Update app.py

app.py

@@ -186,8 +186,8 @@ async def user_ask(state, chatbot1, chatbot2, textbox, character_name, character
         {"role": "user", "content": user_input}])
     state["history"][1].extend([
         {"role": "user", "content": user_input}])
-    #if len(state["history"])>20:
-        #state["history"] = state["history"][-20:]
+    if len(state["history"])>20:
+        state["history"] = state["history"][-20:]
     # Chat with bots
     bot1_response, bot2_response = await chat_with_bots(user_input, state, character_name, character_description, user_name)