diff --git a/_includes/demos/python.py b/_includes/demos/python.py
index 7bb28505d..32483ea05 100644
--- a/_includes/demos/python.py
+++ b/_includes/demos/python.py
@@ -1,3 +1,5 @@
+# install "websocket-client" (instead of "websocket") for using "websocket" package
+
 import websocket
 import json