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

[INADA Naoki]

I think adding this example to docstring and document may help many people.


On Wed, Jan 16, 2013 at 7:33 PM, Laurens Van Houtven <_ at lvh.cc> wrote:

> Hey Tarek,
>
> I would write that as any(x is None for x in it) -- the example you gave
> doesn't really strike me as an improvement over that, although I could see
> how many there are cases where it's nicer...
>
>
> On Wed, Jan 16, 2013 at 11:30 AM, Tarek Ziadé <tarek at ziade.org> wrote:
>
>>  Hello
>>
>> any() and all() are very useful small functions, and I am wondering if it
>> could be interesting to have them work
>> with different operators, by using a callable.
>>
>> e.g. something like:
>>
>> import operator
>>
>> def any(iterable, filter=operator.truth):
>>     for element in iterable:
>>         if filter(element):
>>             return True
>>     return False
>>
>>
>> For instance I could then us any() to find out if there's a None in the
>> sequence:
>>
>> if any(iterable, op=lambda x: x is None):
>>     raise SomeError("There's a none in that list")
>>
>>
>> Granted, it's easy to do it myself in a small util function - but since
>> any() and all() are in Python...
>>
>>
>> Cheers
>> Tarek
>>
>> --
>> Tarek Ziadé · http://ziade.org · @tarek_ziade
>>
>>
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>>
>
>
> --
> cheers
> lvh
>
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>


-- 
INADA Naoki  <songofacandy at gmail.com>
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