[Python-ideas] Parametrized any() and all() ?

[Steven D'Aprano]

On 16/01/13 22:10, Nick Coghlan wrote:
> On Wed, Jan 16, 2013 at 8:44 PM, Tarek Ziadé<tarek at ziade.org>  wrote:
>> On 1/16/13 11:33 AM, Laurens Van Houtven wrote:
>>>
>>> Hey Tarek,
>>>
>>> I would write that as any(x is None for x in it)
>>
>>
>> But here you're building yet another iterable to adapt it to any(), which
>> seems to me overkill if we can just parametrized the loop in any()
>
> Such a micro-optimization isn't worth the cost of adding a second way
> to do it that everyone will then need to learn.


For all
we know, adding a filter function will be a pessimization, not an optimization,
using more memory and/or being slower than using a generator expression. It
certainly isn't clear to me that creating a generator expression like
(x is None for x in it) is more expensive than creating a filter function like
(lambda x: x is None).

-1 on adding a filter function.



-- 
Steven