Port to Django 2.2 (for Debian 11 Bullseye)

pt/views.py

@@ -1,7 +1,7 @@
 import logging
 import random
 
-from django.core.urlresolvers import reverse
+from django.urls              import reverse
 from django.db.models         import Max
 from django.http              import HttpResponse, HttpResponseRedirect
 from django.shortcuts         import render