I think you need empty list so you can append the numbers to that i.e
FirstNumbers = [1, 2, 3]
SecondNumbers = [4, 5, 6]
ThirdNumbers = [7, 8, 9]
NestedNumbers = [FirstNumbers, SecondNumbers, ThirdNumbers]
m = []
for i in range(0, 3):
k = []
for each_number in NestedNumbers:
k.append(each_number[i])
m.append(k)
Output m : [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
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solved Creating a List of like Indicies [closed]