fix tuple comparision

Author: jrief

examples/chatserver/urls.py

@@ -3,7 +3,7 @@
 if DJANGO_VERSION < (1, 10):
     from django.conf.urls import url, patterns, include
     from django.core.urlresolvers import reverse_lazy
-elif DJANGO_VERSION < 2:
+elif DJANGO_VERSION < (2,):
     from django.conf.urls import url, include
     from django.urls import reverse_lazy
 else: