[Python-Dev] Guarantee ordered dict literals in v3.7?
Antoine Pitrou
solipsis at pitrou.net
Sun Nov 5 15:18:24 EST 2017
On Sun, 5 Nov 2017 21:06:12 +0100
Stefan Krah <stefan at bytereef.org> wrote:
> On Sun, Nov 05, 2017 at 09:35:38PM +0200, Serhiy Storchaka wrote:
> > 05.11.17 21:20, Stefan Krah пише:
> > >On Sun, Nov 05, 2017 at 09:01:40PM +0200, Serhiy Storchaka wrote:
> > >>Do you suggest to make dictionary displays producing OrderedDict
> > >>instead of dict?
> > >
> > >No, this is essentially a language spec doc issue that would guarantee
> > >the ordering properties of the current dict implementation.
> >
> > Wouldn't be enough to guarantee just the ordering of dicts before
> > first deletion? Or before first resizing (the maximal size of
> > dictionary displays is known at compile time, so they can be
> > presized)?
>
> Yes, for my use case that would be sufficient and that's what
> I had in mind initially.
>
>
> A luxury syntax addition like {a = 10, b = {c = "foo"}} that is read
> as an OrderedDict (where the keys a, b, c are implicitly strings) would
> of course also be sufficient for my use case.
Or you are ok with:
OD = OrderedDict
# ...
OD(a=10, b=OD(c="foo"))
Regards
Antoine.
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