python怎么关闭线程

python关闭线程的方法：

1、利用setDaemon(True)这个函数的特性关闭线程

特性如下：主线程A中，创建了子线程B，并且在主线程A中调用了B.setDaemon(),这个的意思是，把主线程A设置为守护线程，这时候，要是主线程A执行结束了，就不管子线程B是否完成,一并和主线程A退出。

2、使用ctypes强行杀掉线程

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

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