How to remove items from an array that are existing in another array in Python Numpy?

Question(s):

How to remove items from an array that are existing in another array in Python Numpy?

Sample Answer:

We can use the Numpy method setdiff1d() to remove items from one array that are existing in another array.

Following is an example code:

ar1 = np.array([9,8,5,6,4,3,1])
ar2 = np.array([6,3,7,0,1])

newAr = np.setdiff1d(ar1,ar2)

Output:
array([9,8,5,4,0])