python threading.Thread暂停、唤醒、退出 不消耗cpu

class MyThreadSound(threading.Thread):
    def __init__(self):
        super(MyThreadSound, self).__init__()
        self.isexit = False
        self.ispause = True
        self.pausetimeout = None  # 暂停等待最大超时60S  self.pausetimeout =None 表示无限等待
        self.stopevent = threading.Event()
    """
    暂停
    """
    def pause(self):
        self.ispause = True
    """
    退出
    """
    def exit(self):
        self.isexit = True
        self.wake()

    """
    唤醒
    """
    def wake(self):
        self.ispause = False
        self.stopevent.set()

    def run(self):
        while not self.isexit:
            """
            在此做逻辑处理
            """
            time.sleep(0.5)
            if self.ispause:
                self.stopevent.clear()
                self.stopevent.wait(self.pausetimeout)