Update run.py

run.py

@@ -30,7 +30,7 @@ def respond(message, chat_history, visible_elemIDs):
   previous_state = internal_state
   internal_state = message
   visible_elemIDs= [e for e in visible_elemIDs 
-    if ((str(e) != str(internal_state))|(str(e)=="1")] # delete some buttons
+    if ((str(e) != str(internal_state))|(str(e)=="1"))] # delete some buttons
   bot_message = f"I was in state \"{previous_state}\" and am now in state \"{internal_state}\". please click another button."
   chat_history.append((message, bot_message))
   if(len(visible_elemIDs)==0):