get_list_of_windows

#!/usr/bin/env python3

# Author: Andrew Shark

# This script lists windows in kwin on wayland. It is useful, because wmctrl does not work on wayland.
# I read journalctl because printing in kwin script is currently broken. See https://bugs.kde.org/show_bug.cgi?id=445058
# https://unix.stackexchange.com/questions/706477/is-there-a-way-to-get-list-of-windows-on-kde-wayland - described this script here.

import subprocess
from datetime import datetime


def get_list_of_windows():
   datetime_now = datetime.now()

   script = "/home/andrey/bin/list_windows.js"

   reg_script_number = subprocess.run("dbus-send --print-reply --dest=org.kde.KWin \
                        /Scripting org.kde.kwin.Scripting.loadScript \
                        string:" + script + " | awk 'END {print $2}'",
                           capture_output=True, shell=True).stdout.decode().split("\n")[0]

   subprocess.run("dbus-send --print-reply --dest=org.kde.KWin /" + reg_script_number + " org.kde.kwin.Script.run",
                  shell=True, stdout=subprocess.DEVNULL)
   subprocess.run("dbus-send --print-reply --dest=org.kde.KWin /" + reg_script_number + " org.kde.kwin.Script.stop",
                  shell=True, stdout=subprocess.DEVNULL)  # unregister number

   since = str(datetime_now)

   msg = subprocess.run("journalctl _COMM=kwin_wayland -o cat --since \"" + since + "\"",
                        capture_output=True, shell=True).stdout.decode().rstrip().split("\n")
   msg = [el.lstrip("js: ") for el in msg]

   return msg


print('\n'.join(get_list_of_windows()))