python 強制停止線程

# coding=utf-8
import threading
import time


class CountdownTask:
    def __init__(self):
        self._running = True

    def terminate(self):
        self._running = False

    def run(self, n):
        while self._running:
            # 將要執行的任務放在此處
            # 示例
            print("T-minus  {}\n".format(n))
            n -= 1
            time.sleep(100)
            # end


# 示例
# stop threading
countdownTask = CountdownTask()
th = threading.Thread(target=countdownTask.run, args=(10,))  # args可以給run傳參
th.start()
countdownTask.terminate()  # Signal termination
# end