a way to stop a long running thread before creating a new one

thread_test.py

import threading
from time import sleep

tn = 0

def func(id):
    tid = tn
    for i in range(10):
        if tn != tid:
            break
        print('id:', id, '/ threads:', len(threading.enumerate()), '/ timer:', i)
        sleep(1)

tn += 1
t1 = threading.Thread(target=func, args=('A'))
t1.daemon = True
t1.start()
sleep(3)
tn += 1
t2 = threading.Thread(target=func, args=('B'))
t2.daemon = True
t2.start()


while len(threading.enumerate()) > 1:
    pass

note: obviously the first thread can stop slightly after the second one has been created, that's why the output displays 3 threads (main + A + B) at some point