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I think that kills the "let's make all dicts ordered" idea, even for CPython. I wouldn't want people to start relying on this. The dict type should be clearly recognizable as the hash table it is.
Making \*\*kwds ordered is still open, but requires careful design and implementation to avoid slowing down function calls that don't benefit.
--Guido van Rossum (sent from Android phone)
On Mon, May 20, 2013 at 6:39 AM, Barry Warsaw <barry@python.org> wrote:
> Or in other words, if dicts are to be ordered, let's make it an explicit
> language feature that we can measure compliance against.
Guaranteeing a dict order would be tough on Jython - today it's nice
that we can just have a thin wrapper around ConcurrentHashMap. In a
world with hard ordering guarantees I think we'd need to write our own
from scratch.
-Frank
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