Also nobody had a use case. On Fri, Jul 13, 2018 at 6:57 AM Chris Angelico <ros...@gmail.com> wrote:
> On Fri, Jul 13, 2018 at 11:36 PM, Random832 <random...@fastmail.com> > wrote: > > On Wed, Jul 11, 2018, at 20:10, Guido van Rossum wrote: > >> As anticippated, after a final round of feedback I am hereby accepting > PEP > >> 572, Assignment Expressions: https://www.python.org/dev/peps/pep-0572/ > > > > I know everyone else is probably sick of discussing this (I somehow > completely missed the discussion until it was almost done) but I have a > question... > > > > Why does this not allow assignment to attributes and subscripts? I think > this is, at least, surprising enough that there should be a rationale > section explaining it in the PEP. As it is, it's barely even explicitly > stated, other than the use of 'NAME' in a few places and an offhand mention > "and [the assignment statement] can assign to attributes and subscripts." > > > > It was discussed at some length, yes. Assignment to arbitrary targets > would also mean permitting iterable unpacking, which is not desired > ("x, y := 3, 4"??), and there weren't enough use-cases for > attribute/item assignment to justify creating a rule of "you can > assign to any single target, but can't unpack". In the future, if such > use-cases are found, the grammar can be expanded. > > ChrisA > _______________________________________________ > 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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