在python 3.8中使用aiohttp和asyncio关闭异常事件循环

Question

我正在使用asyncio和aiohttp发出并发请求。我最近将Python升级到3.8.0版RuntimeError: Event loop is closed，程序运行后得到提示。

import asyncio
import aiohttp

async def do_call(name, session):
    async with session.get('https://www.google.be') as response:
        await response.text()
        return 'ok - {}'.format(name)

async def main():
    async with aiohttp.ClientSession() as session:
        tasks = [do_call(str(i), session) for i in range(0,4)]
        results = await asyncio.gather(*tasks)
        print(results)

asyncio.run(main())

我确实从asyncio.gather（）获得了有效的结果，但是退出时会引发异常。我想更改代码，以免发生异常。

追溯如下：

Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x000001E9A92079D0>
Traceback (most recent call last):
  File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38\lib\asyncio\proactor_events.py", line 116, in __del__
    self.close()
  File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38\lib\asyncio\proactor_events.py", line 108, in close
    self._loop.call_soon(self._call_connection_lost, None)
  File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38\lib\asyncio\base_events.py", line 711, in call_soon
    self._check_closed()
  File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38\lib\asyncio\base_events.py", line 504, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed`

Answer 1

我认为这很可能是aiohttp错误。具体来说，我在他们的github上发现了这个问题：https : //github.com/aio-
libs/aiohttp/issues/4324

我意识到这不一定对您有帮助，但是也许您可以转回去并停止将头撞在墙上。您的代码很好！