That’s a discussion for another day. On Sat, May 8, 2021 at 09:17 Thomas Grainger <tagr...@gmail.com> wrote:
> Would it be possible to drop the requirement that multiple exception types > are parenthesized? Is it only ambiguous with the old Python2 syntax? > > On Sat, 8 May 2021, 20:15 Guido van Rossum, <gu...@python.org> wrote: > >> I propose “exception tuple”, since syntactically and semantically it must >> be a tuple. (Same as for isinstance() and issubclass().) >> >> On Sat, May 8, 2021 at 05:52 Thomas Grainger <tagr...@gmail.com> wrote: >> >>> That's this bit: >>> >>> ``` >>> except (A, B): >>> ^^^^^^ >>> ``` >>> >>> bpo-43149 currently calls it an "exception group", but that conflicts >>> with PEP 654 -- Exception Groups and except* >>> >>> ``` >>> >>> >>> try: >>> ... pass >>> ... except A, B: >>> ... pass >>> Traceback (most recent call last): >>> SyntaxError: exception group must be parenthesized >>> ``` >>> >>> some alternatives: >>> >>> exception classinfo must be parenthesized (classinfo so named from the >>> parameter to issubclass) >>> exception sequence must be parenthesized >>> >>> see also: >>> >>> - https://github.com/python/cpython/pull/24467#discussion_r628756347 >>> - https://www.python.org/dev/peps/pep-0654/ >>> _______________________________________________ >>> 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/HSN6ESRB4BD6IUIPKLMNP4TPBQPWHBFK/ >>> Code of Conduct: http://python.org/psf/codeofconduct/ >>> >> -- >> --Guido (mobile) >> > -- --Guido (mobile)
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