[Python-ideas] Idea: Deferred Default Arguments?

[Nick Coghlan]

On 20 July 2018 at 22:45, Steven D'Aprano <steve at pearwood.info> wrote:
> Perhaps you mean duplicate, or repeat, or copy. But surely they're not
> redefined -- then they would have different values. Being able to
> redefine the defaults in a wrapper function is a feature.
>
> Putting aside the terminology, I think this is a minor annoyance: DRY
> violations when setting default values.

FWIW, I tend to handle this problem the same way I handle other DRY
problems with magic constants: give the default value a name and
either export it directly, or export an API for retrieving it.

If that results in name sprawl ("But now I have 15 defaults to
export!"), then I take it as a hint that I may not be modeling my data
correctly, and am missing a class definition or two somewhere.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia