[Python-Dev] Why is nb_inplace_power ternary?

["Martin v. Löwis"]

Thomas Wouters schrieb:
> 
> Sure, and I don't know if anyone will ever want ipow() -- but I've never 
> seen real code use the three-argument pow() either. The fact is that all 
> the in-place modifying hooks return the result (which may or may not be 
> self, and may or may not be mutated) so an in-place three-argument pow() 
> would have to do the same. I would prefer keeping the similarity between 
> __ipow__ and __pow__, although I don't care if that means keeping the 
> always-unused third argument to __ipow__ (which isn't really in the way, 
> after all) or adding a new hook for the three-argument pow().

It's in the way in the sense that slot_nb_inplace_power discards its 
third argument silently. That shouldn't happen, so I still prefer
removing it throughout. Would you volunteer adding to fix that?

Regards,
Martin