how to select elements from array code example

Example 1: select certain element from ndarray python

# arr = [elements]
# new_arr = arr[condition]  
# new_arr = [lements satisfying condition]
arr = [3, 6, 5, 9, 4, 12, 1]
new_arr = arr[arr%2 == 0]
new_arr = [6, 4, 12]

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.