Update app.py

app.py

@@ -320,6 +320,7 @@ async def exe(websocket,connected,key):
     print('in exe')
     async for message in websocket:
         # Parse a "play" event from the UI.
+        print(message)
         event = json.loads(message)
         assert event["type"] == "cmd"
         # command = event["command"]