switch order of queue,value

preprocessor/preprocessor/daemon.py

@@ -20,7 +20,7 @@ def run_daemon(config, host, port, listen_queue, listen_md_queue, write_queue):
     logger.debug("waiting for redis queue '%s'..." % listen_queue)
     while True:
         # fetch an item from the queue to be preprocessed
-        value, queue = client.brpop([listen_queue, listen_md_queue])
+        queue, value = client.brpop([listen_queue, listen_md_queue])
         file_paths = []
         # start the preprocessing on that file
         if queue == listen_queue: