Update app.py

app.py

@@ -9,6 +9,7 @@ from qdrant_client import QdrantClient, models
 from langchain_qdrant import Qdrant
 from langchain_qdrant import QdrantVectorStore
 from langchain_huggingface import ChatHuggingFace
+from langchain_openai import ChatOpenAI ,OpenAI
 
 
 # Load environment variables