Contruct 3d array in numpy from existing 2d array

Question

During preparing data for NumPy calculate. I am curious about way to construct:

myarray.shape => (2,18,18)

from:

d1.shape          


        

Answer 1

arr3=np.dstack([arr1, arr2])

arr1, arr2 are 2d array shape (256,256), arr3: shape(256,256,2)