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Sun Mar 7 05:43:15 CET 2010 · https://mail.python.org/pipermail/python-dev/2010-March/098260.html

Greg Ewing wrote:
> The thing to consider, I think, is whether it makes sense in
> a large proportion of use cases to ignore the fact that the
> cancel failed and carry on regardless. If not, then raising an
> exception makes it much harder to accidentally ignore the
> situation.

Cancelling operations is generally a best effort activity - having to
wrap it an exception handler would be annoying.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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[Python-Dev] [PEP 3148] futures - execute computations asynchronously