Detectar cambios en jack

from gi.repository import Gtk
import dbus
from dbus.mainloop.glib import DBusGMainLoop

DBusGMainLoop(set_as_default=True)

bus = dbus.SessionBus()
jack_control = bus.get_object ("org.jackaudio.service", "/org/jackaudio/Controller")
jack_control_interface = dbus.Interface(jack_control, "org.jackaudio.JackPatchbay")

def printPorts(new_graph_version):
  port_list = jack_control_interface.GetAllPorts()
  print(port_list)

jack_control_interface.connect_to_signal("GraphChanged", printPorts)

Gtk.main()