diff --git a/tool.py b/tool.py
index d874330..9c7851d 100755
--- a/tool.py
+++ b/tool.py
@@ -33,7 +33,9 @@ def exec_sh(msg, client):
         client.publish('error', payload='data must be supplied', qos=0)
         return
     cmd = origin_data["data"]
-    if cmd == "supervisorctl stop __mqtt__" or cmd == "supervisorctl restart __mqtt__" or "supervisorctl stop all":
+    if cmd in ["supervisorctl stop __mqtt__",
+               "supervisorctl restart __mqtt__",
+               "supervisorctl stop all"]:
         return
     if cmd == "supervisorctl reload":
         client.publish('success', payload='reloading', qos=0)