Update app.py

app.py

@@ -119,7 +119,7 @@ def upload_attachment(cookie ,organization_id,file_path):
 
 
 
-def request_to_v2(message, cookie, user_id,context=[]):
+def request_to_v2(message, cookie, user_id,attachment=None,context=[]):
     ## 是否加入文件
     # Upload attachment if provided
     attachment = attachment.name