python 强制结束线程

总结一下网上关于结束线程的方法

1.通过threading.Thread._Thread__stop()结束线程

import time
import threading
def f():
    while 1:
        time.sleep(0.1)
        print(1)


t = threading.Thread(target=f)
t.start()
time.sleep(0.5)
print("Stopping the thread")
threading.Thread._Thread__stop(t)
print("Stopped the thread")

这个方法目前用python2能成功结束线程，用python3会报错。一下是分别用python2和python3运行的结果：

python2：

1
1
1
1
Stopping the thread
Stopped the thread

python3：

1
1
1
1
Traceback (most recent call last):
  File "C:/work/1/reco/12月/tmp.py", line 64, in 
    threading.Thread._Thread__stop(t)
AttributeError: type object 'Thread' has no attribute '_Thread__stop'
Stopping the thread

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(e):
    while 2:
        print(e)




if __name__ == "__main__":
    t = threading.Thread(target=print_time,args=("2"))
    t.start()
    time.sleep(0.001)
    stop_thread(t)
    print("stoped")
    time.sleep(2)
    t1 = threading.Thread(target=print_time,args=("1"))
    t1.start()
    time.sleep(0.001)
    stop_thread(t1)
    print("stoped")
    while 1:
        pass

python2和python3都能有效结束线程。