pyQt5Test

import sys, os, subprocess
from PyQt5 import QtCore
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton
from Xlib import display, X, Xatom, Xutil
import Xlib.protocol.event

atoms = {
    'type_desktop' : '_NET_WM_WINDOW_TYPE_DESKTOP',
    'type_dock'    : '_NET_WM_WINDOW_TYPE_DOCK',
    'win_type'     : '_NET_WM_WINDOW_TYPE',
    'state_below'  : '_NET_WM_STATE_BELOW',
    'wm_state'     : '_NET_WM_STATE',
    'wm_check'     : '_NET_SUPPORTING_WM_CHECK',
    'wm_name'      : '_NET_WM_NAME'
}

class AppMainWindow(QMainWindow):
    def __init__(self):
        super(AppMainWindow, self).__init__()
        self.display = display.Display()
        self.screen  = self.display.screen()
        self.root    = self.screen.root

        self.isWM = self.wmName() not in ['marco',            #Mate
                                          'kwin',             #KDE
                                          'xfwm4',            #Xfce
                                          'metacity',         #Gnome2
                                          'mutter',           #GnomeShell
                                          'compiz',           #Compiz
                                          'mutter (muffin)']  #Cinnamon
        self.win = self.display.create_resource_object("window", int(self.winId()))
        self.setProp()

    def setProp(self):
        winType = self.atom('type_desktop') if self.isWM else self.atom('type_dock')
        self.win.change_property(self.atom('win_type'), Xatom.ATOM, 32, [winType])
        self.display.flush()

    def setBelow(self):
        if self.isWM:
            return 0
        data = [1, self.atom('state_below')]
        self.sendEvent(self.win, self.atom('wm_state'), data)
        self.display.flush()

    def sendEvent(self, win, ctype, data, mask=None):
        data = (data+[0]*(5-len(data)))[:5]
        ev = Xlib.protocol.event.ClientMessage(window=win, client_type=ctype, data=(32,(data)))
        if not mask:
            mask = (X.SubstructureRedirectMask | X.SubstructureNotifyMask)
        self.root.send_event(ev, event_mask=mask)

    def atom(self, name):
        return self.display.intern_atom(atoms.get(name, name))

    def wmName(self):
        name = ''
        win_id = self.root.get_full_property(self.atom('wm_check'), 0)
        if win_id:
            w = self.display.create_resource_object("window", win_id.value[0])
            prop = w.get_full_property(self.atom('wm_name'), 0)
            if prop:
                name = prop.value
        return name.lower()

    def setClassName(self, name, className):
        self.win.set_wm_class(name, className)

def main():
    window = AppMainWindow()
    window.setClassName('qt5Test.py', 'qt5Test')

    Button = QPushButton('Close', window)
    Button.clicked.connect(QtCore.QCoreApplication.instance().quit)
    Button.move(50, 50)

    window.setGeometry(150, 150, 200, 200)

    window.show()
    window.setBelow()

    sys.exit(app.exec_())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    main()