QtDBus demo with PyQt5

dbus_demo.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
from PyQt5 import QtCore, QtDBus, QtWidgets

def notify(header, msg):
    item = "org.freedesktop.Notifications"
    path = "/org/freedesktop/Notifications"
    interface = "org.freedesktop.Notifications"
    app_name = "dbus_demo"
    v = QtCore.QVariant(12321)  # random int to identify all notifications
    if v.convert(QtCore.QVariant.UInt):
        id_replace = v
    icon = ""
    title = header
    text = msg
    actions_list = QtDBus.QDBusArgument([], QtCore.QMetaType.QStringList)
    hint = []
    time = 100   # milliseconds for display timeout

    bus = QtDBus.QDBusConnection.sessionBus()
    if not bus.isConnected():
        print("Not connected to dbus!")
    notify = QtDBus.QDBusInterface(item, path, interface, bus)
    if notify.isValid():
        x = notify.call(QtDBus.QDBus.AutoDetect, "Notify", app_name,
                        id_replace, icon, title, text,
                        actions_list, hint, time)
        if x.errorName():
            print("Failed to send notification!")
            print(x.errorMessage())
    else:
        print("Invalid dbus interface")

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    window = QtWidgets.QMainWindow()
    window.show()
    notify("hello header", "some message!")
    sys.exit(app.exec_())