How to create in python3 a list of repeated lists without the new list being affected by a change in the original small list?

Question

init = [[0,1],[10,11]]
constr1 = [init for _ in range(5)]
constr2 = init * 5

First question, why the above 2 constructed lists do not give the same result and they are instead

constr1 
[[[0, 1], [10, 11]],
[[0, 1], [10, 11]],
[[0, 1], [10, 11]],
[[0, 1], [10, 11]],
[[0, 1], [10, 11]]]

constr2
[[0, 1], [10, 11],
[0, 1], [10, 11],
[0, 1], [10, 11],
[0, 1], [10, 11],
[0, 1], [10, 11]]

And the other question is if I edit the initial list

init[0][1]=2

then we can see that both constr1 and constr2 have been affected and they are

[[[0, 2], [10, 11]],
[[0, 2], [10, 11]],
[[0, 2], [10, 11]],
[[0, 2], [10, 11]],
[[0, 2], [10, 11]]]

and

[[0, 2], [10, 11],
[0, 2], [10, 11],
[0, 2], [10, 11],
[0, 2], [10, 11],
[0, 2], [10, 11]]

So what is the way to get a constructed list (by repetition of list init) and the constr list NOT being affected by any subsequent changes in the init list? NOTE I also tried the line (after clearing all my variables by restarting my python shell)

constr1 = [init[:] for _ in range(5)]

and still it is affected by a change in init[0][1]

Answer 1

OK , after finding the Untie nested lists created by repetition? I tried this and it worked

init = [[0,1],[10,11]]
from copy import deepcopy
constr1 = [deepcopy(init) for _ in range(5)]

Now a change in

init[0][1] = 2

does not affect the

constr1
[[[0, 1], [10, 11]],
 [[0, 1], [10, 11]],
 [[0, 1], [10, 11]],
 [[0, 1], [10, 11]],
 [[0, 1], [10, 11]]]