Print app-name of notifications

[pysen]

First off, great tool! (Stort tack Erik!)

I'm looking through the swaync-client utility and I can't find an easy way to list the "app-name" to use when setting notification priorities in the configuration file. The python code snippet below based on this does the job:

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

def print_notification(bus, message):
  keys = ["app_name", "replaces_id", "app_icon", "summary",
          "body", "actions", "hints", "expire_timeout"]
  args = message.get_args_list()
  if len(args) == 8:
    notification = dict([(keys[i], args[i]) for i in range(8)])
    print(notification["app_name"],notification["summary"], notification["body"])

loop = DBusGMainLoop(set_as_default=True)
session_bus = dbus.SessionBus()
session_bus.add_match_string("type='method_call',interface='org.freedesktop.Notifications',member='Notify',eavesdrop=true")
session_bus.add_message_filter(print_notification)

GLib.MainLoop().run()

Sway for example has the swaymsg -t get_tree that is very useful to figure out the name / app_id for a window when doing workspace assignments.

Is something similar available in the swaync-client?