[Python-Dev] Small any/all enhancement

[Alex Martelli]

On Dec 27, 2005, at 12:45 PM, Valentino Volonghi aka Dialtone wrote:
    ...
> any(iterable, test=bool) and all(iterable, test=bool)
    ...
> any(some_objects, test=operator.attrgetter('some_attribute'))

Why would that be better than
any(o.some_attribute for o in some_objects)
?

> def zerop(x):
>     return x==0
>
> all(some_objects, zerop)

and why would that be better than
all(o==0 for o in some_objects)
?

> instead of preprocessing the generator with a generator expression  
> before
> passing it to any/all.

I guess I just don't see the advantage, along any plane, since the  
genexp fits so snugly right there inside the any/all's parentheses.   
What am I missing?


Alex