Update app.py

app.py

@@ -6,7 +6,7 @@ from pathlib import Path
 from typing import Dict, List, Optional, Any
 from datetime import datetime
 from threading import Lock
-pythonCopyfrom typing import Dict, Any, Optional
+from typing import Dict, Any, Optional
 from dataclasses import dataclass
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.vectorstores import FAISS