Hello, On Tue, 9 Feb 2021 08:56:02 +1000 Nick Coghlan <ncogh...@gmail.com> wrote:
> > After much deliberation, the Python Steering Council is happy to > > announce that we have chosen to accept PEP 634, and its companion > > PEPs 635 and 636, collectively known as the Pattern Matching PEPs. > > We acknowledge that Pattern Matching is an extensive change to > > Python and that reaching consensus across the entire community is > > close to impossible. Different people have reservations or > > concerns around different aspects of the semantics and the syntax > > (as does the Steering Council). In spite of this, after much > > deliberation, reviewing all conversations around these PEPs, as > > well as competing proposals and existing poll results, and after > > several in-person discussions with the PEP authors, we are > > confident that Pattern Matching as specified in PEP 634, et al, > > will be a great addition to the Python language. > > Thank you for resolving this discussion - I'm sure it wasn't an easy > decision. > > Obviously I think we're going to find things to regret in the way name > binding works in class and mapping patterns, but I also think using > "_ as name" as an explanatory tool is likely to cover most of them. > > I'll also consider submitting a PEP *adding* explicit patterns to the > implicit ones, rather than proposing to replace them, so the handling > of different kinds of bare expressions can be readily explained as > syntactic shorthand for more explicit operations rather than the > shorthand being the only available spelling. Also, +100 for resubmitting on its own just the part of PEP642 which adds "== EXPR" and "is EXPR" syntax, to match by expression value (i.e. where PEP642 initially started from). > I won't do that until after helping with the review of the main PEP > 634 implementation, though. > > Cheers, > Nick. -- Best regards, Paul mailto:pmis...@gmail.com _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/SE2YVL2XLCZGOZTHU5YNFLTES5KFFRB5/ Code of Conduct: http://python.org/psf/codeofconduct/
