towards supporting python 2 and 3

- use absolute_imports
- make use of six.moves
- use exec instead of execfile
- use list(dict) instead if dict.keys()

pandora/person/tasks.py

@@ -1,8 +1,10 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
+from __future__ import division, print_function, absolute_import
+
 from celery.task import task
 
-import models
+from . import models
 
 
 @task(ignore_results=True, queue='default')