pandas agg rename columns

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Isidora
18 Jan 2021
1df.groupby(lambda _ : True).agg(new_col_name = ('col_name', 'agg_function'))
Janie
26 Nov 2016
1grouped = df.groupby('id').agg({'col1': [('name1', 'sum')], 'col2': [('name2_mean', 'sum'), ('name2_custom_std', lambda x: np.std(x))]})
2grouped.columns = grouped.columns.droplevel()
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