From e5a05d57f70fa413bf551fde9d487976141a755a Mon Sep 17 00:00:00 2001
From: Nico <nicolas.jouanin@gmail.com>
Date: Fri, 6 Nov 2015 21:10:17 +0100
Subject: [PATCH] Fix exception when -q is not given

---
 scripts/sub_script.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/sub_script.py b/scripts/sub_script.py
index 7c3ab24..92a7e34 100644
--- a/scripts/sub_script.py
+++ b/scripts/sub_script.py
@@ -38,6 +38,7 @@ from hbmqtt.client import MQTTClient, ConnectException
 from hbmqtt.errors import MQTTException
 from hbmqtt.version import get_version
 from docopt import docopt
+from hbmqtt.mqtt.constants import QOS_0
 try:
     from .utils import read_yaml_config
 except:
@@ -58,7 +59,7 @@ def _get_qos(arguments):
     try:
         return int(arguments['--qos'][0])
     except:
-        return None
+        return QOS_0
 
 
 @asyncio.coroutine