Fixed mypy for utils/migration.py.

openslides/utils/migrations.py

@@ -1,8 +1,15 @@
+from typing import Any, Callable  # noqa
+
 from django.contrib.auth.models import Permission
 from django.contrib.contenttypes.models import ContentType
 
 
-def add_permission_to_groups_based_on_existing_permission(codename, model, app_label, new_codename, new_name):
+def add_permission_to_groups_based_on_existing_permission(
+        codename: str,
+        model: str,
+        app_label: str,
+        new_codename: str,
+        new_name: str) -> Callable[[Any, Any], None]:
     """
     Creates the new permission given by new_codename and new_name to all groups,
     that have the base permission. This base permission is given by codename, model
@@ -11,7 +18,7 @@ def add_permission_to_groups_based_on_existing_permission(codename, model, app_l
     exist, so this does not run for a fresh database.
     """
 
-    def function(apps, schema_editor):
+    def function(apps: Any, schema_editor: Any) -> None:
         content_type = ContentType.objects.filter(model=model, app_label=app_label)
         base_perm = Permission.objects.filter(codename=codename, content_type=content_type)