fix some sync error while using python3

Change-Id: I70925e48756c356d48359679d8ad1b9e33a68595
diff --git a/event_log.py b/event_log.py
index 45a2c26..2f1b180 100644
--- a/event_log.py
+++ b/event_log.py
@@ -18,6 +18,8 @@
 import json
 import multiprocessing
 
+from pyversion import is_python3
+
 TASK_COMMAND = 'command'
 TASK_SYNC_NETWORK = 'sync-network'
 TASK_SYNC_LOCAL = 'sync-local'
@@ -71,7 +73,7 @@
       A dictionary of the event added to the log.
     """
     event = {
-        'id': (kind, self._next_id.next()),
+        'id': (kind, self._next_id.__next__() if is_python3() else self._next_id.next()),
         'name': name,
         'task_name': task_name,
         'start_time': start,