Update app.py

app.py

@@ -13,11 +13,93 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 class BasicAgent:
     def __init__(self):
         print("BasicAgent initialized.")
+
+        if os.getenv("OPENAI_API_KEY") and OpenAIServerModel is not None:
+            print("Using OpenAI model.")
+            self.model = OpenAIServerModel(
+                model_id=os.getenv("OPENAI_MODEL", "gpt-4o-mini"),
+                api_base="https://api.openai.com/v1",
+                api_key=os.environ["OPENAI_API_KEY"],
+                temperature=0,
+                max_tokens=4096,
+            )
+        else:
+            print("Using Hugging Face model.")
+            self.model = InferenceClientModel(
+                model_id=os.getenv("HF_MODEL_ID", "Qwen/Qwen2.5-72B-Instruct"),
+                token=os.getenv("HF_TOKEN"),
+                temperature=0,
+                max_tokens=4096,
+                timeout=120,
+            )
+
+        self.agent = CodeAgent(
+            tools=[
+                DuckDuckGoSearchTool(),
+                VisitWebpageTool(),
+            ],
+            model=self.model,
+            add_base_tools=True,
+            additional_authorized_imports=[
+                "collections",
+                "csv",
+                "datetime",
+                "itertools",
+                "json",
+                "math",
+                "os",
+                "pandas",
+                "pathlib",
+                "re",
+                "statistics",
+                "string",
+                "time",
+            ],
+            max_steps=10,
+            verbosity_level=1,
+        )
+
     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
+
+        prompt = f"""
+You are solving a GAIA-style benchmark question.
+
+Use web search when needed.
+Use Python when calculations, files, dates, tables, counting, or exact transformations are needed.
+
+Return only the final answer.
+No explanation.
+No markdown.
+No full sentence unless the question explicitly asks for one.
+Preserve exact requested formatting.
+
+Question:
+{question}
+"""
+
+        try:
+            answer = self.agent.run(prompt)
+            answer = str(answer).strip()
+
+            for prefix in [
+                "Final answer:",
+                "Final Answer:",
+                "FINAL ANSWER:",
+                "Answer:",
+                "The answer is",
+                "The final answer is",
+            ]:
+                if answer.startswith(prefix):
+                    answer = answer[len(prefix):].strip()
+
+            answer = answer.strip().strip('"').strip("'").strip()
+            print(f"Agent returning answer: {answer}")
+            return answer
+
+        except Exception as e:
+            print(f"Agent error: {e}")
+            return f"AGENT ERROR: {e}"
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """