New submission from Alexey Poryadin:
When is called `select`, but registered no one `fileobject` rise exception:
...
polled = self._selector.select(timeout)
File "/usr/lib/python3.4/selectors.py", line 424, in select
fd_event_list = self._epoll.poll(timeout, max_ev)
ValueError: maxevents must be greater than 0, got 0
Of course, it makes no sense to call `select` if there is nothing to watch. But
"select.epol.poll" is not raises exception in the same case if `max_ev`=-1. And
this simplifies the application code and is useful if need just sleep for a
timeout.
So, I suggest a small fix:
- fd_event_list = self._epoll.poll(timeout, max_ev)
+ fd_event_list = self._epoll.poll(timeout, max_ev or -1)
----------
messages: 232300
nosy: Alexey.Poryadin
priority: normal
severity: normal
status: open
title: selectors.EpollSelector.select raises exception when nothing to select.
type: behavior
versions: Python 3.4
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue23009>
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