> But I can’t see an argument that something called Subscriptable could (or should) actually mean indexable rather than subscriptable.

Now we are getting into naming things, which is hard, but not the critical step.

But as you point out, it’s actually not that clear exactly what the OP (or anyone else advocating for a new ABC) wants. So we need to know:

Exactly what Interface would this new ABC imply? 

How/why would it be used?

Ideally with a non-toy example or two.


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