On Wed, Feb 4, 2009 at 10:43, Steven Bethard <steven.beth...@gmail.com> wrote: > On Wed, Feb 4, 2009 at 10:25 AM, Brett Cannon <br...@python.org> wrote: >> On Wed, Feb 4, 2009 at 05:35, Hrvoje Niksic <hrvoje.nik...@avl.com> wrote: >>> Andrew Bennetts wrote: >>>> >>>> A patch to add operator.caller(*args, **kwargs) may be a good idea. Your >>>> example would then be: >>>> >>>> map(operator.caller(), lst) >>> >>> Regarding the name, note that I proposed operator.call (and >>> operator.__call__) because it corresponds to the __call__ special method, >>> which is analogous to how operator.neg corresponds to __neg__, operator.add >>> to __add__, etc. The term "caller" implies creation of a new object that >>> carries additional state, such as method name in operator.methodcaller, item >>> in operator.itemgetter, or attr in operator.attrgetter. >> >> Part of the problem is the term 'call' is an overloaded term. Do you >> really mean only objects that define __call__? What about objects that >> define __init__ and thus can be called as well? If you mean the former >> than you have to make sure the docs are very clear about this; there >> is a reason we got rid of callable(). If you mean the latter then >> there is little benefit to the function since ``[x() for x in lst]`` >> gets you the same result as your map call. > > Not sure I follow you here. It's not the __init__ that allows you to > do ``x()``, it's the fact that the class declares a __call__, right? > >>>> class C(object): > ... pass > ... >>>> C.__call__() > <__main__.C object at 0x01A3C370> >>>> C() > <__main__.C object at 0x02622EB0> >>>> str.__call__() > '' >>>> str() > '' >
I don't think so:: >>> Foo.__call__ <method-wrapper '__call__' of type object at 0x81cee0c> >>> Foo.__call__ = lambda: None >>> Foo.__call__ <unbound method Foo.<lambda>> >>> Foo() <__main__.Foo object at 0xf7f90e8c> -Brett _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
