Update app.py

app.py

@@ -230,7 +230,7 @@ import boto3
 import os
 from langchain.llms import Bedrock
 from langchain.chains import ConversationChain
-#from langchain.memory import ConversationBufferWindowMemory
+from langchain.memory import ConversationBufferMemory
 from langchain.prompts.prompt import PromptTemplate
 access_key_id = os.environ['aws_access_key_id']
 secret_access_key = os.environ['aws_secret_access_key']