This doesn't work

sleepwake-threaded.py

#!/usr/bin/env python3

import threading
# from multiprocessing import Pool
# from multiprocessing import Process


class EventLoopThread(threading.Thread):
    def __init__(self):
        super(EventLoopThread, self).__init__()
        self.setDaemon(True)
        self.should_stop = False

    def run(self):
        from AppKit import (
            # NSDate,
            NSLog,
            NSObject,
            # NSRunLoop,
            NSWorkspace,
            NSWorkspaceDidWakeNotification,
            NSWorkspaceWillSleepNotification,
        )
        # from PyObjCTools import AppHelper
        from CoreFoundation import (
            CFRunLoopGetCurrent,
            CFRunLoopRun,
            CFRunLoopStop,
        )

        class SleepWakeNotificationHandler(NSObject):
            def receiveSleepNotification_(self, notification):
                NSLog('receiveSleepNotification: %@', notification)

            def receiveWakeNotification_(self, notification):
                NSLog('receiveWakeNotification: %@', notification)

        NSLog('Adding observers')
        workspace           = NSWorkspace.sharedWorkspace()
        notificationCenter  = workspace.notificationCenter()
        notificationHandler = SleepWakeNotificationHandler.new()
        notificationCenter.addObserver_selector_name_object_(
            notificationHandler,
            'receiveSleepNotification:',
            NSWorkspaceWillSleepNotification,
            None
        )
        notificationCenter.addObserver_selector_name_object_(
            notificationHandler,
            'receiveWakeNotification:',
            NSWorkspaceDidWakeNotification,
            None
        )

        NSLog('Starting event loop')
        # NSRunLoop.currentRunLoop().runUntilDate_(NSDate.distantFuture())
        CFRunLoopRun()
        # AppHelper.runConsoleEventLoop()

    def stop(self):
        NSLog('Stopping the event loop')
        CFRunLoopStop(CFRunLoopGetCurrent())


event_loop_thread = EventLoopThread()
event_loop_thread.start()
event_loop_thread.join()