Why dose 'OneOf' object have no attribute 'is_a' (answered)

[William]

OneOf is regarded as atomic concept, So why dose 'OneOf' object have no attribute 'is_a'? It really could have one.

[Jiba]

Hi,

You mean, an empty is_a list ?

Jiba

[William]

Er...
I just got AttributeError: 'OneOf' object has no attribute 'is_a', when calling OneOf({something here}).is_a.
It is not about an empty list, it implies that is_a method is not defined in OneOf class.

[Jiba]

Yes, but logically, a OneOf class does not inherit from any other classes...

I've just added an is_a property to class constructs (most of them are classes).

Jiba