Also nobody had a use case.
On Fri, Jul 13, 2018 at 6:57 AM Chris Angelico rosuav@gmail.com wrote:
On Fri, Jul 13, 2018 at 11:36 PM, Random832 random832@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.
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