pandas.Panel.groupby

Panel.groupby(function, axis='major')

Group data on given axis, returning GroupBy object

Parameters:

function : callable

Mapping function for chosen access

axis : {‘major’, ‘minor’, ‘items’}, default ‘major’

Returns:

grouped : PanelGroupBy

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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.Panel.groupby.html