script client

#!/usr/bin/env python3

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

BUS_NAME = 'org.essai.blabla'

def get_url():
    bus = dbus.SessionBus()
    try:
        remote_object = bus.get_object(
            BUS_NAME,
            "/SomeObject"
        )
        url = remote_object.url(dbus_interface = BUS_NAME)
    except dbus.DBusException:
        print_exc()
        exit(1)
    return url

if __name__ == '__main__':
    loop = GLib.MainLoop()
    url = get_url()
    print(url)
    loop.run()

script serveur python

#!/usr/bin/env python3

import os

import dbus
import dbus.service
import dbus.mainloop.glib
from gi.repository import GLib

BUS_NAME = 'org.essai.blabla'

class SomeObject(dbus.service.Object):
    @dbus.service.method(BUS_NAME)
    def url(self):
        return "mon url"
    @dbus.service.method(BUS_NAME,
                         in_signature='', out_signature='')
    def Exit(self):
        mainloop.quit()

if __name__ == '__main__':

    dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
    mainloop = GLib.MainLoop()
      
    session_bus = dbus.SessionBus()
    name = dbus.service.BusName(BUS_NAME, session_bus)
    object = SomeObject(session_bus, '/SomeObject')
    mainloop.run()

service systemd

[Unit]
Description=mon service de test

[Service]
ExecStart=/usr/bin/script-server

# Restart the service on non-zero exit code when terminated by a signal other than SIGHUP, SIGINT, SIGTERM or SIGPIPE
Restart=on-failure