def Lab2Msh(self, Lab):
        """
        Conversion of CIELAB to Msh
        """

        # unpack the Lab-array
        L, a, b = Lab.tolist()

        # calculation of M, s and h
        M = np.sqrt(np.sum(np.power(Lab, 2)))
        s = np.arccos(M/L)
        h = np.arctan2(b,a)
        return np.array([M,s,h])
    #-
dataset/ETHPy150Open ethankruse/kepler_orrery/diverging_map.py/ColorMapCreator.Lab2Msh/swapped operands of `/`