Here's an idea I was toying with in thinking about the problem this evening.
Currently, python complains if you try to add a class member that will conflict with a slot: >>> class C: ... __slots__="x" ... x=1 ... Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: 'x' in __slots__ conflicts with class variable What if the slots machinery were changed so that there was a warning propagated instead, and the conflicting member value(s) were saved in some appropriate place in the class namespace? Maybe something like __slot_conflicts__, or something like that. >>> class C: ... __slots__="x" ... x=1 ... >>> C.__slot_conflicts__["x"] 1 This would give the decorator the opportunity to find the stuff that was put in those fields, and sort out the class definition in an expected way. --- Ricky. "I've never met a Kentucky man who wasn't either thinking about going home or actually going home." - Happy Chandler On Fri, Sep 27, 2019 at 9:39 PM Andrew Barnert via Python-ideas < python-ideas@python.org> wrote: > On Sep 27, 2019, at 17:20, Guido van Rossum <gu...@python.org> wrote: > > > > Thinking aloud, perhaps this could be done by setting __slots__ to a > magical value, e.g. > > > > class Point: > > __slots__ = "__auto__" > > x: float > > y: float > > Would this confuse any existing automated tools (or dataclass-like > libraries) into thinking you’re declaring slots named _, a, u, t, and o? > > (I don’t think there’s any danger of confusing human readers, at least.) > > _______________________________________________ > 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/TPCZH4BZYPWCHMYTHZXDQSBHAZ5LSG62/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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