Update app.py

app.py

@@ -4,11 +4,12 @@ from langchain.text_splitter import RecursiveCharacterTextSplitter
 import dotenv
 from langchain.prompts import PromptTemplate
 import gradio as gr
-from langchain import PromptTemplate, LLMChain
+from langchain import PromptTemplate, LLMChain,
 import requests
 from fastembed.embedding import FlagEmbedding as Embedding
 import numpy as np
 import os
+from langchain.schema.messages import HumanMessage
 
 
 dotenv.load_dotenv()