On 22 December 2017 at 20:55, Brett Cannon <br...@python.org> wrote: > > > On Fri, Dec 22, 2017, 11:38 Chris Barker, <chris.bar...@noaa.gov> wrote: > >> On Fri, Dec 22, 2017 at 8:49 AM, Brett Cannon <br...@python.org> wrote: >> >>> I think it's worth reminding people that if they don't like the fact >>>> dataclasses (ab)use type hints for their succinct syntax that you can >>>> always use attrs instead to avoid type hints. >>>> >>> >> sure -- but this doesn't really address the issue, the whole reason this >> is even a discussion is because dataclasses is going into the standard >> library. Third party packages can do whatever they want, of course. >> >> And the concern is that people (in particular newbies) will get confused >> / the wrong impression / other-negative-response by the (semi) use of >> typing in a standard library module. >> > > I'm still not worried. Type hints are part of the syntax and so are no > worse off than async/await and asyncio IMO. > > >> >>> As for those who feel dataclasses will force them to teach type hints >>> and they simply don't want to, maybe we could help land protocols >>> >> >> Could you please clarify what this is about ??? >> > > There's a PEP by Ivan (on my phone else I would look up the number). > > If anyone is curious this is PEP 544. It is actually already fully supported by mypy, so that one can play with it (you will need to also install typing_extensions, where Protocol class lives until the PEP is approved).
-- Ivan
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