def test_filter_ips_white_list(self):
        CONF.network_label_regex = '.*'
        CONF.ip_regex = '^(15.|123.)'
        CONF.black_list_regex = '^10.123.123.*'
        ip = self.instance.get_visible_ip_addresses()
        ip = filter_ips(
            ip, CONF.ip_regex, CONF.black_list_regex)
        self.assertEqual(2, len(ip))
        self.assertTrue('123.123.123.123' in ip)
        self.assertTrue('15.123.123.123' in ip)
def mmf(f, title='', ax=0):
    """plot magnetomotive force (mmf) of winding"""
    if ax == 0:
        ax = plt.gca()
    if title:
        ax.set_title(title)
    ax.plot(np.array(f['pos'])/np.pi*180, f['mmf'])
    ax.plot(np.array(f['pos_fft'])/np.pi*180, f['mmf_fft'])
    ax.set_xlabel('Position / Deg')

    phi = [f['alfa0']/np.pi*180, f['alfa0']/np.pi*180]
    y = [min(f['mmf_fft']), 1.1*max(f['mmf_fft'])]
    ax.plot(phi, y, '--')
    alfa0 = round(f['alfa0']/np.pi*180, 3)
    ax.text(phi[0]/2, y[0]+0.05, f"{alfa0}°",
            ha="center", va="bottom")
    ax.annotate(f"", xy=(phi[0], y[0]),
                xytext=(0, y[0]), arrowprops=dict(arrowstyle="->"))
    ax.grid()