# Python program explaining
# vstack() function
import numpy as geek
# input array
in_arr1 = geek.array([ 1, 2, 3] )
print ("1st Input array :
", in_arr1)
in_arr2 = geek.array([ 4, 5, 6] )
print ("2nd Input array :
", in_arr2)
# Stacking the two arrays vertically
out_arr = geek.vstack((in_arr1, in_arr2))
print ("Output vertically stacked array:
", out_arr)