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/pandas 0.25

pandas.core.groupby.GroupBy.sum

GroupBy.sum(self, **kwargs) [source]

Compute sum of group values.

Returns:
Series or DataFrame

Computed sum of values within each group.

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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.sum.html