Update app.py

app.py

@@ -1,15 +1,14 @@
-from transformers import AutoModelForCausalLM, AutoTokenizer
-import gradio as gr
-import torch
-
-import gradio as gr
-
 from langchain import hub
 from langchain.agents import AgentExecutor, create_openai_tools_agent, load_tools
 from langchain_openai import ChatOpenAI
 from gradio import ChatMessage
 import gradio as gr
 
+from langchain_community.llms import HuggingFaceEndpoint
+from langchain_community.chat_models.huggingface import ChatHuggingFace
+
+from transformers import BitsAndBytesConfig
+
 from dotenv import load_dotenv
 
 load_dotenv()