[Python-Dev] Keyword-only parameters

Alexander Walters tritium-list at sdamon.com
Tue Apr 14 19:45:37 CEST 2015


Lacking anything anyone else says... the use case for keyword only 
arguments (where they actually make the code better rather than simply 
being different) is rather limited.


On 4/14/2015 13:40, Eric V. Smith wrote:
> I'm working on adding a numeric_owner parameter to some tarfile methods
> (http://bugs.python.org/issue23193),
>
> In a review, Berker suggested making the parameter keyword-only. I agree
> that you'd likely never want to pass just "True", but that
> "numeric_owner=True" would be a better usage.
>
> But, I don't see a lot of keyword-only parameters being added to stdlib
> code. Is there some position we've taken on this? Barring someone saying
> "stdlib APIs shouldn't contain keyword-only params", I'm inclined to
> make numeric_owner keyword-only.
>
> Is there anything stopping me from making it keyword-only?
>
> Thanks.
> Eric.
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