Fix: Corrected import for ConversationBufferWindowMemory

app.py

@@ -4,7 +4,8 @@ from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
 import torch
 from pydantic import BaseModel
 import traceback
-from langchain.memory import ConversationBufferMemory
+#from langchain.memory import ConversationBufferMemory
+from langchain.memory import ConversationBufferWindowMemory
 from langchain.chains import ConversationChain
 from langchain_community.llms import HuggingFacePipeline