Update app.py

app.py

@@ -1,6 +1,12 @@
-import os
-from fastapi import FastAPI
-from pydantic import BaseModel
+import torch
+import asyncio
+import logging
+import signal
+import uvicorn
+import os 
+
+from fastapi import FastAPI, Request, HTTPException, status
+from pydantic import BaseModel, Field
 from langdetect import detect
 
 from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline, GenerationConfig
@@ -9,6 +15,9 @@ from langchain.embeddings import HuggingFaceEmbeddings
 from langchain.chains import RetrievalQA
 from langchain.llms import HuggingFacePipeline
 from qdrant_client import QdrantClient
+from langchain.callbacks.base import BaseCallbackHandler
+from huggingface_hub import hf_hub_download
+from contextlib import asynccontextmanager
 
 # Get environment variables
 QDRANT_API_KEY = os.getenv("QDRANT_API_KEY")