Update app.py

app.py

@@ -22,7 +22,7 @@ import nltk
 from datetime import datetime
 
 import openai
-from langchain.llms import OpenAI
+from langchain.llms import OpenAI, Replicate
 
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.embeddings import HuggingFaceBgeEmbeddings