Update agent.py

agent.py

@@ -1,9 +1,9 @@
-# agent.py — GAIA-ready async agent with FunctionCallingAgent + run fix
+# agent.py — alternatywa z FunctionAgent (stabilna dla GAIA)
 
 import os
 import asyncio
 from llama_index.llms.openai import OpenAI
-from llama_index.core.agent import FunctionCallingAgent
+from llama_index.core.agent.workflow import FunctionAgent
 from llama_index.core.tools import FunctionTool
 
 from langchain_community.utilities.wikipedia import WikipediaAPIWrapper
@@ -84,10 +84,10 @@ TOOLS = [
     FunctionTool.from_defaults(extract_excel_total_food_sales, name="extract_excel_total_food_sales", description="Sum total sales from Excel where category is 'food'.")
 ]
 
-# Create agent with improved system prompt
+# Create agent with FunctionAgent (compatible with run)
 llm = OpenAI(model="gpt-4")
 
-agent = FunctionCallingAgent.from_tools(
+agent = FunctionAgent(
     tools=TOOLS,
     llm=llm,
     verbose=True,
@@ -109,10 +109,12 @@ Rules:
 5. Avoid all explanation unless requested.
 """
 )
+
+# Stable async answer handler
 async def answer_question(question: str) -> str:
     try:
         result = await agent.run(question)
-        return result.strip()
+        return str(result).strip()
     except Exception as e:
         print("❌ Agent error:", e)
         return "[ERROR] " + str(e)