Adding a filter that returns the app_label of an object.

basic/tools/templatetags/comparison.py

@@ -3,21 +3,36 @@
 
 register = Library()
 
+
 @register.filter
 def is_content_type(obj, arg):
     try:
         ct = lower(obj._meta.object_name)
         return ct == arg
     except AttributeError:
-        return ""
+        return ''
+
+
+@register.filter
+def app_label(obj):
+    """
+    Returns an objects app label.
+    """
+    try:
+        return lower(obj._meta.object_name)
+    except AttributeError:
+        return ''
+
 
 @register.filter
 def round(obj):
-    "Returns a number rounded."
+    """
+    Returns a number rounded.
+    """
     try:
         return round(obj)
     except (ValueError,TypeError):
-        return ""
+        return ''
 
 
 @register.filter
@@ -36,6 +51,6 @@ def get_vars(obj):
     if 'page' in obj:
         del getvars['page']
     if len(getvars.keys()) > 0:
-        return "&%s" % getvars.urlencode()
+        return '&%s' % getvars.urlencode()
     else:
         return ''