[Python-ideas] Bring back callable()

[Michael Foord]

On 7 March 2011 20:09, Joao S. O. Bueno <jsbueno at python.org.br> wrote:

> On Mon, Mar 7, 2011 at 2:17 PM, Bill Janssen <janssen at parc.com> wrote:
> > Terry Reedy <tjreedy at udel.edu> wrote:
> >
> >> On 11/23/2010 6:01 PM, Antoine Pitrou wrote:
> >>
> >> > The substitute of writing `isinstance(x, collections.Callable)` is
> >> > not good, 1) because it's wordier 2) because collections is really not
> >> > an intuitive place where to look for a Callable ABC.
> >>
> >> I thnk it should be in the abc module, along with WeakSet
> >
> > Me too.
>

Too late. :-)


>
> I was not around here, and although I looked for, I didn't find this on the
> web:
>
> What was the reasoning for removing "callable" in the first place?
>
>
It didn't always do exactly the right thing (but was usually "good enough")
and was thought easy to replace with a more accurate alternative
(isinstance(foo, abc.Callable) I *think*) which proved annoying in pactise.

All the best,

Michael

 js
>  -><-
>
> >
> > Bill
> > _______________________________________________
> > Python-ideas mailing list
> > Python-ideas at python.org
> > http://mail.python.org/mailman/listinfo/python-ideas
> >
> _______________________________________________
> Python-ideas mailing list
> Python-ideas at python.org
> http://mail.python.org/mailman/listinfo/python-ideas
>



-- 

http://www.voidspace.org.uk/

May you do good and not evil
May you find forgiveness for yourself and forgive others
May you share freely, never taking more than you give.
-- the sqlite blessing http://www.sqlite.org/different.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-ideas/attachments/20110307/f0a34288/attachment.html>