non mutable reverse in python code example

Example 1: how to reverse array in python

a = [1,2,3,4]
a = a[::-1]
print(a)
>>> [4,3,2,1]

Example 2: list slicing reverse python

#This option produces a reversed copy of the list. Contrast this to mylist.reverse() which
#reverses the original list
>>> mylist
[1, 2, 3, 4, 5]

>>> mylist[::-1]
[5, 4, 3, 2, 1]