On 2013-04-04, at 17:01 , Chris Angelico wrote: > On Fri, Apr 5, 2013 at 1:59 AM, Guido van Rossum <gu...@python.org> wrote: >> On Thu, Apr 4, 2013 at 7:47 AM, Chris Angelico <ros...@gmail.com> wrote: >>> Is there any argument that I can pass to Foo() to get back a Bar()? >>> Would anyone expect there to be one? Sure, I could override __new__ to >>> do stupid things, but in terms of logical expectations, I'd expect >>> that Foo(x) will return a Foo object, not a Bar object. Why should int >>> be any different? What have I missed here? >> >> >> A class can define a __new__ method that returns a different object. E.g. >> (python 3): >> > > Right, I'm aware it's possible. But who would expect it of a class?
Given it's one of the use cases for __new__ and immutable types have to be initialized through __new__ anyway, why would it be unexpected? _______________________________________________ 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
