Good point. -- Eric
> On Jul 29, 2021, at 3:18 AM, Thomas Grainger <tagr...@gmail.com> wrote: > > > But heterogeneous iteration would require typing changes > >> On Thu, 29 Jul 2021, 02:18 Eric V. Smith, <e...@trueblade.com> wrote: >> In dataclasses, support for __slots__ is being added in 3.10. Adding >> optional support for iteration would be easy. >> >> -- >> Eric V. Smith >> >>>> On Jul 28, 2021, at 7:29 PM, Paul Bryan <pbr...@anode.ca> wrote: >>>> >>> >>> I'm with you; since dataclasses were introduced, namedtuple has not see any >>> use from me, though none of my uses have demanded ultra-high efficiency >>> either. >>> >>> I wonder how many users are currently relying on namedtuple __getitem__ >>> semantics though. that's functionality dataclasses do not (currently) have. >>> >>> Random thought I don't know the answer to: Any reason __slots__ can't be >>> used on a dataclass to improve efficiency? >>> >>> >>>> On Wed, 2021-07-28 at 22:22 +0000, pa...@lexyr.com wrote: >>>> [Migrating the discussion from https://bugs.python.org/issue44768.] >>>> >>>> PEP 20 says: >>>> >>>>> There should be one-- and preferably only one --obvious way to do it. >>>> >>>> There are two ways to create a simple named type to store data: >>>> collections.namedtuple and dataclasses.dataclass. I propose deprecating >>>> namedtuple. >>>> >>>> As far as the interface is concerned, the namedtuple is almost completely >>>> equivalent to a frozen dataclass - with some iterability syntactic sugar >>>> thrown in. I don't think there are use cases for namedtuple that would not >>>> be trivial to rewrite with dataclasses. >>>> >>>> As far as the implementation is concerned, the namedtuple is faster. If >>>> efficiency is a concern, why do we make our users decide? We can choose >>>> the most efficient one on the library's end. C++ does something similar >>>> with bool vectors - the library has a special case for where it would be >>>> more optimal to use a different data structure underneath. >>>> >>>> >>>> TL;DR: If dataclass is so good, why keep namedtuple around? >>>> _______________________________________________ >>>> Python-ideas mailing list -- python-ideas@python.org >>>> To unsubscribe send an email to python-ideas-le...@python.org >>>> https://mail.python.org/mailman3/lists/python-ideas.python.org/ >>>> Message archived at >>>> https://mail.python.org/archives/list/python-ideas@python.org/message/UQRCDWMFNC5NRLLQCTYPOEGWJOIV7BGJ/ >>>> Code of Conduct: http://python.org/psf/codeofconduct/ >>> >>> _______________________________________________ >>> Python-ideas mailing list -- python-ideas@python.org >>> To unsubscribe send an email to python-ideas-le...@python.org >>> https://mail.python.org/mailman3/lists/python-ideas.python.org/ >>> Message archived at >>> https://mail.python.org/archives/list/python-ideas@python.org/message/4NOUPTLNNJJMM3XSN3WEK32NWRJDAVRD/ >>> Code of Conduct: http://python.org/psf/codeofconduct/ >> _______________________________________________ >> Python-ideas mailing list -- python-ideas@python.org >> To unsubscribe send an email to python-ideas-le...@python.org >> https://mail.python.org/mailman3/lists/python-ideas.python.org/ >> Message archived at >> https://mail.python.org/archives/list/python-ideas@python.org/message/ESOIUHFM26SPCLP4VZCY7WETXJWFVBOC/ >> Code of Conduct: http://python.org/psf/codeofconduct/
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