[Python-3000] More PEP 3101 changes incoming

[Adam Olsen]

On 8/3/07, Adam Olsen <rhamph at gmail.com> wrote:
> class MyFloat:
>     def __format__(self, type, ...):
>         if type == 'D':
>             return custom format
>         else:
>             return float(self).__format__(type, ...)

Oops, explicitly falling back to float is unnecessary here.  It should
instead be:

class MyFloat:
    def __float__(self):
        return self as float
    def __format__(self, type, ...):
        if type == 'D':
            return custom format
        else:
            return NotImplemented  # Falls back to self.__float__().__format__()

-- 
Adam Olsen, aka Rhamphoryncus