NumPy first and last element from array

I am trying to dynamically get the first and last element from an array.

So, let us suppose the array has 6 elements.

test = [1,23,4,6,7,8]

If I am trying to get the first and last = 1,8, 23,7 and 4,6. Is there a way to get elements in this order? I looked at a couple of questions Link Link2. I took help of these links and I came up with this prototype..

#!/usr/bin/env python

import numpy

test = [1,23,4,6,7,8]
test1 = numpy.array([1,23,4,6,7,8])
len_test = len(test)
first_list = [0,1,2]
len_first = len(first_list)
second_list = [-1,-2,-3]
len_second = len(second_list)

for a in range(len_first):
        print numpy.array(test)[[first_list[a] , second_list[a]]]
        print test1[[first_list[a], second_list[a]]]

But this prototype won't scale for if you have more than 6 elements. So, I was wondering if there is way to dynamically get the pair of elements.

Thanks!