CategoricalIndex.holds_integer()

CategoricalIndex.difference(other)

CategoricalIndex.value_counts(normalize=False, sort=True, ascending=False, bins=None, dropna=True)

CategoricalIndex.name = None

CategoricalIndex.nlevels

CategoricalIndex.argmin(axis=None)

CategoricalIndex.is_monotonic_decreasing return if the index is monotonic decreasing (only

CategoricalIndex.sortlevel(level=None, ascending=True, sort_remaining=None)

CategoricalIndex.size return the number of elements in the underlying data

CategoricalIndex.join(other, how='left', level=None, return_indexers=False)