Numpy find identical element in two arrays

Suppose I have an array a and b, how can I find the identical element in both arrays?

a = np.array([[262.5, 262.5, 45],
              [262.5, 262.5, 15],
              [262.5, 187.5, 45],
              [262.5, 187.5, 15],
              [187.5, 262.5, 45],
              [187.5, 262.5, 15],
              [187.5, 187.5, 45],
              [187.5, 187.5, 15]])

b = np.array([[262.5, 262.5, 45],
              [262.5, 262.5, 15],
              [3,3,5],
              [5,5,7],
              [8,8,9]])

I tried the code below, but the output is not what I want, can anyone tell me what is wrong with this code? or is there any other way to do it?

out = [x[(x == b[:,None]).all(1).any(0)] for x in a]

The output I want is:

array[[262.5, 262.5, 45],
      [262.5, 262.5, 15]]

>Solution :

a[np.all([np.isin(ai, b) for ai in  a], axis=1)]

or also:

b[np.all([np.isin(bi, a) for bi in  b], axis=1)]