Fix the tutorial's user events

data/userevent.py

@@ -1,6 +1,9 @@
 import redis
 import json
 import threading
+import logging
+
+logger = logging.getLogger(__name__)
 
 class UserEventBuilder(object):
   """
@@ -68,8 +71,9 @@ class UserEvent(object):
     def conduct():
       try:
         self.publish_event_data_sync(event_id, data_obj)
-      except Exception as e:
-        print e
+        logger.debug('Published user event %s: %s', event_id, data_obj)
+      except Exception:
+        logger.exception('Could not publish user event')
 
     thread = threading.Thread(target=conduct)
     thread.start()