How can I reverse a list in Python?

Question

How can I do the following in Python?

array = [0, 10, 20, 40]
for (i = array.length() - 1; i >= 0; i--)

I need to have the elements of a

Answer 1

def reverse(my_list):
  L = len(my_list)
  for i in range(L/2):
    my_list[i], my_list[L-i - 1] = my_list[L-i-1], my_list[i]
  return my_list