[Python-Dev] PEP 468

Émanuel Barry vgr255 at live.ca
Thu Jun 9 16:10:00 EDT 2016

> From: zreed at fastmail.com
> Subject: [Python-Dev] PEP 468
> Is there any further thoughts on including this in 3.6?  Similar to the
> recent discussion on OrderedDict namespaces for metaclasses, this would
> simplify / enable a number of type factory use cases where proper
> metaclasses are overkill. This feature would also be quite nice in say
> pandas where the (currently unspecified) field order used in the
> definition of frames is preserved in user-visible displays.

As stated by Guido (and pointed out in the PEP):

Making **kwds ordered is still open, but requires careful design and
implementation to avoid slowing down function calls that don't benefit.

The PEP has not been updated in a while, though. Python 3.5 has been
released, and with it a C implementation of OrderedDict.

Eric, are you still interested in this? IIRC that PEP was one of the
motivating use cases for implementing OrderedDict in C. Maybe it's time for
a second round of discussion on Python-ideas?


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