scripts/startup/bl_ui/space_text.py

@@ -278,12 +278,17 @@ class TEXT_MT_text(Menu):
 class TEXT_MT_templates_py(Menu):
     bl_label = "Python"
 
-    def draw(self, _context):
+    def draw(self, context):
+        prefs = context.preferences
+        use_asset_shelf = prefs.experimental.use_asset_shelf
+
         self.path_menu(
             bpy.utils.script_paths(subdir="templates_py"),
             "text.open",
             props_default={"internal": True},
             filter_ext=lambda ext: (ext.lower() == ".py"),
+            filter_path=lambda path, use_asset_shelf=use_asset_shelf:
+                (use_asset_shelf or not path.endswith("ui_asset_shelf.py")),
         )
 
 

scripts/templates_py/ui_asset_shelf.py

@@ -0,0 +1,26 @@
+import bpy
+
+
+class MyAssetShelf(bpy.types.AssetShelf):
+    bl_space_type = 'VIEW_3D'
+    bl_idname = "my_template.my_material_asset_shelf"
+
+    @classmethod
+    def poll(cls, context):
+        return bool(context.object and context.object.mode == 'OBJECT')
+
+    @classmethod
+    def asset_poll__(cls, asset):
+        return asset.file_data.id_type in {'MATERIAL', 'OBJECT'}
+
+
+def register():
+    bpy.utils.register_class(MyAssetShelf)
+
+
+def unregister():
+    bpy.utils.unregister_class(MyAssetShelf)
+
+
+if __name__ == "__main__":
+    register()