你必须明白，你的调用do asyncio.gather并不是“阻塞线程”，而是阻塞了 task。如果你想在checker-tasks运行的时候运行东西，并且web会话是打开的，只需触发gather来同步那些任务，而不是你想运行东西的任务。
如果任务永远不会返回，那么实际上你甚至不需要调用gather on-只需注意set或其他容器中的所有任务，并保留这些任务，这样它们就不会被取消引用，并且可以在时间到来时适当地取消。
除此之外，在没有使用gather等待任务时报告错误的唯一原因是，执行福尔斯脱离了打开会话的with语句块。
你可以不使用with代码块，手动调用__enter__和__exit__方法--但是你也可以简单地重写代码，这样with block就在searate任务中，正如我上面提到的。在Python 3.11中，你可以使用任务组：它们将比gather更好地工作，并且当父任务本身被取消时取消所有检查器任务。

import asyncio
import aiohttp

LIMIT = 2

async def check_uptime_coro(session: aiohttp.ClientSession, url: str, semaphore: asyncio.BoundedSemaphore) -> None:
    while True:
        try:
            async with semaphore:
                async with session.get(url) as response:
                    if response.status != 200:
                        print(f"error with {url} {response.status}")
                    else:
                        print(f"success with {url}")
            await asyncio.sleep(5)
        except Exception as e:
            print(f"error with {url} {e}")

async def check_uptime_master():
        urls = [f"http://localhost:8080/{x}" for x in range(0, 10)]
        tasks = {}
        semaphore = asyncio.BoundedSemaphore(LIMIT)
        async with aiohttp.ClientSession() as session:
            for url in urls:
                tasks[url] = asyncio.create_task(
                    check_uptime_coro(session, url, semaphore))

            await asyncio.gather(*tasks.values(), return_exceptions=True)

async def main() -> None:
    try:
        checker_task = asyncio.create_task(check_uptime_master())
        await asyncio.sleep(0)  # give the asyncio loop  a chance to fire-up the subtasks
        print("This now, does print!")
    except Exception as e:
        print(f"error! {e}")
    # go on with your code on the main task, DOn't forget to yield to the loop
    # so subtasks can run!
    ...

if __name__ == "__main__":
    asyncio.run(main()) # this is the new recomended way to fire asyncio
    # loop = asyncio.get_event_loop()  #<- obsolete
    # loop.run_until_complete(main())  # <- obsolete
    print("This also doesn't print - and will not until yo write code that explictly cancels the `checker_task` above")