如何在Python中终止线程？

import threading

class MyThread(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.is_running = True

    def run(self):
        while self.is_running:
            # 线程执行的任务
            pass

    def stop(self):
        self.is_running = False

# 创建线程对象
thread = MyThread()
# 启动线程
thread.start()
# 终止线程
thread.stop()

import threading

def my_task():
    while True:
        # 线程执行的任务
        pass

# 创建线程对象
thread = threading.Thread(target=my_task)
# 启动线程
thread.start()
# 终止线程
thread._stop()

import threading

def my_task():
    while True:
        # 线程执行的任务
        pass

# 创建线程对象
thread = threading.Thread(target=my_task)
# 启动线程
thread.start()
# 终止线程
thread._Thread__stop()