Python: MonitorOff

#!/usr/bin/env python3

# NOTE: Windows users need to install pypiwin32 for this script to work:
#       Run CMD as administrator > pip install pypiwin32

import platform
def screenOff():
    system = platform.system()
    if system == 'Linux':
        import subprocess
        import os
        if os.environ.get('XDG_SESSION_TYPE') == 'x11':
            # NOTE: To prevent passworded lockscreen from appearing for XFCE:
            #       Start > Power Manager > Security:
            #           Automatically lock the session: Never
            #           [ ] Lock screen when system is going to sleep

            # SOURCE: https://stackoverflow.com/questions/60851689/turn-screen-off-in-linux-via-python3
            # SOURCE: https://askubuntu.com/questions/38776/trigger-screensaver-off-monitor
            # SOURCE: https://ubuntuforums.org/showthread.php?t=1607724
            # SOURCE: https://wiki.archlinux.org/title/Display_Power_Management_Signaling
            subprocess.run(["xset", "dpms", "force", "suspend"])
        elif os.environ.get('XDG_SESSION_TYPE') == 'wayland':
            # NOTE: To prevent passworded lockscreen from appearing for KDE:
            #       Start > Screen Locking:
            #           Lock screen automatically: [ ] After [5 minutes]
            #                                      [ ] After waking from sleep

            # SOURCE: https://askubuntu.com/questions/1316097/how-to-turn-off-the-monitor-via-command-on-wayland-kde-plasma
            subprocess.run(["kscreen-doctor", "--dpms", "off"])
        else:
            print('Could not determine the display server.')
    elif system == 'Windows':
        # pip install pypiwin32
        import win32con
        import win32gui
        # SOURCE: https://stackoverflow.com/questions/70965202/python-turn-screen-on-and-off-on-windows
        win32gui.PostMessage(win32con.HWND_BROADCAST, win32con.WM_SYSCOMMAND, win32con.SC_MONITORPOWER, 2)
    else:
        print('Unknown OS detected:', system)

# ----

import time
def countdownMessage(message, delaySeconds):
    while delaySeconds > 0:
        print('\r', message.format(delaySeconds), end='', flush=True)
        time.sleep(1)
        delaySeconds -= 1

def main():
    # This delay is to give the mouse a chance to stop moving.
    # Mouse-wire tension + slippery feet can cause unintended mouse movement which will wake up the monitor prematurely.
    countdownMessage('Turning off monitor in {} seconds . . . ', 5)
    screenOff()
    return

if __name__ == '__main__':
    main()