Bug 2363033

Summary:	Python's asyncio create_task is not working with Toga's example application
Product:	[Fedora] Fedora	Reporter:	Mauro Carvalho Chehab <mchehab>
Component:	python3.13	Assignee:	Python Maintainers <python-maint>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	42	CC:	ksurma, mhroncok, python-maint, python-packagers-sig, vstinner
Target Milestone:	---	Keywords:	Regression
Target Release:	---
Hardware:	Unspecified
OS:	Linux
URL:	https://github.com/beeware/toga/issues/3394
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-05-07 12:43:23 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Mauro Carvalho Chehab 2025-04-30 06:03:41 UTC

With Fedora 41 (Python 3.13.2), using create_task() inside Toga's startup function works fine. After upgrading to Fedora 42 (Python 3.13.3), asyncio now refuses accept create_task(), crashing with:

Traceback (most recent call last):
  File "/home/mchehab/.local/lib/python3.13/site-packages/toga_gtk/app.py", line 53, in gtk_startup
    self.interface._startup()
    ~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/mchehab/.local/lib/python3.13/site-packages/toga/app.py", line 630, in _startup
    self.startup()
    ~~~~~~~~~~~~^^
  File "/home/mchehab/bin/a.py", line 77, in startup
    asyncio.create_task(self.do_background_task())
    ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/asyncio/tasks.py", line 410, in create_task
    task = loop.create_task(coro, name=name)
  File "/usr/lib64/python3.13/asyncio/base_events.py", line 468, in create_task
    return self._task_factory(self, coro, **kwargs)
           ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
TypeError: App._install_task_factory_wrapper.<locals>.factory() got an unexpected keyword argument 'name'

Reproducible: Always

Steps to Reproduce:
1.Install Toga with pip
2.try to run https://github.com/beeware/toga/blob/main/examples/handlers/handlers/app.py
Actual Results:
Python's asyncio crashes with:

TypeError: App._install_task_factory_wrapper.<locals>.factory() got an unexpected keyword argument 'name'

Expected Results:
A GUI window should open

Comment 1 Victor Stinner 2025-05-07 12:27:33 UTC

It seems like the issue was already fixed upstream last week:

* https://github.com/beeware/toga/commit/bdd2e7ba01f801a59a05f02c864ccb0d4e6202b7
* https://github.com/beeware/toga/pull/3395

Comment 2 Miro Hrončok 2025-05-07 12:43:23 UTC

> Python 3.13.3 ensured that the name argument was passed down to task factories; this exposed a bug in Toga's task factory wrapper,

This is not a bug in Python, but in Toga, which you don't install from Fedora.

You need to ask https://github.com/beeware/toga for a new release or install from their github.