Update app.py

app.py

@@ -3,21 +3,24 @@ import gradio as gr
 import requests
 import inspect
 import pandas as pd
+from langchain_core.messages import HumanMessage
+from llm_agent import build_graph
+
 
-# (Keep Constants as is)
-# --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
-# --- Basic Agent Definition ---
-# ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
 class BasicAgent:
+    """A LangGraph Agent"""
     def __init__(self):
-        print("BasicAgent initialized.")
-    def __call__(self, question: str) -> str:
-        print(f"Agent received question (first 50 chars): {question[:50]}...")
-        fixed_answer = "This is a default answer."
-        print(f"Agent returning fixed answer: {fixed_answer}")
-        return fixed_answer
+        print("BasicAgent is Intialized")
+        self.graph = build_graph()
+
+    def __call__(self,question:str)->str:
+        print(f"Agent receoved question")
+        messages = [HumanMessage(content=question)]
+        messages = self.graph.invoke({"messages":messages})
+        response = messages["messages"][-1].content
+        return response[14:]
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """