pandas.core.groupby.GroupBy.cumsum

GroupBy.cumsum(self, axis=0, *args, **kwargs) [source]

Cumulative sum for each group.

Returns:	Series or DataFrame

See also

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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.25.0/reference/api/pandas.core.groupby.GroupBy.cumsum.html