Cross join addition with 2D lists

Question

I created a post earlier regarding cross joining two lists with addition. However, suppose I have two lists that are two dimensional.

For Example:

list1 = ([5,2,8],[1,2,3])
list2 = ([11,6,3],[3,2,1])
sum_list = []

My expected output would be:

print (sum_list)

Output:
[16,11,8],[8,7,6],
[13,8,5], [5,4,3],
[19,14,11],[11,10,9],
[12,7,4],[4,3,2],
[13,8,5],[5,4,3],
[14,9,6],[6,5,4]

Answer 1

I honestly do not know why you would do this, but heres the code:

list1 = ([5,2,8],[1,2,3])
list2 = ([11,6,3],[3,2,1])
sum_list = []

for i in list1:
  for j in i:
    for k in list2:
      templ=[]
      for l in k:
        templ.append(j+l)
      sum_list.append(templ)

print(sum_list)