Method test_map_nested

tests/test_arrow_dataset.py:1399–1405

(self, in_memory)

                    assert_arrow_metadata_are_synced_with_dataset_features(dset_test_modifying_inputs_inplace)

    def test_map_nested(self, in_memory):
        with tempfile.TemporaryDirectory() as tmp_dir:
            with Dataset.from_dict({"field": ["a", "b"]}) as dset:
                with self._to(in_memory, tmp_dir, dset) as dset:
                    with dset.map(lambda example: {"otherfield": {"capital": example["field"].capitalize()}}) as dset:
                        with dset.map(lambda example: {"otherfield": {"append_x": example["field"] + "x"}}) as dset:
                            self.assertEqual(dset[0], {"field": "a", "otherfield": {"append_x": "ax"}})

    def test_map_return_example_as_dict_value(self, in_memory):
        with tempfile.TemporaryDirectory() as tmp_dir: