diff --git a/boards/views/api.py b/boards/views/api.py
--- a/boards/views/api.py
+++ b/boards/views/api.py
@@ -12,6 +12,10 @@ from boards.views import _datetime_to_ep
 
 __author__ = 'neko259'
 
+PARAMETER_TRUNCATED = 'truncated'
+PARAMETER_TAG = 'tag'
+PARAMETER_OFFSET = 'offset'
+
 
 @transaction.atomic
 def api_get_threaddiff(request, thread_id, last_update_time):
@@ -86,10 +90,10 @@ def get_post(request, post_id):
     thread = post.thread_new
 
     context = RequestContext(request)
-    context["post"] = post
-    context["can_bump"] = thread.can_bump()
-    if "truncated" in request.GET:
-        context["truncated"] = True
+    context['post'] = post
+    context['can_bump'] = thread.can_bump()
+    if PARAMETER_TRUNCATED in request.GET:
+        context[PARAMETER_TRUNCATED] = True
 
     return render(request, 'boards/post.html', context)
 
@@ -101,16 +105,16 @@ def api_get_threads(request, count):
     tag, offset (from which thread to get results)
     """
 
-    if 'tag' in request.GET:
-        tag_name = request.GET['tag']
+    if PARAMETER_TAG in request.GET:
+        tag_name = request.GET[PARAMETER_TAG]
         if tag_name is not None:
             tag = get_object_or_404(Tag, name=tag_name)
             threads = tag.threads.filter(archived=False)
     else: 
         threads = Thread.objects.filter(archived=False)
 
-    if 'offset' in request.GET:
-        offset = request.GET['offset']
+    if PARAMETER_OFFSET in request.GET:
+        offset = request.GET[PARAMETER_OFFSET]
         offset = int(offset) if offset is not None else 0
     else:
         offset = 0