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/pandas 0.23

pandas.CategoricalIndex.remove_categories

CategoricalIndex.remove_categories(*args, **kwargs) [source]

Removes the specified categories.

removals must be included in the old categories. Values which were in the removed categories will be set to NaN

Parameters:

removals : category or list of categories

The categories which should be removed.

inplace : boolean (default: False)

Whether or not to remove the categories inplace or return a copy of this categorical with removed categories.

Returns:
cat : Categorical with removed categories or None if inplace.
Raises:

ValueError

If the removals are not contained in the categories

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Licensed under the 3-clause BSD License.
http://pandas.pydata.org/pandas-docs/version/0.23.4/generated/pandas.CategoricalIndex.remove_categories.html