Sort imports

aleksis/apps/alsijil/model_extensions.py

 from datetime import date
-from calendarweek import CalendarWeek
 
 from django.db.models import Exists, F, OuterRef
 
+from calendarweek import CalendarWeek
+
 from aleksis.apps.chronos.models import LessonPeriod
 from aleksis.core.models import Group, Person
 

aleksis/apps/alsijil/views.py

-from calendarweek import CalendarWeek
 from datetime import date, datetime, timedelta
 from typing import Optional
 
@@ -10,6 +9,7 @@ from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
 from django.utils.translation import ugettext as _
 
+from calendarweek import CalendarWeek
 from django_tables2 import RequestConfig
 
 from aleksis.apps.chronos.models import LessonPeriod