New submission from Chih-Hsuan Yen <yan12...@gmail.com>:
With Python 3.9.7, "DeprecationWarning: The loop argument is deprecated" may be reported when user code does not use it. Here is an example: import asyncio import warnings warnings.filterwarnings('error') def crash(): raise KeyboardInterrupt async def main(): asyncio.get_event_loop().call_soon(crash) await asyncio.sleep(5) try: asyncio.run(main()) except KeyboardInterrupt: pass On 3.9.6, no warning is reported, while results on 3.9.7 are Traceback (most recent call last): File "/usr/lib/python3.9/asyncio/runners.py", line 44, in run return loop.run_until_complete(main) File "/usr/lib/python3.9/asyncio/base_events.py", line 629, in run_until_complete self.run_forever() File "/usr/lib/python3.9/asyncio/base_events.py", line 596, in run_forever self._run_once() File "/usr/lib/python3.9/asyncio/base_events.py", line 1890, in _run_once handle._run() File "/usr/lib/python3.9/asyncio/events.py", line 80, in _run self._context.run(self._callback, *self._args) File "/home/yen/var/local/Computer/archlinux/community/python-anyio/trunk/cpython-3.9.7-regression.py", line 11, in crash raise KeyboardInterrupt KeyboardInterrupt During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/yen/var/local/Computer/archlinux/community/python-anyio/trunk/cpython-3.9.7-regression.py", line 18, in <module> asyncio.run(main()) File "/usr/lib/python3.9/asyncio/runners.py", line 47, in run _cancel_all_tasks(loop) File "/usr/lib/python3.9/asyncio/runners.py", line 64, in _cancel_all_tasks tasks.gather(*to_cancel, loop=loop, return_exceptions=True)) File "/usr/lib/python3.9/asyncio/tasks.py", line 755, in gather warnings.warn("The loop argument is deprecated since Python 3.8, " DeprecationWarning: The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10. As indicated by the traceback, the loop argument is used inside the asyncio library, not from user code. It has been an issue for some time, and the issue is exposed after changes for issue44815. Credit: this example code is modified from an anyio test https://github.com/agronholm/anyio/blob/3.3.0/tests/test_taskgroups.py#L943. I noticed this issue when I was testing anyio against 3.9.7. ---------- components: asyncio messages: 401032 nosy: asvetlov, yan12125, yselivanov priority: normal severity: normal status: open title: "The loop argument is deprecated" reported when user code does not use it type: behavior versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45097> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com