Update app.py

app.py

@@ -100,7 +100,7 @@ def user_ask(state, chatbot1, chatbot2, textbox):
 
     # Update chat history in state
     if "history" not in state:
-        state.update({'history': [])
+        state.update({'history': []})
     state["history"].append([
         {"role": "bot1", "content": bot1_response},
         {"role": "bot2", "content": bot2_response}