_has_nested_classes

skactiveml.utils._has_nested_classes(classes)

Check whether classes contains one vocabulary per target label.

Parameters:

classesobject

Candidate class specification. Single-output class specifications are expected to be one-dimensional iterables of scalar labels. Nested specifications are expected to contain one iterable per target label.

Returns:

has_nested_classesbool

True if classes has a nested structure and False otherwise.

Raises:

TypeError

If classes or one of its nested class vocabularies is a one-shot iterator.

ValueError

If classes is an empty iterable.