> On Sep 27, 2019, at 12:52 PM, Andrew Barnert via Python-ideas 
> <python-ideas@python.org> wrote:
> 
> 
> On Friday, September 27, 2019, 07:47:41 AM PDT, Johnny Dahlberg 
> <svartchimp...@gmail.com> wrote:
> 
> > My proposal: Implement `@dataclass(slots=True)` which does the same thing 
> > as attrs: Replaces the class with a modified class that has a `__slots__` 
> > property instead of a `__dict__`. And fully supporting default values in 
> > the process.
> 
> I don't think anyone would be against this in principle; the question is 
> implementing it, and bikeshedding. For example, if nobody's come up with a 
> better implementation than Eric's original one, should we add a 
> @dataclass_slots decorator, or a @slotsify that you put around @dataclass, or 
> get rid of the guarantee that @dataclass returns your class with extra 
> dunders.
> 
> IIRC, the consensus after the discussion at the time was that this was a 
> feature that could be added later, after a bit more experience in the field 
> (and maybe someone will come up with a better implementation by then), so it 
> was just deferred to the future rather than rejected.
> 
> Meanwhile, the @slotsify or @dataclass_slots should be writable as a PyPI 
> package. Has anyone done that? If there's a popular and stable 
> implementation, that's a good argument for merging it into the stdlib (and 
> leaving it on PyPI as a backport). If it turned out to be tricky to implement 
> without modifying dataclass itself, explaining why could also be a good 
> argument for moving it into the stdlib.

I keep threatening to add a more-dataclasses (or similar) to PyPI. Maybe I’ll 
actually get around to it now and add this decorator. 

Eric

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