[Python-Dev] Guarantee ordered dict literals in v3.7?

[Stefan Krah]

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.


But I suspect many users who have other use cases find it tantalizing
not to be able to use the properties of the current regular dict.



Stefan Krah