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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_moment(self, saxis=(0, 0, 1)):
 """ Get magnetic moment relative to a given spin quantization axis. If no axis is provided, moment will be given relative to the Magmom's internal spin quantization axis, i.e. equivalent to Magmom.moment :param axis: (list/numpy array) spin quantization axis :return: np.ndarray of length 3 """


        # transform back to moment with spin axis [0, 0, 1]
        m_inv = self._get_transformation_matrix_inv(self.saxis)
        moment = np.matmul(self.moment, m_inv)

        # transform to new saxis
        m = self._get_transformation_matrix(saxis)
        moment = np.matmul(moment, m)

        # round small values to zero
        moment[np.abs(moment) < 1e-8] = 0

        return moment