Please go find some real world code that would benefit from this. Don't make up examples, just show some code in a repository (public if possible, but private is okay, as long as you can quote small amounts of code from it) where te existence of reverse iteration over a dict would have been helpful.
On Thu, May 24, 2018 at 5:55 AM, Rémi Lapeyre <remi.lape...@vint.fr> wrote: > > Hi, > > since dict keys are sorted by their insertion order since Python 3.6 and > that > it’s part of Python specs since 3.7 a proposal has been made in bpo-33462 > to > add the __reversed__ method to dict and dict views. > > Concerns have been raised in the comments that this feature may add too > much > bloat in the core interpreter and be harmful for other Python > implementations. > > Given the different issues this change creates, I see three possibilities: > > 1. Accept the proposal has it is for dict and dict views, this would add > about > 300 lines and three new types in dictobject.c > > 2. Accept the proposal only for dict, this would add about 80 lines and one > new type in dictobject.c while still being useful for some use cases > > 3. Drop the proposal as the whole, while having some use, > reversed(dict(a=1, b=2)) > may not be very common and could be done using OrderedDict instead. > > What’s your stance on the issue ? > > Best regards, > Rémi Lapeyre > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: https://mail.python.org/mailman/options/python-dev/ > guido%40python.org > -- --Guido van Rossum (python.org/~guido)
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