[PythonActor] simplify overwriting in_data

pypushflow/PythonActor.py

@@ -211,14 +211,12 @@ class PythonActor(AbstractActor):
         :param data: input data
         """
         channel, in_data = in_data
-        logging.info(' on trigger channel is', channel)
+        logging.info('On trigger channel is ' + str(channel))
         # cast data to dict if necessary
         if hasattr(in_data, 'to_dict'):
-            _in_data = in_data.to_dict()
-        else:
-            _in_data = in_data
+            in_data = in_data.to_dict()
 
-        self.in_data = _in_data
+        self.in_data = in_data
         logger.debug('In trigger {0}, inData = {1}'.format(self.name, pprint.pformat(in_data)))
         if isinstance(in_data, WorkflowException):
             logger.error('Error from previous actor! Not running actor {0}'.format(self.name))