pandas.CategoricalIndex.get_indexer_non_unique
CategoricalIndex.get_indexer_non_unique(target)-
this is the same for a CategoricalIndex for get_indexer; the API returns the missing values as well
© 2008–2012, AQR Capital Management, LLC, Lambda Foundry, Inc. and PyData Development Team
Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.CategoricalIndex.get_indexer_non_unique.html