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Re: duck typing assert

References <mailman.3455.1352396166.27098.python-list@python.org> <509c412d$0$29980$c3e8da3$5496439d@news.astraweb.com> <CALwzidnNvsPByrFgpDCZM0_vrtJ+g8_3HDMUw-wK+gXc2iEfxQ@mail.gmail.com>
Date 2012-11-09 17:14 +1100
Subject Re: duck typing assert
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.3476.1352441691.27098.python-list@python.org> (permalink)

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On Fri, Nov 9, 2012 at 12:00 PM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> looks(Foo).like(IFoo), on the other hand, is crystal clear about which
> argument is which.

I'm not so sure that it is, tbh. If you read it like an English
sentence, it's clearly testing whether Foo matches the template in
IFoo, but which are you more likely to do: test one class to see if it
satisfies lots of templates, or test one template against every class
you meet? I think probably the latter is, if not more likely than the
former, at least sufficiently plausible as to create confusion. It
makes very good sense to say:

duckmatch(IFoo).compare(Foo)

ie with the arguments the other way.

ChrisA

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duck typing assert‏ Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-08 20:34 +0300
  Re: duck typing assert‏ Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-11-08 23:33 +0000
    Re: duck typing assert Ian Kelly <ian.g.kelly@gmail.com> - 2012-11-08 18:00 -0700
      Re: duck typing assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-11-09 13:36 +0000
        RE: duck typing assert Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-09 17:01 +0300
        Re: duck typing assert Chris Angelico <rosuav@gmail.com> - 2012-11-10 01:15 +1100
        RE: duck typing assert Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-09 17:37 +0300
    Re: duck typing assert Chris Angelico <rosuav@gmail.com> - 2012-11-09 17:14 +1100
    RE: duck typing assert Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-09 13:26 +0300
    RE: duck typing assert "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2012-11-09 17:37 +0000
    RE: duck typing assert Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-09 20:55 +0300

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