请问在 Python 的事件系统中，如何可以通过事件通知立刻终结一个正在运行的子线程？

大家好，最近在完善手头上一个基于事件系统的 GUI 。

现在遇到一个问题，就是当我在执行一个按钮点击事件的时候，实际会开一个子线程进行业务逻辑的处理，这个处理过程可能会比较长，并且中间可能会出现一些不符合预期的情况发生，当发生这种情况时，我希望会借由发送一个错误的事件通知 EventManager，然后调用 listener 的方法来立刻终结这个对应的错误线程（因为之前已经发生了错误了，后续逻辑代码继续执行没有意义了）

代码如下，大佬们直接复制运行即可观察。如能解答，万分感谢！

from queue import Queue, Empty
from threading import *
from tkinter import *
import time
from tkinter import ttk

EVENT_TYPE_1 = "Count"
EVENT_TYPE_2 = "Error"
MAX_NUMBER = 10
CUR_NUMBER = 0


class event_manager:
    def __init__(self):
        self._eventQueue = Queue()
        self._thread = Thread(target=self.Run, daemon=True)
        self._handlers = {}
        self._active = False

    def Start(self):
        self._active = True
        self._thread.start()

    def Run(self):
        while self._active is True:
            try:
                event = self._eventQueue.get(block=True, timeout=1)
                self.Process(event)
            except Empty:
                pass

    def Process(self, event):
        if event.type in self._handlers:
            for handler in self._handlers[event.type]:
                handler()
        else:
            pass

    def Stop(self):
        self._active = False
        self._thread.join()

    def addEventListenter(self, type_, handler):
        try:
            handlerList = self._handlers[type_]

        except KeyError:
            handlerList = []
            self._handlers[type_] = handlerList

        if handler not in handlerList:
            handlerList.append(handler)

    def removeEventListenter(self, type_, handler):
        try:
            handlerList = self._handlers[type_]
            if handler in handlerList:
                handlerList.remove(handler)
            if not handlerList:
                del self._handlers[type_]
        except KeyError:
            pass

    def sendEvent(self, event):
        self._eventQueue.put(event)


class Event:
    def __init__(self, event_event_name, cur_done_task, type_=None):
        self.type = type_
        self._event_name = event_event_name
        self._curDoneTask = cur_done_task


class EventSource:
    def __init__(self, event_name, event_mgr, max_number, type):
        self._event_name = event_name
        self._event_manager = event_mgr
        self._type = type
        self._max_number = max_number

    def count(self):
        global CUR_NUMBER
        for i in range(self._max_number):
            CUR_NUMBER = i + 1

            if CUR_NUMBER == 4:  # 在业务逻辑线程中增加检测环节，如果发生错误就会发送错误事件，希望可以立刻终结当前的线程，不执行后续的代码
                print("************ detect error occurred , this thread should be terminated immediately !")
                errorEvent = Event("error", CUR_NUMBER, type_=EVENT_TYPE_2)
                self._event_manager.sendEvent(errorEvent)

            print(
                "************ main thread start：now start process {} - count : {}".format(self._event_name, CUR_NUMBER))
            event = Event("test", CUR_NUMBER, type_=self._type)
            self._event_manager.sendEvent(event)
            time.sleep(1)


class GUIListener(Tk):
    def __init__(self):
        super(GUIListener, self).__init__()

        self.title("Progress GUI")
        self.geometry("1200x805+600+100")
        self.config(bg="#535353")
        self.resizable(True, True)
        self.taskThread = None

        self.progressBar = ttk.Progressbar(master=self, orient=HORIZONTAL, maximum=MAX_NUMBER, length=300)
        self.progressBar.pack()
        self.button = ttk.Button(self, text="Run", command=lambda: self.button_function(MAX_NUMBER))
        self.button.pack()

    def update_progress_value(self):
        print("************Sub thread start: detect progress bar value is now...{}".format(self.progressBar['value']))
        self.progressBar['value'] = CUR_NUMBER
        self.progressBar.update_idletasks()
        print("************Sub thread start: update progress bar value to...{}".format(CUR_NUMBER))

    def button_function(self, max_number):
        # 在正式开始执行逻辑子线程之前，确实可以提前做一些判断，来决定是否满足条件，开始接下来的逻辑子线程，但是这个不在本次讨论范围内
        es = EventSource("eventSource", eventMgr, max_number, EVENT_TYPE_1)
        self.taskThread = Thread(target=es.count, daemon=True).start()  # 这里开始执行实际的业务逻辑子线程

    def terminate_error_thread(self):  # 这个方法在 GUIListener 接受到事件源发出的错误逻辑时被唤起，用来立刻终结正在执行事件源的线程，不做后续无用的代码逻辑处理
        pass
        # TODO: but how to implement this method ？


if __name__ == '__main__':
    gui = GUIListener()

    eventMgr = event_manager()
    eventMgr.addEventListenter(EVENT_TYPE_1, gui.update_progress_value)
    eventMgr.addEventListenter(EVENT_TYPE_2, gui.terminate_error_thread)

    eventMgr.Start()

    gui.mainloop()

顺便一提，希望得到的结果是这样的

************ main thread start：now start process eventSource - count : 1
************Sub thread start: detect progress bar value is now...0.0
************Sub thread start: update progress bar value to...1
************ main thread start：now start process eventSource - count : 2
************Sub thread start: detect progress bar value is now...1
************Sub thread start: update progress bar value to...2
************ main thread start：now start process eventSource - count : 3
************Sub thread start: detect progress bar value is now...2
************Sub thread start: update progress bar value to...3
************ detect error occurred , this thread should be terminated immediately !

到这里就应该自然停止。