a = numpy.array([[0.0, 1.0, 2.0, 3.0, 4.0], [7.0, 8.0, 9.0, 10.0, 4.0], [
    14.0, 15.0, 16.0, 17.0, 4.0], [1.0, 20.0, 21.0, 22.0, 23.0], [27.0, 
    28.0, 1.0, 20.0, 29.0]])
print(numpy.argwhere(a == 4.0))
Coordinates of item on numpy array