Automatically suspend using your own custom timing, unlike screen savers.

awake_or_suspend.py

"""
Automatically suspend computer when the user has fallen asleep. But using your
own custom timing.

Add to your crontab with `crontab -e`

# m h  dom mon dow   command
  0 2  *   *   *     python3 /path/to/awake_or_suspend.py

This command either needs that your user can invoke `sudo` without a password or that it's launched with sude permissions.

Source:
https://gist.github.com/benjaoming/49015c0265f80249da080c41f79ceebc
"""

import gi
import os
import threading
import time
  
gi.require_version('Gtk', '3.0')

from datetime import datetime, timedelta
from gi.repository import Gtk


def suspend(seconds):

    time.sleep(seconds)
    os.system("systemctl suspend -i")


class DialogWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="Dialog Example")
        self.hide()

        dialog = Gtk.MessageDialog(
            self,
            0,
            Gtk.MessageType.WARNING,
            Gtk.ButtonsType.CANCEL,
            "Are you awake buddy?"
        )

        seconds = 60 * 10  # 10 minutes

        when = datetime.now() + timedelta(seconds=seconds)

        dialog.format_secondary_text(
            "I'd also like some sleep! Press 'Cancel' before "
            "{:%H:%M:%S} or I'm gonna suspend myself.".format(when)
        )
        
        dialog.set_default_size(100, 100)

        t = threading.Thread(target=suspend, args=(seconds,), daemon=True)
        t.start()

        response = dialog.run()

        # if response == Gtk.ResponseType.CANCEL:
        #     print("The OK button was clicked")

        dialog.destroy()
        
        raise SystemExit
        

win = DialogWindow()
win.connect("delete-event", Gtk.main_quit)
Gtk.main()