete_attr(self.keyval)
      ierr = exc_cm.exception.Get_error_code()
      self.assertEqual(ierr, MPI.ERR_OTHER)
      self.assertIn("ValueError", stderr.getvalue())
      raise_flag = False
      obj.Delete_attr(self.keyval)
  
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 10 for calling the BaseTestAttr obj's underlying member method code with example usage: obj.testAttrDeleteException() without return types