#!/usr/bin/env python3

# The `enumerate()` method returns a list of active `threading.Thread()`

# instances.

# This list will include the current thread, and all other threads.

# NOTE: (From PyMOTW3)

# The current thread should not be joined with `join()`, since

# it will introduce a deadlock with other threads.

import threading

import time

import logging

logging.basicConfig(level=logging.DEBUG, format="(%(threadName)-1s %(message)s")

def my_worker():

logging.debug("`my_worker` thread started")

time.sleep(5)

logging.debug("`my_worker` thread sleeping for 5 seconds")

logging.debug("`my_worker` thread ending")

for i in range(5):

thread = threading.Thread(target=my_worker, daemon=True)

thread.start()

main_thread = threading.main_thread()

for t in threading.enumerate():

if t is main_thread:

continue

logging.debug("Joining %s", t.getName())

t.join()