Python中线程终止与挂起的实现方法

from threading import Thread,Lock
class StoppableThread(Thread):
 def __init__(self):
 Thread.__init__(self)
 self._terminate=False
 self._suspend_lock=Lock()

 def terminate(self):
 self._terminate=True

 def suspend(self):
 self._suspend_lock.acquire()

 def resume(self):
 self._suspend_lock.release()

 def run(self):
 while True:
 if self._terminate:
 break
 self._suspend_lock.acquire()
 self._suspend_lock.release()
 ...