INCR-377 python 3 compatibility

openedx/core/djangoapps/ccxcon/signals.py

@@ -1,6 +1,9 @@
 """
 Signal handler for posting course updated to CCXCon
 """
+from __future__ import absolute_import
+
+import six
 from django.dispatch.dispatcher import receiver
 
 from xmodule.modulestore.django import SignalHandler
@@ -15,4 +18,4 @@ def _listen_for_course_publish(sender, course_key, **kwargs):  # pylint: disable
     # update the course information on ccxcon using celery
     # import here, because signal is registered at startup, but items in tasks are not yet able to be loaded
     from openedx.core.djangoapps.ccxcon import tasks
-    tasks.update_ccxcon.delay(unicode(course_key))
+    tasks.update_ccxcon.delay(six.text_type(course_key))