Fix #4996. Don't use assert_never to support Python 3.10.

src/blenderbim/blenderbim/bim/module/model/product.py

@@ -39,7 +39,7 @@ from blenderbim.bim.module.model.data import AuthoringData
 from mathutils import Vector, Matrix
 from bpy_extras.object_utils import AddObjectHelper
 import json
-from typing import Any, Union, Optional, assert_never
+from typing import Any, Union, Optional
 
 
 class EnableAddType(bpy.types.Operator, tool.Ifc.Operator):

src/blenderbim/blenderbim/tool/material.py

@@ -27,7 +27,7 @@ import blenderbim.bim.helper
 import ifcopenshell.util.unit
 import ifcopenshell.util.element
 from collections import defaultdict
-from typing import Union, Any, TYPE_CHECKING, Optional, assert_never
+from typing import Union, Any, TYPE_CHECKING, Optional
 
 if TYPE_CHECKING:
     # Avoid circular imports.
@@ -341,7 +341,7 @@ class Material(blenderbim.core.tool.Material):
             elif material_type == "IfcMaterialList":
                 assert False, "Current assign_material implementation requires 'material' argument for IfcMaterialList."
             else:
-                assert_never(material_type)
+                assert False, f"Invalid material type found: {material_type}"
 
         for element in elements[:]:
             if element.is_a("IfcElementType"):

src/blenderbim/blenderbim/tool/style.py

@@ -25,7 +25,7 @@ import blenderbim.core.tool
 import blenderbim.tool as tool
 import blenderbim.bim.helper
 from mathutils import Color
-from typing import Union, Any, Optional, Literal, assert_never
+from typing import Union, Any, Optional, Literal
 
 # fmt: off
 TEXTURE_MAPS_BY_METHODS = {
@@ -662,7 +662,7 @@ class Style(blenderbim.core.tool.Style):
             if rendering_style and texture_style:
                 tool.Loader.create_surface_style_with_textures(blender_material, rendering_style, texture_style)
         else:
-            assert_never(style_type)
+            assert False, f"Invalid style type found: {style_type}"
 
     @classmethod
     def rename_style(cls, style: ifcopenshell.entity_instance, name: str) -> None: