pandas agg rename columns

df.groupby(lambda _ : True).agg(new_col_name = ('col_name', 'agg_function'))

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ALLAN KIZA 110 points

                                    grouped = df.groupby('id').agg({'col1': [('name1', 'sum')], 'col2': [('name2_mean', 'sum'), ('name2_custom_std', lambda x: np.std(x))]})
grouped.columns = grouped.columns.droplevel()

Thank you! 4

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