_reverse_indexer(self) -> 'dict[Hashable, npt.NDArray[np.intp]]'
This is an internal function
dict of categories -> indexers
Compute the inverse of a categorical, returning a dict of categories -> indexers.
>>> c = pd.Categorical(list('aabca'))This example is valid syntax, but we were not able to check execution
... c ['a', 'a', 'b', 'c', 'a'] Categories (3, object): ['a', 'b', 'c']
>>> c.categories Index(['a', 'b', 'c'], dtype='object')This example is valid syntax, but we were not able to check execution
>>> c.codes array([0, 0, 1, 2, 0], dtype=int8)This example is valid syntax, but we were not able to check execution
>>> c._reverse_indexer() {'a': array([0, 1, 4]), 'b': array([2]), 'c': array([3])}See :
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