My feeling is that limiting it to strings is fine, but checking those strings for resembling identifiers is pointless and wasteful.
On Tue, Oct 9, 2018 at 9:40 AM Jeff Hardy <jdha...@gmail.com> wrote: > On Sun, Oct 7, 2018 at 3:45 PM Terry Reedy <tjre...@udel.edu> wrote: > > > > On 10/7/2018 1:34 PM, Chris Barker via Python-Dev wrote: > > > On Fri, Oct 5, 2018 at 3:01 PM Brett Cannon <br...@python.org > > > <mailto:br...@python.org>> wrote: > > > > > > I'm also fine with saying that keys in **kwargs that are not proper > > > identifiers is an implementation detail. > > > > > > > > > It's not just **kwargs -- you can also use arbitrary names with > > > setattr() / getattr() : > > > > > > In [6]: setattr(foo, "4 not an identifier", "this works") > > > > > > In [7]: getattr(foo, "4 not an identifier") > > > Out[7]: 'this works' > > > > When this behavior of set/getattr was discussed a decade or so ago, > > Guido said not to disable it, but I believe he said it should not be > > considered a language feature. There are other situations where CPython > > is 'looser' than the spec. > > From an alternative implementation point of view, CPython's behaviour > *is* the spec. Practicality beats purity and all that. > > - Jeff > _______________________________________________ > 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 (mobile)
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