python 2d array slice code example
Example 1: numpy 2d slicing
print(a2[:, 1]) # [2, 5, 8]
Example 2: How to select parts of a numpy array
import numpy as np
x = np.array([1,2,4,3,5,1,4,2])#create an array...
x[n]#where n is any value from the size of the array
#e.g. x[1] is 2, x[5] is 1.