Proposal: default to concurrent

[Roland Smith]

On Sun, Jan 29, 2017 at 02:08:00PM -0500, John W. O'Brien wrote:
> Hello FreeBSD Python,
> 
> One of the most common problems I encounter with python3
> interoperability is when the concurrent option is needed and can be
> trivially enabled. There is a growing list of bugs where this, on a
> individual port basis, has been fixed ([0], [1]), is in progress ([2],
> [3]), or is in my queue and perhaps others' to submit ([4]). On the
> other hand, there are lots of ports for which concurrent is a no-op, and
> lots more that don't support python3 at all meaning that concurrent has
> little to no chance to cause harm.
> 
> What I propose is to enable the concurrent behavior by default and to
> provide a feature to disable it when necessary.

This would be very welcome. Personally I only use python 3. Python 2 is just
installed for the ports that require it.

There also seems to be a trend of separate py3-* ports. This is sometimes a
much better solution than trying to make a single port support python 2 and 3.
(I've been looking for a way to do this with matplotlib, but haven't
succeeded.)
But looking forward, it might be a better idea to make py2-* ports for legacy
stuff that doesn't support python 3. But that will probalby have to wait until
the ports tree is ready to move to default to python 3.

> I welcome supportive and dissenting comments as well as cautionary
> remarks about the likely pitfalls of pursuing this.
> 
> <snark>
> While it would be tempting to call the new feature something
> unflattering like "i_hate_python3" or "archaic_upstream" or
> "regressive", the most natural name is probably just "noconcurrent".
> </snark>

:-)

Roland
-- 
R.F.Smith                                   http://rsmith.home.xs4all.nl/
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