How can I index this 3D array in Python? Why this output?

Question

#declaration of 3d array
a=[[[0]*3]*3]*3
https://code.sololearn.com/c6G38kyWflP4/?ref=app

Answer 1

print(a[0][1][2]) returns 6th 0 from the left.

Answer 2

That's a problem of python not Sololearn.
You can try this instead

a = [[[0]*3 for i in range(3)] for j in range(3)]
a[0][1][2]=1
print(a)

https://stackoverflow.com/questions/240178/list-of-lists-changes-reflected-across-sublists-unexpectedly

Answer 3

I think there is a problem in this app. If I try:
a[0][1][2]=1
print(a)

The output is not right