Update app.py

app.py

@@ -7,7 +7,7 @@ import time
 import pandas as pd
 from datetime import datetime
 from typing import List, Dict, Any, Annotated, Optional
-from langgraph.graph import Graph, StateGraph
+from langgraph.graph import Graph, StateGraph, END
 from typing_extensions import TypedDict
 from openai import OpenAI
 from tools import simple_search
@@ -487,7 +487,7 @@ QUESTION:
         
         # Add edges from each processing node to END
         for node in ["process_image", "process_video", "process_spreadsheet", "process_python", "process_text"]:
-            sg.add_edge(node, "END")
+            sg.add_edge(node, END)
             
         return sg.compile()