python_kill_thread.py

import time
import threading

class p:
    def __init__(self):
        self.flag = True
        self.thread = threading.Thread(target=self.show)
        self.thread.start()

    def show(self):
        while True:
            if self.flag:
                print("Hello")
            else:
                print("dead")
                break

p1 = p()
time.sleep(3)
p1.flag = False
print(p1.thread.is_alive())
p1.thread.join()
print(p1.thread.is_alive())