pandas.Series.cat.remove_categories
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Series.cat.remove_categories(*args, **kwargs)[source]
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Removes the specified categories. removalsmust be included in the old categories. Values which were in the removed categories will be set to NaNParameters: 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.
    https://pandas.pydata.org/pandas-docs/version/0.20.3/generated/pandas.Series.cat.remove_categories.html