Answers for "groupby one column sum another"

1

python groupby sum single columns

df.groupby(['A','C'], as_index=False)['B'].sum()
Posted by: Guest on November-19-2020
0

sum group by pandas and create new column

df['new_column'] = df.groupby(['group_column'])['sum_column'].transform('sum')
Posted by: Guest on June-21-2021

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