(Python)element at the equal interval from the end

Question

How to get [1,4,7] from the my_list [1,2,3,4,5,6,7,8,9], which is the list of elements at the equal interval(in this case, 3) "from the end" of the my_list?

my_list =[1,2,3,4,5,6,7,8,9]
# how to get  [1,4,7] from the list above?

Answer 1

if [1,4,7] is supposed to be the result this snipped of code should do the job

my_list=[1,2,3,4,5,6,7,8,9]
print(list(reversed(my_list[-3::-3])))

result

[1, 4, 7]