a python script that fake a key stroke to keep the system alive

staying_alive.py

#!/bin/env python3
import sys
from threading import Event
from keyboard import press, add_hotkey, remove_hotkey
from time import sleep
from typing import Union

PERIOD = 2.0
TOGGLING_KEY = 'alt+t'
TERMINATING_KEY = 'esc'

def terminate(flag: dict):
    flag['active'] = True
    print("Terminating gently... ", end='')

def toggle_activation(flag: dict):
    if not flag['active']:
        flag['active'] = True
        print("Activated.")
    else:
        flag['active'] = False
        print("Deactivate.")

def keep_alive(key: str):
    lock = Event()
    toggling_flag = {'active': True}
    termination_flag = {'active': False}
    try:
        add_hotkey(TOGGLING_KEY, toggle_activation, args=(toggling_flag,))
        add_hotkey(TERMINATING_KEY, terminate, args=(termination_flag,))
        while not termination_flag['active']:
            if termination_flag['active']:
                break
            if toggling_flag['active']:
                press(key)
                print(f'Pressed key: {key}')
            else:
                print('Deactivated.')
            _ = lock.wait(timeout=PERIOD)
    except Exception as e:
        print('Error on keep_alive: {}'.format(e))

def main():
    try:
        print('Running...')
        keep_alive('pause')
        print('done.')
    except KeyboardInterrupt:
        pass
    except Exception as e:
        print('Error on main: {}'.format(e))    
    print('Stopped.')
if __name__ == '__main__':
    main()