CategoricalIndex.fillna(value, downcast=None)

CategoricalIndex.item()

CategoricalIndex.identical(other)

CategoricalIndex.is_floating()

CategoricalIndex.ordered

CategoricalIndex.dtype_str = None

CategoricalIndex.append(other)

CategoricalIndex.max(*args, **kwargs)

CategoricalIndex.factorize(sort=False, na_sentinel=-1)

CategoricalIndex.base return the base object if the memory of the underlying data is shared