def sum(self):
        """Summary

        Returns:
            TYPE: Description
        """
        return GroupedDataFrameWeld(
            grizzly_impl.groupby_sum(
                self.columns,
                self.column_types,
                self.grouping_columns,
                self.grouping_column_types
            ),
            self.grouping_column_names,
            self.column_names,
            self.grouping_column_types,
            self.column_types
        )
def sum ( self ) : return GroupedDataFrameWeld ( grizzly_impl . groupby_sum ( self . columns , self . column_types , self . grouping_columns , self . grouping_column_types ) , self . grouping_column_names , self . column_names , self . grouping_column_types , self . column_types )
Summary

        Returns:
            TYPE: Description