def setUp(self):
        ABCD = [[1.0, 0.0, 0.0, 0.044408783846879, -0.044408783846879],
                [0.999036450096481, 0.997109907515262, -0.005777399147297,
                 0.0, 0.499759089304780],
                [0.499759089304780, 0.999036450096481, 0.997109907515262,
                 0.0, -0.260002096136488],
                [0.0, 0.0, 1.0,  0.0, 0.0]]
        ABCD = np.array(ABCD)
        ntf, stf = ds.calculateTF(ABCD)
        ntf_zeros, ntf_poles, _ = ntf
        stf_zeros, stf_poles, _ = stf
        mntf_poles = np.array((1.498975311463384, 1.102565142679772,
                               0.132677264750882))
        mntf_zeros = np.array((0.997109907515262 + 0.075972576202904j,
                               0.075972576202904j - 0.997109907515262,
                               1.000000000000000 + 0.000000000000000j))
        mstf_zeros = np.array((-0.999999999999996,))
        mstf_poles = np.array((1.498975311463384, 1.102565142679772,
                               0.132677264750882))

        # for some reason, sometimes the zeros are in different order.
        self.ntf_zeros, self.mntf_zeros = (cplxpair(ntf_zeros),
                                           cplxpair(mntf_zeros))
        self.stf_zeros, self.mstf_zeros = (cplxpair(stf_zeros),
                                           cplxpair(mstf_zeros))
        self.ntf_poles, self.mntf_poles = (cplxpair(ntf_poles),
                                           cplxpair(mntf_poles))
        self.stf_poles, self.mstf_poles = (cplxpair(stf_poles),
                                           cplxpair(mstf_poles))
dataset/ETHPy150Open ggventurini/python-deltasigma/deltasigma/tests/test_calculateTF.py/TestCalculateTF.setUp/swapped operands of `-`