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

[Greg Ewing]

On Sat, Feb 3, 2018 at 10:46 PM, Ned Deily > wrote:

 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?


Guido has repeatedly promised that there will never be another
upheaval as big as the 2-to-3 one, and that the change from
Python 3.9 to 4.0 won't be anything special. Hopefully we can
trust him on that.

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

[Steve Holden]

On Sat, Feb 3, 2018 at 10:46 PM, Ned Deily  wrote:

> On Feb 3, 2018, at 17:40, Alex Walters  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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Re: [Python-Dev] Is 4.0 a major breaking changes release?

[Terry Reedy]

On 2/3/2018 5:50 PM, Zachary Ware wrote:

On Sat, Feb 3, 2018 at 4:40 PM, Alex Walters  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?


Emphatically no.  Anyone suggesting big breaking changes in 4.0 is
exercising wishful thinking :)

There may be some cleanup in 4.0, but only removing things that have
been deprecated for a long time in 3.x but hadn't been removed to
maintain compatibility with 2.7.


So do your porting with deprecation warnings on.


--
Terry Jan Reedy

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

[Dan Stromberg]

On Sat, Feb 3, 2018 at 2:40 PM, Alex Walters  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?

https://www.curiousefficiency.org/posts/2014/08/python-4000.html

Python 0.x to 1.x was a small change.
Python 1.x to 2.x was a small change.

I doubt there'll be anything as important as str -> (bytes, unicode)
to merit a breaking change.
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Re: [Python-Dev] Is 4.0 a major breaking changes release?

[Paul Moore]

On 3 February 2018 at 22:40, Alex Walters  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?

No. Guido has gone on record as saying this won't happen.

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

[Zachary Ware]

On Sat, Feb 3, 2018 at 4:40 PM, Alex Walters  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?

Emphatically no.  Anyone suggesting big breaking changes in 4.0 is
exercising wishful thinking :)

There may be some cleanup in 4.0, but only removing things that have
been deprecated for a long time in 3.x but hadn't been removed to
maintain compatibility with 2.7.

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

[Ned Deily]

On Feb 3, 2018, at 17:40, Alex Walters  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!

--
  Ned Deily
  n...@python.org -- []

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

[Alex Walters]

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?

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