Python Script to make a lightweight childlock using crons/windows scheduler

childlock.py

#!/usr/bin/env python

import os
import sys
import time
import datetime

# Script to kill specific programs outside of specified times
# E.G. for child locks
# Alert only work on windows
# Use crons or windows scheduler (call every minute) to make it work effectively


def get_settings():
    return {
        'STARTTIME': datetime.time(8,00),
        'ENDTIME':datetime.time(18,00),
        'NOTIFICATION_DELAY':'10', # Time in minutes before endtime, when notification should pop up
        'NOTIFICATION_MESSAGE':'Steam is closed soon',
        'PROGRAMS_TO_KILL':{'steam.exe'}, # Add programs to kill here, e.g. {'chrome.exe', 'steam.exe', 'firefox.exe'}
    }

def in_time_range(start, end, time):
    # Check if current time is in betweend start and end
    if start <= datetime.time(time.hour, time.minute) <= end:
        return True
    else:
        return False

def show_alert(title, text, style):
    # Windows Messagebox
    try:
        import ctypes
        ctypes.windll.user32.MessageBoxA(0, text, title, style)
    except Exception:
        pass

def main(arguments):
    settings = get_settings()
    current_time = datetime.datetime.now()
    notification_time = (current_time - datetime.timedelta(minutes = int(settings['NOTIFICATION_DELAY'])))

    if in_time_range(settings['STARTTIME'], settings['ENDTIME'], current_time):
        # This is okay
        if current_time == notification_time:
            # Show notification x minutes before the endtime
            try:
                show_alert("Warning", settings['NOTIFICATION_MESSAGE'], 1)
            except Exception:
                pass
    else:
        # If time is not in range, kill the program
        while not (in_time_range(settings['STARTTIME'], settings['ENDTIME'], current_time)):
            # No way to start it during the 'no'-time
            for program in settings['PROGRAMS_TO_KILL']:
                os.system("TASKKILL /F /IM "+program)
    

if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]))