On Thu, 22 Oct 2020 at 13:36, Chris Angelico <ros...@gmail.com> wrote:
>
> On Thu, Oct 22, 2020 at 8:22 PM Steven D'Aprano <st...@pearwood.info> wrote:
> >
> > On Wed, Oct 21, 2020 at 07:17:21PM -0700, Guido van Rossum wrote:
> >
> > > Hmm, if the above is acceptable, maybe f-strings are still the logical
> > > next
> > > step, since they bring the format and the target name together again.
> >
> > That's not the only way to bring the format and target name together.
> > Both brace-style and percent-style can do that:
> >
> > '{number:d}'
> > '%(number)d'
>
> Maybe, but if it isn't an actual syntactic construct, there's no value
> - at best, all you can do is return a dictionary, and there's no
> convenient way to assign those to locals.
I think that there's *plenty* of value. Returning a dictionary (or
maybe a dataclass) is far from merely being "at best", it's a common,
well-known, and easy to use pattern. Libraries like argparse use it
very successfully.
Direct assignment to locals would require syntax, but I think a lot of
people in this thread consider that to be at best a minor additional
convenience - and many people have argued that the pitfalls are a lot
worse than the benefits, and consider direct assignment to locals to
be a disadvantage, rather than a benefit.
Paul
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