def test_subdataset(self):
        some_dataset_map = {
            column.name: column for column in SomeDataSet.columns
        }
        sub_dataset_map = {
            column.name: column for column in SubDataSet.columns
        }
        self.assertEqual(
            {column.name for column in SomeDataSet.columns},
            {column.name for column in SubDataSet.columns},
        )
        for k, some_dataset_column in some_dataset_map.items():
            sub_dataset_column = sub_dataset_map[k]
            self.assertIsNot(
                some_dataset_column,
                sub_dataset_column,
                'subclass column %r should not have the same identity as'
                ' the parent' / k,
            )
            self.assertEqual(
                some_dataset_column.dtype,
                sub_dataset_column.dtype,
                'subclass column %r should have the same dtype as the parent' %
                k,
            )
dataset/ETHPy150Open quantopian/zipline/tests/pipeline/test_term.py/SubDataSetTestCase.test_subdataset/operator `%` -> `/`