Code

Question

number = 3
things = ["string", 0, [1, 2, number], 4.56]
print(things[1])
print(things[2])
print(things[2][2])

What does it mean print(things[2][2])

Answer 1

2 number element of things is[1,2,number].
2 number element. of [1,2, number] is number.
things[2][2]=number.

here, number=3, is given
things [2][2]=3
so answer is 3.

Answer 2

"string" is 0th in things list
0 is 1st
[1,2,number] is 2nd
4.56 is 3rd

things[2] points [1,2,number]
and things[2][2] points second element of second element in things which is number variable.