CODEWITHSUNDEEP
pythonmultithreadingdaemon
bulkmoustache
bulkmoustache

Reputation: 2025

Exit daemon thread

How do I close/exit a thread or daemon thread? I have something like this in my application:

th = ThreadClass(param)
th.daemon = True

if option == 'yes':
    th.start()
elif option == 'no':
    # Close the daemon thread

How do I exit the application?

Upvotes: 1

Views: 570

Answers (1)

johntellsall
johntellsall

Reputation: 15180

Exit the application by having a "die now" flag. When the parent (or anyone) sets the flag, then all threads watching it will exit.

Example:

import time
from threading import *

class WorkerThread(Thread):
    def __init__(self, die_flag, *args, **kw):
        super(WorkerThread,self).__init__(*args, **kw)
        self.die_flag = die_flag

    def run(self):
        for num in range(3):
            if self.die_flag.is_set():
                print "{}: bye".format(
                    current_thread().name
                    )
                return
            print "{}: num={}".format(
                current_thread().name, num,
                )
            time.sleep(1)

flag = Event()

WorkerThread(name='whiskey', die_flag=flag).start()
time.sleep(2)

print '\nTELL WORKERS TO DIE'
flag.set()

print '\nWAITING FOR WORKERS'
for thread in enumerate():
    if thread != current_thread():
        print thread.name,
        thread.join()
    print

Upvotes: 1

Related Questions