Update app.py

app.py

@@ -7,9 +7,9 @@ from langchain.llms import OpenAI
 from gradio import gradio as gr
 from langchain.chat_models import ChatOpenAI
 from langchain.schema import AIMessage, HumanMessage
-
-
-
+from langchain.cache import InMemoryCache
+import langchain
+import time
 import os
 OPENAI_API_KEY=os.getenv('OPENAI_API_KEY')
 
@@ -44,7 +44,7 @@ def predict(message, history):
             partial_message = partial_message + chunk[0]
             yield partial_message    
 
-
+langchain.llm_cache = InMemoryCache()
 gr.ChatInterface(predict, theme=gr.themes.Default(),
                  textbox=gr.Textbox(placeholder="请输入您的问题...", container=False, scale=7),
     title="欢迎使用智造云AI机器人",