How to end with a thread from the main thread?

Question

I'm looking for this question online but I can not find any way to do it directly I'm trying the following

class Test(Thread):
    def __init__(self):
        Thread.__init__(self)

    def run(self):
        for i in range(3):
            time.sleep(1)
            print(i)


def main():
    test = Test()
    test.start()
    del test
    time.sleep(5)
    print('end')

main()

the only way to stop the thread is from the run method when the code ends but I can not find any way to end the thread.

Possible duplicate of [Is there any way to kill a Thread in Python?](https://stackoverflow.com/questions/323972/is-there-any-way-to-kill-a-thread-in-python) — MoxieBall, Jun 26 '18 at 20:42

score 1 · Accepted Answer · answered Jun 26 '18 at 21:23

1

You can't. All you can do is ask it nicely (by implementing some sort of inter thread communication like a threading.Queue object, then making your thread check it for instructions) and hope for the best.

answered Jun 26 '18 at 21:23

nosklo

217,122
57
293
297

Artsiom Praneuski · Answer 2 · 2018-11-02T15:15:45.837

You can use this simple approach to stop/kill/end a child thread from the parent thread using some variable that is being checked in child thread periodically:

from threading import Thread
from time import time, sleep


class Test:
    some_var = True

    def __init__(self):
        self.t = Thread(target=self.worker)
        #self.t.setDaemon(True)
        self.t.start()

    def worker(self):
        while self.some_var is True:
            print("%s > I'm running" % str(time()))


test = Test()
sleep(2)
test.some_var = False
print("End!")

Let me know if I didn't understand your question, but I think I've answered your question "How to end with a thread from the main thread?".

How to end with a thread from the main thread?

2 Answers2