Update app.py

app.py

@@ -116,8 +116,8 @@ def get_messages(client, thread):
     return messages
 
 #XXXXX
-def extract_file_id(data):
-    for step in data["data"]:
+def extract_file_id(step_details):
+    for step in step_details:
         if hasattr(step["step_details"], "tool_calls"):
             for tool_call in step['step_details'].tool_calls:
                 if hasattr(tool_call, "code_interpreter") and hasattr(tool_call.code_interpreter, "outputs"):