--- a/pvl/web/urls.py	Sun Jan 20 19:52:41 2013 +0200
+++ b/pvl/web/urls.py	Sun Jan 20 22:46:17 2013 +0200
@@ -1,5 +1,8 @@
 from werkzeug.routing import Map, Rule
 
+# url_join
+from os.path import join 
+
 def rule (string, endpoint, **opts) :
     return Rule(string, endpoint=endpoint, defaults=opts)