pandas sum multiple columns groupby

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Kamelia
10 Feb 2017
1df.groupby(['col1','col2']).agg({'col3':'sum','col4':'sum'}).reset_index()
2
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Luciano
01 Sep 2018
1#UPDATED (June 2020): Introduced in Pandas 0.25.0, 
2#Pandas has added new groupby behavior “named aggregation” and tuples, 
3#for naming the output columns when applying multiple aggregation functions 
4#to specific columns.
5
6df.groupby(
7     ['col1','col2']
8 ).agg(
9     sum_col3 = ('col3','sum'),
10     sum_col4     = ('col4','sum'),
11 ).reset_index()
12
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