Infinitive loop with dbus and kivy (logging)

client.py

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.widget import Widget

import dbus.service
from dbus.mainloop.glib import DBusGMainLoop


class UI(Widget):
    def __init__(self, **kwargs):
        super(UI, self).__init__(**kwargs)
        
        #Add check button
        button=Button(text='Lets Crash!')
        button.bind(on_press=self.check_dbus)
        self.add_widget(button)
    
    
    def check_dbus(self, *kwargs):
        '''Call do_math on kivy1
        '''        
        self.bus = dbus.SessionBus()
        server = self.bus.get_object('org.test.kivy1', '/kivy1')
        server.do_math(2, dbus_interface = 'org.test.kivy1')


class Client(App):
    def build(self):
        return UI()

if __name__ == '__main__':
    Client().run()

server.py

from kivy.app import App
from kivy.uix.widget import Widget
#from kivy.support import install_gobject_iteration

import dbus.service
from dbus.mainloop.glib import DBusGMainLoop

    
class DBusServer(dbus.service.Object):
    
    def __init__(self):
        bus_name = dbus.service.BusName('org.test.kivy1', bus=dbus.SessionBus())
        dbus.service.Object.__init__(self, bus_name, '/kivy1')
 
 
    @dbus.service.method('org.test.kivy1')
    def do_math(self, number):
        return
    
DBusGMainLoop(set_as_default=True)



class Client(App):
    def build(self):
        #Do not call install_gobject_iteration() => Otherwise it won't fail!
        #install_gobject_iteration()
        dbs = DBusServer()
        return Widget()

if __name__ == '__main__':
    Client().run()