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From: Andriy Kornatskyy <andriy.kornatskyy@live.com>
To: <ramit.prasad@jpmorgan.com>, "python-list@python.org" <python-list@python.org>
Subject: RE: duck typing assert
Date: Fri, 9 Nov 2012 20:55:03 +0300
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Xref: csiph.com comp.lang.python:33045


duck(Foo).match(IFoo=2C <kwargs>)
duck(Foo).like(IFoo=2C <kwargs>)

Hm... function name in most cases is read as verb... this may cause confusi=
on:
duck =3D> synonyms =3D> immerse=2C dip

Thanks.

Andriy Kornatskyy

----------------------------------------
> From: ramit.prasad@jpmorgan.com
> To: andriy.kornatskyy@live.com=3B python-list@python.org
> Subject: RE: duck typing assert
> Date: Fri=2C 9 Nov 2012 17:37:29 +0000
>
> Andriy Kornatskyy wrote:
> >
> > Thank you for all comments.
> >
> > > It makes very good sense to say:
> > >
> > > duckmatch(IFoo).compare(Foo)
> >
> > Since we do duck match of IFoo... but there is no `duck match`=2C there=
 is `duck test`. I believe instead of
> > `compare` is more readable with `equals`. Than it is more from mathemat=
ics - precise answer... that you can not
> > guarantee at all in dynamic programming language. So it false to use su=
ch wording to reflect this check. We can
> > only make an assumption that one looks like the other (similar)... with=
 some limitation of cause...
> > understanding what is `duck test`.
> >
> > http://en.wikipedia.org/wiki/Duck_test
> >
> > The intent is to make such language `construct` so it reads as English =
sentence that make sense=2C and not
> > mandatory `pythonic` way (readability counts=2C java smokes aside).
> >
> > is_similar(Foo).to(IFoo) # <=3D but we lost `duck test` sense here?
> >
> > Words `looks` and `like` are coming from duck test and point also direc=
tion:
> >
> > # 1
> > looks(Foo).like(IFoo=2C notice=3D['__len__']=2C ignore_funcs=3D['foo']=
=2C ignore_argspec['bar'])
> >
> > English sentence equivalent: if functions in Foo looks like one in IFoo=
 than=2C probably=2C IFoo can be replaced
> > with Foo=3B notice to check __len__=2C it is safe to ignore function `f=
oo` and arguments passed to `bar`.
> >
> > # 2
> > looks(Foo=2C notice=3D['__len__']=2C ignore_funcs=3D['foo']=2C ignore_a=
rgspec['bar']).like(IFoo)
> >
> > English sentence equivalent: while looking at Foo notice to check `__le=
n__`=2C it is safe to ignore function `foo`
> > and arguments passed to `bar`=2C than probably it like IFoo.
>
> What about?
>
> duck(Foo).equivalent_to(IFoo=2C <kwargs>)
> duck(Foo).matches(IFoo=2C <kwargs>)
>
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