On 1/11/21 5:28 PM, Guido van Rossum wrote:
On Mon, Jan 11, 2021 at 5:21 PM Larry Hastings <[email protected] <mailto:[email protected]>> wrote:__slots__ itself doesn't behave that way, but subclasses do inherit the slots defined on their parent:Slots intelligently support inheritance, too. I always kind of wondered why annotations didn't support inheritance--if D is a subclass of C, why doesn't D.__annotations__ contain all C's annotations too? But we're way past reconsidering that behavior now.Anyway, `__slots__` doesn't behave that way -- seems it behaves similar to `__annotations__`.
class C:
__slots__ = ['a']
class D(C):
__slots__ = ['b']
d = D()
d.a = 5
d.b = "foo"
print(f"{d.a=} {d.b=}")
prints
d.a=5 d.b='foo'
That's the inheritance behavior I was referring to.
Cheers,
//arry/
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