Update app.py

app.py

@@ -15,7 +15,7 @@ from pdf2image.exceptions import PDFInfoNotInstalledError
 from typing import Dict, TypedDict, Optional, Any
 from langgraph.graph import StateGraph, END
 import uuid
-import shutil, time
+import shutil, time, functools
 from langchain_experimental.open_clip.open_clip import OpenCLIPEmbeddings
 # from matplotlib.offsetbox import OffsetImage, AnnotationBbox
 from io import BytesIO