On Sat, Sep 28, 2019 at 2:26 PM Ricky Teachey <ri...@teachey.org> wrote:
> > But it would silently do nothing if there was no class decorator to look >> at it. >> > > This doesn't seem like such a big deal to me. It would simply be the way > slots works. > I was thinking it's currently an error. And you chose a name (__slot_conflics__) suggesting that there still was a problem. But yeah, maybe other than that it's no big deal. > However if we did `__slots__ = "__auto__"` then we might finagle it so >> that the initializers could be preserved: >> >> class C: >> __slots__ = "__auto__" # or MRAB's suggested __slots__ = ... >> x: float = 0.0 >> y: float = 0.0 >> > > I do like this idea a lot. > > Saving, or preserving, the initialized values somewhere is mainly what I > was driving at with the so called __slots_conflicts__ idea. Perhaps instead > the slots descriptor object could store the value? Something like: > > class C: > __slots__ = ... > x: float = 0.0 > y: float = 0.0 > > assert C.x.__value__ == 0.0 > assert C.y.__value__ == 0.0 > Why not -- they have to go somewhere. :-/ > If that becomes the way this is solved, should slots be made to also > accept a dict to create starting values? > > class C: > __slots__ = dict(x = 0.0, y = 0.0) > > assert C.x.__value__ == 0.0 > assert C.y.__value__ == 0.0 > >> But what would be the use case for that? When would you ever prefer to write this rather than the first version? I guess if the slots are computed -- but who uses computed slots nowadays? -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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