Question

The following code include the last number.

>>> numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> numbers[::3]
[1, 4, 7, 10]

Why does not includet the last number 2, like 10, 8, 6, 4, 2?

>>> numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> numbers[:1:-2]
[10, 8, 6, 4]

Answer 1

It seems that the slice operator is simply non-inclusive of the second argument. In other-words, your 1 should be a 0:

>>> numbers = [1,2,3,4,5,6,7,8,9,10]
>>> numbers[:1:-2]
[10, 8, 6, 4]
>>> numbers[:0:-2]
[10, 8, 6, 4, 2]

Hope that helps 🙂

For further info, see Note 5 here.