[Python-ideas] Fix that broken callable builtin

[Ionel Cristian Mărieș]

Same as what would happen when you use the call operator on an object that
has an AttributeError raising property:

>>> class D:
> ...  @property
> ...  def __add__(self):
> ...   raise AttributeError('Not so fast, pardner!')
> ...
> >>> D() + D()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<stdin>", line 4, in __add__
> AttributeError: Not so fast, pardner!



Thanks,
-- Ionel Cristian Mărieș, http://blog.ionelmc.ro

On Sat, Apr 18, 2015 at 12:44 AM, Ethan Furman <ethan at stoneleaf.us> wrote:

> On 04/18, Ionel Cristian Mărieș wrote:
>
> > __add__ as a property/descriptor seems to work fine, eg:
> >
> > >>> class C:
> > > ...  @property
> > > ...  def __add__(self):
> > > ...   return lambda other: [self, other]
> > > ...
> > > >>> C() + C()
> > > [<__main__.C object at 0x0000000003652AC8>, <__main__.C object at
> > > 0x0000000003652CC0>]
> > >
> >
> > Am I missing something?
>
> What happens when your __add__ raises an AttributeError?
>
> --
> ~Ethan~
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