Update app.py

app.py

@@ -9,6 +9,12 @@ import pandas as pd
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
 
+class BasicAgent:
+    """A langgraph agent."""
+    def __init__(self):
+        print("BasicAgent initialized.")
+        self.graph = build_graph()
+
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """
     Fetches all questions, runs the BasicAgent on them, submits all answers,