Message 206323 - Python tracker

Ethan Furman <report@bugs.python.org> wrote:
> The current meaning is unfortunate in that it is possible to want a type that
> can be used as an index or slice but that is still not a number, and in fact
> won't be used as a number in any scenario _except_ bin(), hex(), and oct().

memoryview, struct and probably also array.array accept __index__.