pandas.CategoricalIndex.remove_unused_categories¶

CategoricalIndex.remove_unused_categories(*args, **kwargs)[source]¶

Remove categories which are not used.

Parameters

inplacebool, default False: Whether or not to drop unused categories inplace or return a copy of this categorical with unused categories dropped.

Returns

catCategorical with unused categories dropped or None if inplace.

See also

rename_categories: Rename categories.
reorder_categories: Reorder categories.
add_categories: Add new categories.
remove_categories: Remove the specified categories.
set_categories: Set the categories to the specified ones.