diff --git a/www/conservancy/apps/blog/views.py b/www/conservancy/apps/blog/views.py
index 86867de56c9c93a72bcef31edc46697335a07088..77b9eb30d1691d18e8135d57028db3f2ca958c8a 100644
--- a/www/conservancy/apps/blog/views.py
+++ b/www/conservancy/apps/blog/views.py
@@ -6,6 +6,7 @@ from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 from conservancy.apps.staff.models import Person
 from django.shortcuts import get_object_or_404, render
 from datetime import datetime
+from functools import reduce
 
 def OR_filter(field_name, objs):
     from django.db.models import Q
diff --git a/www/conservancy/apps/events/views.py b/www/conservancy/apps/events/views.py
index c01d283e4f9c74b779511cfc6845d6cee43403f4..b04254c88df4cab2c044a815c6caa9874fd369df 100644
--- a/www/conservancy/apps/events/views.py
+++ b/www/conservancy/apps/events/views.py
@@ -19,7 +19,7 @@ def event_detail(request, year, slug, queryset, **kwargs):
     try:
         event = queryset.get(date__year=year, slug__exact=slug)
     except ObjectDoesNotExist:
-        raise Http404, "Event does not exist"
+        raise Http404("Event does not exist")
     return render(request, 'events/event_detail.html', {'event': event})
 
 def custom_index(request, queryset, *args, **kwargs):
@@ -27,7 +27,7 @@ def custom_index(request, queryset, *args, **kwargs):
     """
 
     future_events = None
-    if not request.GET.has_key("page"):
+    if "page" not in request.GET:
         future_events = Event.future.all().order_by("date")
 
     date_list = queryset.dates(kwargs['date_field'], 'year')
diff --git a/www/conservancy/feeds.py b/www/conservancy/feeds.py
index 9e30db8bee80e450273272b1b96ece16f835ba91..698e41d1aeef014a13da4f191fbb50d755714943 100644
--- a/www/conservancy/feeds.py
+++ b/www/conservancy/feeds.py
@@ -8,6 +8,7 @@ from datetime import datetime
 
 import itertools
 import operator
+from functools import reduce
 
 class ConservancyFeedBase(Feed):
     def copyright_holder(self): return "Software Freedom Conservancy"
@@ -171,7 +172,7 @@ class BlogFeed(ConservancyFeedBase):
             firstTime = True
             done = {}
             for tag in tags:
-                if done.has_key(tag): continue
+                if tag in done: continue
                 if firstTime:
                     answer += " ("
                     firstTime = False
@@ -198,7 +199,7 @@ class BlogFeed(ConservancyFeedBase):
         elif len(tags) > 1:
             firstTime = True
             for tag in tags:
-                if done.has_key(tag): continue
+                if tag in done: continue
                 if firstTime:
                     answer += " tagged with "
                     firstTime = False
diff --git a/www/conservancy/middleware.py b/www/conservancy/middleware.py
index 8f714f5c28e8a04c4a8e40d5371c85bbb8750d73..cfb6eb38ff763b74fa07c3cac49c829eb7f26c3f 100644
--- a/www/conservancy/middleware.py
+++ b/www/conservancy/middleware.py
@@ -1,3 +1,4 @@
+from future.utils import raise_
 from django import http
 from django.conf import settings
 from django.utils.cache import patch_response_headers
@@ -27,13 +28,13 @@ class ForceCanonicalHostnameMiddleware(object):
         if settings.APPEND_SLASH and (old_url[1][-1] != '/') and ('.' not in old_url[1].split('/')[-1]):
             new_url[1] = new_url[1] + '/'
             if settings.DEBUG and request.method == 'POST':
-                raise RuntimeError, "You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH set. Django can't redirect to the slash URL while maintaining POST data. Change your form to point to %s%s (note the trailing slash), or set APPEND_SLASH=False in your Django settings." % (new_url[0], new_url[1])
+                raise_(RuntimeError, "You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH set. Django can't redirect to the slash URL while maintaining POST data. Change your form to point to %s%s (note the trailing slash), or set APPEND_SLASH=False in your Django settings." % (new_url[0], new_url[1]))
         # Strip trailing index.html
         if new_url[1].endswith('/index.html'):
             new_url[1] = new_url[1][:new_url[1].rfind('index.html')]
         # Consult redirect table (if exists)
         if hasattr(settings, "REDIRECT_TABLE"):
-            if settings.REDIRECT_TABLE.has_key(new_url[1]):
+            if new_url[1] in settings.REDIRECT_TABLE:
                 new_url[1] = settings.REDIRECT_TABLE[new_url[1]]
         if new_url != old_url:
             # Force canonical hostname
diff --git a/www/modpythoncustom.py b/www/modpythoncustom.py
index 80ad150ed890a3dca2a8d4b9c17ca94c051dc01a..f5e0a14e9641a9791df42ed79a93e976150e16d6 100644
--- a/www/modpythoncustom.py
+++ b/www/modpythoncustom.py
@@ -42,7 +42,7 @@ del handler
 
 class ModPythonRequest(ModPythonRequest):
     def is_secure(self):
-        return self._req.get_options().has_key('HTTPS') and self._req.get_options()['HTTPS'] == 'on'
+        return 'HTTPS' in self._req.get_options() and self._req.get_options()['HTTPS'] == 'on'
 
 class ModPythonHandler(BaseHandler):
     request_class = ModPythonRequest