import sys import asyncio if sys.version_info >= (3, 13): from asyncio import EventLoop elif sys.platform == "win32": from asyncio import ProactorEventLoop as EventLoop else: from asyncio import SelectorEventLoop as EventLoop def loop_factory(): loop = EventLoop() loop.set_task_factory(asyncio.eager_task_factory) return loop async def main(): async with asyncio.TaskGroup() as tg: async def third_task(): raise RuntimeError("third task failed") async def second_task(): tg.create_task(third_task()) await asyncio.Event().wait() tg.create_task(second_task()) # asyncio.run(main()) asyncio.run(main(), loop_factory=loop_factory)