Python3 如何结束子线程？

import threading
import time
import inspect
import ctypes
 
 
def _async_raise(tid, exctype):
    """raises the exception, performs cleanup if needed"""
    tid = ctypes.c_long(tid)
    if not inspect.isclass(exctype):
        exctype = type(exctype)
    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
    if res == 0:
        raise ValueError("invalid thread id")
    elif res != 1:
        # """if it returns a number greater than one, you're in trouble,
        # and you should call it again with exc=NULL to revert the effect"""
        ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
        raise SystemError("PyThreadState_SetAsyncExc failed")
 
 
def stop_thread(thread):
    _async_raise(thread.ident, SystemExit)
 
 
def test():
    while True:
        print('-------')
        time.sleep(0.5)
 
 
if __name__ == "__main__":
    t = threading.Thread(target=test)
    t.start()
    print(t.isAlive())
    time.sleep(5.2)
    t.join()
    time.sleep(3)
    print("main thread sleep finish")
    print(t.isAlive())

 更优雅的办法：

import threading
import time
 
threadState = {}

class myThread(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
    def run(self):
        print ("开始线程：")
        threadState[self.ident] = True
        test(self.ident)
        print ("退出线程：")
    def stop(self):
        threadState[self.ident] = False
        while self.isAlive():
            time.sleep(0.001)
        return 'stopped'
    def restart(self):
        if self.stop() == 'stopped' :
            self.run()

def test(tid):
    a = 0
    while True and threadState[tid]:
        a += 1
        print('-' * 10 + str(a) + '-' * 10)
        time.sleep(0.5)

if __name__ == "__main__":
    t = myThread()
    t.start()
    print(t.ident)
    time.sleep(5.2)
    t.restart()