I'm -1 because the concept of "timeout" is generic enough to be often implemented as a custom exception, which poses questions re. backward/forward compatibilty. E.g. in psutil I have "TimeoutExpired", also providing a "seconds" attribute. Also I've probably never seen ETIME / ETIMEDOUT happening, whereas AFAIU the point PEP 3151 was to create mappings for the most common errnos.

On Sun, May 24, 2020 at 6:48 PM Eric V. Smith <eric@trueblade.com> wrote:

Does anyone have an opinion on https://bugs.python.org/issue39673? It maps ETIME to TimeoutError, in addition to the already existing ETIMEDOUT.

http://man7.org/linux/man-pages/man3/errno.3.html says:
       ETIME           Timer expired (POSIX.1 (XSI STREAMS option)).

                       (POSIX.1 says "STREAM ioctl(2) timeout".)

       ETIMEDOUT       Connection timed out (POSIX.1-2001).
 
It seems like a reasonable change to me, but I'm not a subject matter expert on STREAMS, or what other affect this might have.

And if added to 3.10, should it be backported? I'd tend to say "no", because of unknown impacts on existing code.

Eric
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