python how to go reverse in a list code example

Example 1: reverse element in a list in python 3

my_list = [1, 7, 9, 11, 12, 20]
# Reverse a list by using a slice
print(my_list[::-1])

Example 2: how to reverse array in python

>>> L = [0,10,20,40]
>>> L[::-1]
[40, 20, 10, 0]