diff --git a/lib/py/src/server/TNonblockingServer.py b/lib/py/src/server/TNonblockingServer.py
index 67ee04e..26c0f7e 100644
--- a/lib/py/src/server/TNonblockingServer.py
+++ b/lib/py/src/server/TNonblockingServer.py
@@ -62,6 +62,7 @@
                 logger.exception("Exception while processing request", exc_info=True)
                 callback(False, b'')
 
+
 WAIT_LEN = 0
 WAIT_MESSAGE = 1
 WAIT_PROCESS = 2