Update app.py

app.py

@@ -4,6 +4,7 @@ import requests
 import inspect
 import pandas as pd
 from smolagents import CodeAgent, DuckDuckGoSearchTool, OpenAIServerModel, VisitWebpageTool, Tool, HfApiModel, ToolCallingAgent
+import io
 # (Keep Constants as is)
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
@@ -17,7 +18,7 @@ class AttachmentDownloadTool(Tool):
             "description": "task_id that needs to download attachment files."
         }
     }
-    output_type = File
+    output_type = io.BytesIO
 
     def forward(self, task_id):
         download_url = f"{api_url}/files/"