Update app.py

app.py

@@ -3,6 +3,8 @@ import gradio as gr
 import requests
 import inspect
 import pandas as pd
+from langchain_core.messages import HumanMessage
+from agent import build_graph
 
 # (Keep Constants as is)
 # --- Constants ---
@@ -13,9 +15,12 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 class BasicAgent:
     def __init__(self):
         print("BasicAgent initialized.")
+        self.graph = build_graph()
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
-        fixed_answer = "This is a default answer."
+        messages = [HumanMessage(content=question)]
+        messages = self.graph.invoke({"messages": messages})
+        fixed_answer = messages["messages"][0]["output"]        
         print(f"Agent returning fixed answer: {fixed_answer}")
         return fixed_answer