[merge] 'raise NotImplemented'

[Lukáš Lalinský]

John Arbash Meinel wrote:
> In inventory.py there are a lot of places that are doing:
> 
> if not foo:
>   return NotImplemented
> 
> I'm pretty sure all of these should be:
> 
> if not foo:
>   raise NotImplemented
> 

No, __eq__ & co. should return NotImplemented [1]. It you use 'raise' then
usually with NotImplementedError.

-Lukáš

[1] http://docs.python.org/ref/customization.html#l2h-189