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List:       kwrite-devel
Subject:    Re: Switching to Python 3
From:       Dominik Haumann <dhaumann () kde ! org>
Date:       2013-11-10 12:25:12
Message-ID: 1440181.t1OtcQgf0g () eriador
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On Sunday 10 November 2013 13:14:36 Christoph Cullmann wrote:
> Hi,
> 
> as posted yesterday, there will be some switch in Kate to support KDE
> Frameworks 5 in the next months. Perhaps we just do this python switch just
> for the 5.x version and keep the 4.x as is, it that is no too big delay for
> you Python-Devs.

That is true, are we able to ship a Python plugin then in the 4.x line that 
just works?

I think this is what Philipp tries to solve - as soon as possible.


The answer is partly given by Alex' patch, that (currently) at compile time 
either supports Python 2 or Python 3. But if it's at compile time, we could 
just choose Python 3. And with this, we arrive again at Philipp's proposal.

Greetings,
Dominik

> Greetings
> Christoph
> 
> ----- Ursprüngliche Mail -----
> 
> > Hi!
> > 
> > After my proposal to switch to Python3 was met more positively than
> > expected, it seems to be a real possible goal. What it means for us
> > 
> > 
> > For us, it means that afterwards, we can drop compatibility crutches, can
> > use all Python stdlib features, and don't have to test 2 differently
> > compiled versions of Kate anymore.
> > 
> > It also means that Kate (when compiled with Pâté at all) depends on
> > libpython3.x + (where "x" has yet to be decided, but should be at least
> > "2"
> > imho, if not "3"), instead of on "that libpython which the packager feels
> > like linking against" What it means for distributions
> > 
> > 
> > There seem to be misconceptions about what "default python version in
> > Ubuntu/Fedora/…" means.
> > 
> > It's pretty easy: It's the version delivered on the ISO which system tools
> > depend on.
> > 
> >  � � � It's not the target of the symlink /usr/bin/python !!! Many
> > distributions will likely never link python → python3, and still call
> > Python 3 "default".
> > 
> > This means e.g. Ubuntu⁽ �⁾ and Fedora⁽ �⁾ currently don't have a default
> > version , as some system tools depend on 2 while others depend on 3. And
> > to
> > them, "switching" means to eliminate the need to ship Python 2 on the
> > installation media, by porting all system tools to 3. What it means,
> > combined
> > 
> > 
> > This means that currently , any program that wants to minimize
> > dependencies, and depends either on Python 2 or 3 can ship any way it
> > wants, and in the future , such programs should ship depending on Python
> > 3.
> > 
> > That means that we (Kate) can switch to Python 3 right now without causing
> > problems, if Ubuntu and Fedora are indicative of all distros.
> > 
> > 
> > ⁽ �⁾ https://wiki.ubuntu.com/Python/3
> > ⁽ �⁾ https://fedoraproject.org/wiki/Changes/Python_3_as_Default#Scope
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