just go for it

ui/views.py

@@ -55,25 +55,18 @@ achievements = {
 def button(request):
     PRESSED = 'pressed'
     ACHIEVE = 'achievement'
-
-    try:
-        request.session[PRESSED]
-    except KeyError:
-        request.session[PRESSED] = 0
+    current = request.session.get(PRESSED, 0)
+    request.session[PRESSED] = current + 1
 
     if request.method == "POST":
-        request.session[PRESSED] += 1
         response = {
-            PRESSED: request.session[PRESSED],
-            ACHIEVE: achievements.get(request.session[PRESSED])
+            PRESSED: current,
+            ACHIEVE: achievements.get(current)
         }
         return JsonResponse(response)
 
-    pressed = request.session[PRESSED]
+    pressed = current
     response = {PRESSED: pressed}
     achieved = {k:v for k,v in achievements.items() if k <= pressed}
     response.update({ACHIEVE: achieved})
-    return render(request, "ui/button.html", response)
-
-def smooth(request):
-    return render(request, "ui/smooth.html")
+    return render(request, "ui/button.html", response)