Merge branch 'data_migrations' of gimli.ms.mff.cuni.cz:/akce/mam/git/mamweb into data_migrations

seminar/utils.py

@@ -12,6 +12,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ObjectDoesNotExist
 
 from enum import Enum
+from enum import auto
 
 import seminar.models as m
 import seminar.treelib as t