every second element in list python code example

Example 1: get every nth element in list python

start_from = 0
every_nth = 2
a_list[start_from::every_nth]

Example 2: python every other goes to a list

a = [1, 2, 3, 4, 5]
a[1::2]
# returns 2, 4
a[::2]
#returns 1, 3, 5