fix assigning material usages / reloading reprs after c4ae9578e #4843

src/ifcopenshell-python/ifcopenshell/api/material/assign_material.py

@@ -27,7 +27,7 @@ from typing import Optional, Union
 def assign_material(
     file: ifcopenshell.file,
     products: list[ifcopenshell.entity_instance],
-    type: str = "IfcMaterial",
+    type: ifcopenshell.util.element.MATERIAL_TYPE = "IfcMaterial",
     material: Optional[ifcopenshell.entity_instance] = None,
 ) -> Union[ifcopenshell.entity_instance, list[ifcopenshell.entity_instance], None]:
     """Assigns a material to the list of products

src/ifcopenshell-python/ifcopenshell/util/element.py

@@ -23,6 +23,17 @@ from typing import Any, Callable, Optional, Union, Literal, overload
 from collections import namedtuple
 
 
+MATERIAL_TYPE = Literal[
+    "IfcMaterial",
+    "IfcMaterialConstituentSet",
+    "IfcMaterialLayerSet",
+    "IfcMaterialLayerSetUsage",
+    "IfcMaterialProfileSet",
+    "IfcMaterialProfileSetUsage",
+    "IfcMaterialList",
+]
+
+
 def get_pset(
     element: ifcopenshell.entity_instance,
     name: str,