5804 Simplify the configparser usage to get parsed attributes easily

monai/bundle/config_parser.py

@@ -116,6 +116,16 @@ def __init__(
     def __repr__(self):
         return f"{self.config}"
 
+    def __getattr__(self, id):
+        """
+        Get the config by id.
+
+        Args:
+            id: id to specify the expected position. See also :py:meth:`__getitem__`.
+
+        """
+        return self.get_parsed_content(id)
+
     def __getitem__(self, id: Union[str, int]):
         """
         Get the config by id.

tests/test_config_parser.py

@@ -256,6 +256,22 @@ def test_pdb(self):
         with self.assertRaisesRegex(RuntimeError, ".*bdb.BdbQuit.*"):
             case_pdb()
 
+    def test_get_via_attributes(self):
+        config = {
+            "A": {"B": {"C": 1}},
+            "my_dims": 2,
+            "dims_1": "$@my_dims + 1",
+            "patch_size": [8, 8],
+            "transform": {"_target_": "Lambda", "func": "$lambda x: x.reshape((1, *@patch_size))"},
+        }
+        parser = ConfigParser(config=config)
+        self.assertEqual(parser.A, {"B": {"C": 1}})
+        self.assertEqual(parser.dims_1, 3)
+
+        trans = parser.transform
+        result = trans(np.ones(64))
+        self.assertTupleEqual(result.shape, (1, 8, 8))
+
 
 if __name__ == "__main__":
     unittest.main()