On Thu, May 27, 2010 at 5:47 PM, Tim Chase <python.l...@tim.thechases.com>wrote:
> On 05/27/2010 03:32 PM, Victor Subervi wrote:
>
> On Thu, May 27, 2010 at 1:15 PM, Tim Chase wrote:
>>
>>> That should be:
>>>>
>>>> ', '.join(['%s'] * len(values)))
>>>>
>>>
>>> Or as I've done in the past:
>>>
>>> ', '.join('%s' for _ in values)
>>>
>>
>> Huh? Can you describe that underscore to me? Fascinating!
>>
>
> The underscore is a valid variable-name, idiomatically used for "I don't
> care about this", often seen in places like tuple assignment:
>
> a,_,_,d = some_4_element_tuple
>
> So in my above case, it could also have been written as
>
> ', '.join('%s' for value in values)
> ', '.join('%s' for dont_care_about_the_value in values)
>
> but the "_" idiom means "I'm iterating over 'values' but I'm not actually
> using the values I get from it"
>
I should have known. Thanks!
beno
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