On 30 July 2017 at 16:24, Nick Coghlan <ncogh...@gmail.com> wrote: > Rather than being about any changes on that front, these threads are > mostly about making it possible to write that first line as: > > MyNT = type(implicitly_typed_named_tuple_factory(foo=None, bar=None))
Is that really true, though? There's a lot of discussion about whether ntuple(x=1, y=2) and ntuple(y=2, x=1) are equal (which implies they are the same type). If there's any way they can be the same type, then your definition of MyNT above is inherently ambiguous, depending on whether we've previously referred to implicitly_typed_named_tuple_factory(bar=None, foo=None). For me, the showstopper with regard to this whole discussion about ntuple(x=1, y=2) is this key point - every proposed behaviour has turned out to be surprising to someone (and not just in a "hmm, that's odd" sense, but rather in the sense that it'd almost certainly result in bugs as a result of misunderstood behaviour). Paul _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
