On Mon, Jul 13, 2020 at 10:07 Federico Salerno <salerno...@gmail.com> wrote:
> On 13/07/2020 12:28, Henk-Jaap Wagenaar wrote: > > No, that would not be impossible but fraught with problems. This is > discussed in the PEP: > > https://www.python.org/dev/peps/pep-0622/#algebraic-matching-of-repeated-names > > The PEP goes into no detail of what these problems (or "number of > subtleties") are, but it does mention how > > we decided to make repeated use of names within the same pattern an error; > we can always relax this restriction later without affecting backwards > compatibility > > which does hint at the fact that the problems are not insurmountable > hurdles. > > All in all not an urgent feature, but it would be nice to have from the > get-go if there is agreement and it is doable. > > I find it debatable that we should have this at all, since there are other interpretations possible, and honestly I doubt that it’s a common use case. That’s why we’re holding off. > > @PEP authors: Incidentally, I am eager to start contributing and see this > PEP advance—if there's anything I can do, including possibly non-code > "dirty work" please let me know. > I was thinking of collecting all the objections and points of contention > of the PEP and the current progress on each in one place so that the pros > and cons can be evaluated more clearly. Would that be useful? > Thanks for offering, but we’ve got that under control. —Guido > -- --Guido (mobile)
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