Update app.py

app.py

@@ -1,10 +1,19 @@
+import os
+import re
+import gradio as gr
+import requests
+import pandas as pd
+from duckduckgo_search import DDGS
+
 from langchain_huggingface import HuggingFaceEndpoint
 from langchain.agents import initialize_agent, Tool
 from langchain.agents.agent_types import AgentType
 from langchain.tools import tool
-from duckduckgo_search import DDGS
-import re
 
+# --- Constants ---
+DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
+
+# --- Tool Definitions ---
 @tool
 def search_web(query: str) -> str:
     """Search the web and return a relevant text snippet."""
@@ -28,13 +37,14 @@ def run_code_snippet(code: str) -> str:
     except Exception as e:
         return f"Error in code: {str(e)}"
 
+# --- GAIA Agent ---
 class GAIAAgent:
     def __init__(self):
         print("Initializing LangChain agent with Hugging FaceEndpoint...")
         self.llm = HuggingFaceEndpoint(
             repo_id="google/flan-t5-xl",
             temperature=0.3,
-            model_kwargs={"max_length": 256}  # ✅ fix: max_length passed safely
+            model_kwargs={"max_length": 256}
         )
         self.tools = [search_web, run_code_snippet]
         self.agent = initialize_agent(