Update app.py

app.py

@@ -90,6 +90,8 @@ def user_ask(state, chatbot1, chatbot2, textbox):
 
     # Updating state with the current ELO ratings
     state["elo_ratings"] = read_elo_ratings()
+    if "history" not in state:
+        state['history']=[]
     state["history"].extend([
         {"role": "user", "content": user_input}])
     # Chat with bots