[Python-ideas] sys.py3k

[Nick Coghlan]

On Nov 6, 2012 2:12 AM, "Barry Warsaw" <barry at python.org> wrote:
>
> On Nov 05, 2012, at 06:04 PM, Nick Coghlan wrote:
>
> >Even better (http://packages.python.org/six/#package-contents):
> >
> >    import six
> >
> >    if six.PY3:
> >        # Ooh, Python 3
> >    else:
> >        # Not Python 3
> >
> >If anyone is trying to do single code base Python 2/3 support without
> >relying on six, they're doing it wrong. Even bundling a copy (if you
> >don't want to deal with dependency management issues) is a better idea
> >than reinventing that wheel.
> >
> >If you *are* rolling your own (or need additional compatibility fixes
> >that six doesn't provide), then all Python 2/3 compatibility hacks
> >should be located in a small number of compatibility modules. They
> >*shouldn't* be distributed widely throughout your codebase.
>
> While I agree with the sentiment, and also agree that six is an excellent
> package that can be very useful, I'll just point out that it's often very
> possible and not at all painful to write to a single code base without
using
> it.  It all depends on what your code does/needs.

True, my own 2/3 compatible projects don't use it, but they also don't have
any significant special cases for either version. I guess stick a "for
non-trivial cases" qualifier in there somewhere :)

Cheers,
Nick.

--
Sent from my phone, thus the relative brevity :)

> Cheers,
> -Barry
>
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