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Tue Jan 12 19:29:06 CET 2010 · https://mail.python.org/pipermail/python-dev/2010-January/097265.html

On Tue, Jan 12, 2010 at 04:29, Michael Foord <fuzzyman at voidspace.org.uk>wrote:

>  On 12/01/2010 12:16, Barry Warsaw wrote:
>
> On Jan 11, 2010, at 09:57 PM, Steven Bethard wrote:
>
>
>
>  Actually there's a solution to this one too:
>
>    FooBase = Meta('FooBase', (), {})
>    class Foo(FooBase):
>        ...
>
> That should work in Python 2.X and 3.X.
>
>
>  Ugly, but good call! :)
>
>
>
>
> There are all sorts of tricks. For example you can do exception handling
> that works with pre-2.6 syntax and 3.0 with a bare except and using
> sys.exc_info. It is horrible, but acceptable for short pieces of code (I
> have a couple of small modules that do this).
>
> I haven't yet tried converting larger code-bases to Python 3, but I think
> the workflow advocated by Martin is greatly preferable to the hacks and
> tricks needed to make the same codebase run under 2 & 3.
>
>
In other words we need to pull together a HOWTO for Python source like the
one for extension modules that Benjamin wrote and make it rather prominently
linked from the Python 3 documentation index page.

-Brett
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