fix

app.py

@@ -3,16 +3,23 @@ import gradio as gr
 import requests
 import inspect
 import pandas as pd
+from smolagents import CodeAgent, InferenceClientModel
+from smolagents.tools.serper import SerperSearchTool  # make sure this path is correct
+
 
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
+serper_api_key = os.getenv("SERPER_API_KEY")
 
 # --- Basic Agent Definition ---
 class BasicAgent:
     def __init__(self):
-        from smolagents import CodeAgent, DuckDuckGoSearchTool, InferenceClientModel
 
-        search_tool = DuckDuckGoSearchTool()
+        serper_api_key = os.getenv("SERPER_API_KEY")
+        if not serper_api_key:
+            raise ValueError("Missing SERPER_API_KEY in environment variables.")
+
+        search_tool = SerperSearchTool(api_key=serper_api_key)
         model = InferenceClientModel()
 
         self.agent = CodeAgent(
@@ -31,6 +38,7 @@ class BasicAgent:
             return f"AGENT ERROR: {e}"
 
 
+
 def run_and_submit_all(profile: gr.OAuthProfile | None):
     """
     Fetches all questions, runs the BasicAgent on them, submits all answers,