Comparing two numpy arrays and removing elements

Question

I have been going through several solutions, but I am not able to find a solution I need.

I have two numpy arrays. Let\'s take a small example<

Answer 1

Simply pass the negated version of boolean array returned by np.in1d to array x:

>>> x = np.array([1,2,3,4,5,6,7,8,9])
>>> y = [3,4,5]
>>> x[~np.in1d(x, y)]
array([1, 2, 6, 7, 8, 9])