Update app.py

app.py

@@ -4,8 +4,9 @@ import requests
 import inspect
 import pandas as pd
 import re
-from agentic import build_graph
+from agentic import build_graph, langfuse_handler
 from langchain_core.messages import HumanMessage
+from langfuse.callback import CallbackHandler
 
 # (Keep Constants as is)
 # --- Constants ---
@@ -22,7 +23,8 @@ class BasicAgent:
 
         messages = [HumanMessage(content=f"Can you answer this question please ? {question}")]
 
-        messages = agent_graph.invoke(
+        file_name = ""
+        messages = self.agent_graph.invoke(
             input={"messages": messages, "question": question, "input_file": file_name}, 
             config={
                 "recursion_limit": 10,