How to create copy of a 3D list in python

Question

I have this code

list1 = [[[0, 0, 0], [0, 0, 0], [0, 0, 0]],
 [[0, 0, 0], [0, 0, 0], [0, 0, 0]],
 [[0, 0, 0], [0, 0, 0], [0, 0, 0]]]
list2 = list1
list1[0][0][0] = 2
print(list2)

I want to create a copy of list1 in list2 so that when I change the value in list1 it doesn't change the value in list2 also.

That doesn't seem to work, perhaps because it is a 3d list. – user3080600 Apr 12 '17 at 12:04 — user3080600, Apr 12 '17 at 12:04

score 1 · Accepted Answer · answered Apr 12 '17 at 12:06

1

You could use deepcopy

import copy
list1 = [[[0, 0, 0], [0, 0, 0], [0, 0, 0]],
 [[0, 0, 0], [0, 0, 0], [0, 0, 0]],
 [[0, 0, 0], [0, 0, 0], [0, 0, 0]]]
list2 = copy.deepcopy(list1)
list1[0][0][0] = 2
print(list2)

answered Apr 12 '17 at 12:06

kvorobiev

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How to create copy of a 3D list in python

1 Answers1