On 8/30/2020 7:25 AM, Steven D'Aprano wrote:
On Sun, Aug 30, 2020 at 09:56:28PM +1200, Greg Ewing wrote:
A thought just occurred to me. If we hadn't got rid of tuple unpacking in argument lists, we would have been able to write
def __getitem__(self, (x, y, z), **kwds): ... Indeed.
Now that Python is moving to a PEG parser, maybe we could consider tuple unpacking parameters again?
I was sad to see tuple arg unpacking go. But PEP 3113 doesn't mention parsability as a reason to remove it. And indeed, since it worked with the old parser, the PEG parser would presumably have no problem with it. PEP 3113 mentions introspection, which is why I grudgingly accept that it had to go. Maybe if someone solved that problem we could get them back. But that would be a major effort, separate from this proposal, and would of course require another PEP. Eric