How to get the indices list of all NaN value in numpy array?

Say now I have a numpy array which is defined as,


Now I want to have a list that contains all the indices of the missing values, which is [(1,2),(2,0)] at this case.

Is there any way I can do that?

np.isnan combined with np.argwhere

    x = np.array([[1,2,3,4],


    array([[1, 2],
           [2, 0]])