OSError: [WinError 10038] An operation was attempted on something that is not a socket

[tgg-bartek]

Describe the bug
Your very own code snippet fails when run in a loop.

import asyncio

from proxybroker import Broker


async def save(proxies, filename):
    """Save proxies to a file."""
    with open(filename, 'w') as f:
        while True:
            proxy = await proxies.get()
            if proxy is None:
                break
            proto = 'https' if 'HTTPS' in proxy.types else 'http'
            row = '%s://%s:%d\n' % (proto, proxy.host, proxy.port)
            f.write(row)


def main():
    proxies = asyncio.Queue()
    broker = Broker(proxies)
    tasks = asyncio.gather(
        broker.find(types=['HTTP', 'HTTPS'], limit=10),
        save(proxies, filename='proxies.txt'),
    )
    loop = asyncio.get_event_loop()
    loop.run_until_complete(tasks)


if __name__ == '__main__':
    for _ in range(5):
        main()

Raises

Traceback (most recent call last):
File "C:\Python\Python38\lib\asyncio\base_events.py", line 603, in run_until_complete
self.run_forever()
File "C:\Python\Python38\lib\asyncio\base_events.py", line 570, in run_forever
self._run_once()
File "C:\Python\Python38\lib\asyncio\base_events.py", line 1823, in _run_once
event_list = self._selector.select(timeout)
File "C:\Python\Python38\lib\selectors.py", line 323, in select
r, w, _ = self._select(self._readers, self._writers, [], timeout)
File "C:\Python\Python38\lib\selectors.py", line 314, in _select
r, w, x = select.select(r, w, w, timeout)
OSError: [WinError 10038] An operation was attempted on something that is not a socket

Im on Windows 7.

Adding broker.stop() does not solve it.