entity_instance: get_info_2 falls back to get_info for unsupported args #4270

get_info_2 advertises the same signature as get_info but raised a bare
AssertionError for anything the C++ fast path does not implement --
including its own default arguments (recursive=False).

Use the fast path when recursive=True, return_type=dict and ignore=()
hold, and delegate to the pure Python get_info otherwise. As noted in
the issue, without recursion there is no meaningful performance gain to
lose by delegating.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/ifcopenshell-python/ifcopenshell/entity_instance.py

@@ -642,16 +642,16 @@ class entity_instance:
         return_type: type[dict] = dict,
         ignore: Sequence[str] = (),
     ) -> dict[str, Any]:
-        """More perfomant version of `.get_info()` but with limited arguments values.\n
+        """More perfomant version of `.get_info()`.\n
-        Method has exactly the same signature as `.get_info()` but it doesn't support getting information non-recursively.
+        Method has exactly the same signature as `.get_info()`, but the fast C++
-
+        path only implements ``recursive=True``, ``return_type=dict`` and
-        Currently supported arguments values:
+        ``ignore=()``. Any other combination falls back to the pure Python
-            * recursive: `True` (will fail with default `False` value from `.get_info()`)
+        `.get_info()`, where no meaningful performance gain is possible anyway
-            * return_type: `dict`
+        as the cost is dominated by the recursive traversal.
-            * ignore: `()` (empty tuple)
         """
 
-        assert recursive
+        if recursive and return_type is dict and not ignore:
-        assert return_type is dict
+            return ifcopenshell_wrapper.get_info_cpp(self.wrapped_data, include_identifier)
-        assert len(ignore) == 0
+        return self.get_info(
-        return ifcopenshell_wrapper.get_info_cpp(self.wrapped_data, include_identifier)
+            include_identifier=include_identifier, recursive=recursive, return_type=return_type, ignore=ignore
+        )

src/ifcopenshell-python/test/test_entity_instance.py

@@ -64,3 +64,14 @@ class TestGetInfo2(test.bootstrap.IFC4):
             "Outer": {"CfsFaces": None, "type": "IfcClosedShell"},
             "type": "IfcFacetedBrep",
         }
+
+    def test_unsupported_arguments_fall_back_to_get_info(self):
+        # Regression test for #4270: get_info_2 raised a bare AssertionError
+        # when called with its own default arguments (recursive=False) or any
+        # other combination the C++ fast path does not implement. It must
+        # delegate to get_info instead of crashing.
+        brep = self.file.create_entity("IfcFacetedBrep")
+        shell = self.file.create_entity("IfcClosedShell")
+        brep.Outer = shell
+        assert brep.get_info_2() == brep.get_info()
+        assert brep.get_info_2(recursive=True, ignore=("Outer",)) == brep.get_info(recursive=True, ignore=("Outer",))