pandas.core.groupby.DataFrameGroupBy.cumsum

DataFrameGroupBy.cumsum(axis=0, *args, **kwargs) [source]: Накопленная сумма для каждой группы.

См. также

pandas.Series.groupby, pandas.DataFrame.groupby, pandas.Panel.groupby

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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.24.2/reference/api/pandas.core.groupby.DataFrameGroupBy.cumsum.html