[Python-3000] Generic functions vs. OO
janssen at parc.com
Wed Nov 29 18:07:08 CET 2006
I've updated the page to answer a few questions Jim Jewett posed, and
to expand a few more interfaces. I haven't tried to explain the
implementation types, like Code or Frame. I'm hoping someone else
will do that. I've broken up the File type into a set of types which
attempt to capture (1) the difference between an open file-system
file, and a file-like object, and (2) the difference between files
opened in binary mode and files opened in text mode.
Going through the type system again is interesting, and raises a few
questions about some of the interfaces. For instance, should files
opened in binary mode support iteration? If so, what's the unit of
See http://wiki.python.org/moin/AbstractBaseClasses for more.
> Guido van Rossum wrote:
> > I wonder if a bunch of well thought-out standard ABCs, applied to the
> > standard data types, and perhaps more support for setting __bases__,
> > wouldn't address most concerns.
> I think it would, but I don't know if we're going to get anywhere
> without getting more concrete. Let's tap "the wisdom of crowds". I've
> set up a Wiki page at http://wiki.python.org/moin/AbstractBaseClasses,
> and spent a little time defining some ABCs and concrete classes. I'll
> work on it more over the week, but feel free to pitch in and expand it.
> Or create alternative versions (create a new Wiki page, and put a link
> to it at the top of the existing page).
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