Numpy (5)

How to replace items that satisfy a condition with another value in numpy array?

arr = np.array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])

Output

 

array([ 0, -1,  2, -1,  4, -1,  6, -1,  8, -1])

 

# input
arr[arr % 2 == 1] = -1
arr

# output

array([ 0, -1,  2, -1,  4, -1,  6, -1,  8, -1])