pandas.core.groupby.GroupBy.sum
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GroupBy.sum(self, **kwargs)[source] -
Compute sum of group values.
Returns: - Series or DataFrame
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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
