python - How to add corresponding values of columns and filter

Question

    df
    a   b   c d
0  10  20  30 2020
1  11  21  31 2021
2  12  22  32 2022

I want a result which returns a+b+c for year 2020,

I should get 60 answer

please help

Answer 1

Here is my 2 cents:

df.loc[df.d==2020,['a','b','c']].values.sum()

#60