python怎么关闭线程

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 print_time():

    while 2:

         print(111111111111)

         print(222222222222)

         print(333333333333)

         print(444444444444)

         print(555555555555)

         print(666666666666)

if __name__ == "__main__":

    t = threading.Thread(target=print_time)

    t.start()

    stop_thread(t)

    print("stoped")

    while 1:

        pass