[Python-Dev] Re: a name for the ExceptHandler.type when it is a literal tuple of types
I opened a new thread here: https://mail.python.org/archives/list/python-id...@python.org/thread/WQOMBT4Z22EIFB53WN54E52AYS3QBKAV/ ___ 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/VGXHBXGKOYOKUP6TAEJIZVYBY2QFVPR2/ Code of Conduct: http://python.org/psf/codeofconduct/
[Python-Dev] Re: a name for the ExceptHandler.type when it is a literal tuple of types
That’s a discussion for another day. On Sat, May 8, 2021 at 09:17 Thomas Grainger 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, 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 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) ___ 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/ZYKTQJDZN3T63ZAUZZ7BLFGYOJVNOSPJ/ Code of Conduct: http://python.org/psf/codeofconduct/
[Python-Dev] Re: a name for the ExceptHandler.type when it is a literal tuple of types
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, 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 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) > ___ 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/3EW75R7I4IYIBKKVPBW333ZBYMPB5YGR/ Code of Conduct: http://python.org/psf/codeofconduct/
[Python-Dev] Re: a name for the ExceptHandler.type when it is a literal tuple of types
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 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) ___ 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/62WTPW24K3XNOYJNTBC6DWBGZHHKF2L5/ Code of Conduct: http://python.org/psf/codeofconduct/
[Python-Dev] Re: a name for the ExceptHandler.type when it is a literal tuple of types
There's a PR to use "SyntaxError: multiple exception types must be parenthesized" https://github.com/python/cpython/pull/25996 On Sat, 8 May 2021, 19:20 Gregory P. Smith, wrote: > > > On Sat, May 8, 2021 at 8:54 AM Thomas Grainger 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/ > > > Given it requires ()s it is probably better to call it an "exception > sequence" or even go fully to "exception tuple" in order to avoid confusion > and tie in with the other meanings of the required syntax. > > -gps > ___ 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/2ZHLIOVQG27EUJLXQYMTQUB6Z67MNJ4I/ Code of Conduct: http://python.org/psf/codeofconduct/
[Python-Dev] Re: a name for the ExceptHandler.type when it is a literal tuple of types
On Sat, May 8, 2021 at 8:54 AM Thomas Grainger 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/ Given it requires ()s it is probably better to call it an "exception sequence" or even go fully to "exception tuple" in order to avoid confusion and tie in with the other meanings of the required syntax. -gps ___ 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/Y7SPN4WSXXFPAZITS2PMF2PRSVX3H5SE/ Code of Conduct: http://python.org/psf/codeofconduct/
