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

Partial reverse with no temporary list (replace range with xrange if you use Python 2):

def partial_reverse(list_, from_, to):
    for i in range(0, int((to - from_)/2)):
        (list_[from_+i], list_[to-i]) = (list_[to-i], list_[from_+i])

list_ = [1, 2, 3, 4, 5, 6, 7, 8]
partial_reverse(list_, 3, 7)
print(list_)