Python / Pyside：如何在完成后彻底销毁线程对象？

Question

我的GUI上有一个启动线程的按钮。一个额外的按钮，通过向线程发送信号来阻止线程，要求它通过引发异常来自杀。但是，即使在线程死亡之后，按钮的信号似乎也连接到任何新线程对象，包括旧线程对象。因此，如果我已经启动了第5个线程，该按钮会调用该方法5次。

class Worker(QtCore.QObject):

    end = QtCore.Signal()

    def __init__(self, settings):
        super(Worker, self).__init__()

    def start_work(self):
        self.end_flag = False
        try:
            print('working')
            if(end_flag):
                raise KillThread
            print('working again')
            if(end_flag):
                raise KillThread
        except KillThread:
            print('user clicked stop')

class Gui(QtGui.QMainWindow):

    def __init__(self):
        super(Gui, self).__init__()
        self.ui = Ui_mainWindow()
        self.ui.setupUi(self)

        # button that starts a new thread
        self.ui.start_button.clicked.connect(self.start_work_thread)

    def start_work_thread(self):
        self.new_thread = QtCore.Qthread()
        self.worker = Worker()
        self.new_thread.started.connect(self.worker.start_work)
        self.new_thread.finished.connect(self.new_thread.quit)

        # connects the stop button
        self.stop_button.clicked.connect(self.kill_thread)

        # moves worker to a thread
        self.worker.moveToThread(self.new_thread)
        self.new_thread.start()

    # invoked when stop button is clicked
    def kill_thread(self):
        print('killing thread')
        self.new_thread.end_flag = True



if __name__ == '__main__':
    try:
        app = QtGui.QApplication(sys.argv)
        main = Gui()
        main.show()
        sys.exit(app.exec_())
    finally:
        pass
        #save settings