Le 29/07/2017 à 18:14, Alex Walters a écrit : > My $0.02 on the entire series of nametuple threads is… there **might** > be value in an immutable namespace type, and a mutable namespace type, > but namedtuple’s promise is that they can be used anywhere a tuple can > be used. If passing in kwargs to create the potential replacement to > namedtuple is sensitive to dict iteration order, it really isn’t a > viable replacement for namedtuple.
In Python 3.6, kwargs order is preserved and guaranteed. It's currently implemented by relying on the non guaranteed dict order. But the 2 are not linked. The spec does guaranty that for now on, kwargs order is always preserved whether the dict order is or not. > > > > I do feel like there isn’t that big of a usecase for an immutable > namespace type as there is for a namedtuple. I would rather namedtuple > class creation be quicker. > > > > > > *From:* Python-ideas > [mailto:python-ideas-bounces+tritium-list=sdamon....@python.org] *On > Behalf Of *Chris Barker > *Sent:* Friday, July 28, 2017 8:27 PM > *To:* Ethan Furman <et...@stoneleaf.us> > *Cc:* Python-Ideas <python-ideas@python.org> > *Subject:* Re: [Python-ideas] namedtuple literals [Was: RE a new namedtuple] > > > > On Thu, Jul 27, 2017 at 7:42 PM, Ethan Furman <et...@stoneleaf.us > <mailto:et...@stoneleaf.us>> wrote: > > How I get the point[0] == 3? The first definition of an ntuple had > the order as x, y, and since the proposal is only comparing field > names (not order), this (y, x) ntuple ends up being reversed to how > it was specified. > > > > I'm not sure there ever was a "proposal" per se, but: > > ntuple(x=a, y=b) > > > > had better be a different type than: > > ntuple(y=b, x=a) > > but first we need to decide if we want an easy way to make an > namedtuple-like object or a SimpleNemaspace-like object.... > > > > but if you are going to allow indexing by integer, then order needs to > be part of the definition. > > > > -CHB > > > -- > > > Christopher Barker, Ph.D. > Oceanographer > > Emergency Response Division > NOAA/NOS/OR&R (206) 526-6959 voice > 7600 Sand Point Way NE (206) 526-6329 fax > Seattle, WA 98115 (206) 526-6317 main reception > > chris.bar...@noaa.gov <mailto:chris.bar...@noaa.gov> > > > > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ > _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
