I apologize for sparking such debate on this list instead of on
c.l.py. By the way, the only reason I brought this up was as a
replacement for lambdas in Py3K.
Guido, in response to your much earlier comment about supporting "{}"
for normal defs as a matter of consistency within my proposal, yes, I
agree. Just like ";", you should rarely use them.
Best Regards,
-jj
On 4/19/05, Phillip J. Eby <[EMAIL PROTECTED]> wrote:
> At 01:00 PM 04/19/2005 -0700, Guido van Rossum wrote:
> > > Interestingly, this syntax also works to do decoration, though it's not a
> > > syntax that was ever proposed for that. e.g.:
> > >
> > > foo = classmethod(foo) where:
> > > def foo(cls,x,y,z):
> > > # etc.
> >
> >This requires you to write foo three times, which defeats at least
> >half of the purpose of decorators.
>
> Well, you could do 'foo = classmethod(x) where: def x(...)', but that *is*
> kind of kludgy. I'm just suggesting that if 'where:' had existed before
> decorators, people might have griped about the three-time typing or kludged
> around it, but there wouldn't likely have been strong support for creating
> a syntax "just" for decorators.
>
> Indeed, if somebody had proposed this syntax during the decorator debates I
> would have supported it, but of course Bob Ippolito (whose PyObjC use cases
> involve really long function names) might have disagreed.
>
>
> > > foo = property(get_foo,set_foo) where:
> > > def get_foo(self):
> > > # ...
> > > def set_foo(self):
> > > # ...
> > >
> > > I don't mind @decorators, of course, but maybe they wouldn't be needed
> > here.
> >
> >As I said before, I'm not sure why keeping get_foo etc. out of the
> >class namespace is such a big deal.
>
> That's a relatively minor thing, compared to being able to logically group
> them with the property, which I think enhances readability, even more than
> the sometimes-proposed '@property.getter' and '@property.setter' decorators.
>
> Anyway, just to be clear, I don't personally think 'where:' is needed in
> Python 2.x; lambda and decorators suffice for all but the most Twisted use
> cases. ;) I was just viewing it as a potential alternative to lambda in
> Py3K.
>
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still get through.
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