[Python-Dev] Python 2.x and 3.x use survey, 2014 edition

[Brett Cannon]

On Thu Dec 11 2014 at 3:14:42 PM Dan Stromberg <drsalists at gmail.com> wrote:

> On Thu, Dec 11, 2014 at 11:35 AM, Mark Roberts <wizzat at gmail.com> wrote:
> > I disagree. I know there's a huge focus on The Big Libraries (and
> wholesale
> > migration is all but impossible without them), but the long tail of
> > libraries is still incredibly important. It's like saying that migrating
> the
> > top 10 Perl libraries to Perl 6 would allow people to completely ignore
> all
> > of CPAN. It just doesn't make sense.
>
> Things in the Python 2.x vs 3.x world aren't that bad.
>
> See:
> https://python3wos.appspot.com/ and
> https://wiki.python.org/moin/PortingPythonToPy3k
> http://stromberg.dnsalias.org/~strombrg/Intro-to-Python/ (writing code
> to run on 2.x and 3.x)
>
> I believe just about everything I've written over the last few years
> either ran on 2.x and 3.x unmodified, or ran on 3.x alone.  If you go
> the former route, you don't need to wait for your libraries to be
> updated.
>
> I usually run pylint twice for my projects (after each change, prior
> to checkin), once with a 2.x interpreter, and once with a 3.x
> interpreter (using
> http://stromberg.dnsalias.org/svn/this-pylint/trunk/this-pylint) , but
> I gather pylint has the option of running on a 2.x interpreter and
> warning about anything that wouldn't work on 3.x.
>

Pylint 1.4 has a --py3k flag to run only checks related to Python 3
compatibility under Python 2.
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