pandas.CategoricalIndex.asof
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CategoricalIndex.asof(label) -
For a sorted index, return the most recent label up to and including the passed label. Return NaN if not found.
See also
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get_loc - asof is a thin wrapper around get_loc with method=’pad’
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.CategoricalIndex.asof.html
