Question

How to sum each dimensional separately from 2D list (list of lists) in Python

Answer 1

a_list = [[1, 2, 3], [4, 5, 6]]

r_list = []
r_list = [sum(x) for x in a_list]
print(r_list)


'''
run:

[6, 15]

'''

 

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Answer 2

a_list = [[1, 2, 3], [4, 5, 6]]

r_list = []
r_list = list(map(sum, a_list))
print(r_list)


'''
run:

[6, 15]

'''

 

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Answer 3

a_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

r_list = []
r_list = list(map(sum, a_list))

print(r_list)
print(r_list[0])
print(r_list[1])
print(r_list[2])


'''
run:

[6, 15, 24]
6
15
24

'''

 

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