python - 为什么像 asyncio.call_later 这样的延迟调用有不超过一天的限制？

Question

https://docs.python.org/3/library/asyncio-eventloop.html#delayed-calls

Note: Timeouts (relative delay or absolute when) should not exceed one day.

有没有人能很好地解释为什么存在这个限制？

提前致谢

Answer 1

这是由于 issue 20493 :

In asyncio, if the next event is in 2^40 seconds, epoll.poll() raises an OverflowError because epoll_wait() maximum value for the timeout is INT_MAX seconds.

Guido van Rossum 建议:

For now, can we just add to the asyncio docs that timeouts shouldn't exceed one day? Then we can fix it later without breaking expectations.

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