Question

How to combine two nested lists by summing element‑by‑element in Python

Answer 1

from itertools import chain

def sum_element_by_element_in_nested_lists(nested_list1, nested_list2):
   return [[x + y for x, y in zip(xs, ys)] for xs, ys in zip(nested_list1, nested_list2)]
 
nested_list1 = [[1, 2], [3, 9]]
nested_list2 = [[4, 8], [5, 6]]

print(sum_element_by_element_in_nested_lists(nested_list1, nested_list2))
 

 
'''
run:
 
[[5, 10], [8, 15]]

'''

 

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