How do I reverse a sublist in a list in place?

Question

I\'m supposed to create a function, which input is a list and two numbers, the function reverses the sublist which its place is indicated by the two numbers. for example this is

Answer 1

lst[::-1] is the idiomatic way to reverse a list in Python, The following show how and that it was in-place:

>>> lst = [1, 2, 3, 4, 5]
>>> id(lst)
12229328
>>> lst[:] = lst[::-1]
>>> lst
[5, 4, 3, 2, 1]
>>> id(lst)
12229328