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[Python-Dev] Is 4.0 a major breaking changes release?

Steve Holden steve at holdenweb.com
Sat Feb 3 21:23:52 EST 2018 
On Sat, Feb 3, 2018 at 10:46 PM, Ned Deily <nad at python.org> wrote:

> On Feb 3, 2018, at 17:40, Alex Walters <tritium-list at sdamon.com> wrote:
> > I am still working on porting code from 2.x to 3.x.  As of late on the
> lists
> > I've seen comments about making somewhat major changes in 4.0 - now I'm
> > concerned that I should pause my porting effort until that is released.
> Is
> > python 4 going to be another python 3?
>
> At this point, Python 4 is just a convenient tag for really big changes.
> There are no concrete plans or schedule for such a major undertaking.  Port
> away to Python 3.x!
>
> ​"Py3K?" they said, "oh, no, we're just noodling around with a few ideas
..."​ :-)

To be honest, and historically fair to Guido, he did warn for a long time
that we should expect breaking changes in an eventual wart-removal release.

It seemed to me the biggest disappointment was the team not having the
resources to devote to a mooted but never really achieved reorganisation of
the stdlib.

​Rectifying that omission would, I hope, be included as a priority in any
Python 4 design. Since people rely on the stdlib hugely, automated
translation of at least 98% of existing stdlib imports should be a goal.
But that's just  me.
​
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