Expanded demo code for Python3 logging with multiprocessing

listener.py

import logging
from logging import handlers
from time import sleep


def listener_configurer():
    root = logging.getLogger()
    file_handler = handlers.RotatingFileHandler('mptest.log', 'a', 300, 10)
    console_handler = logging.StreamHandler()
    formatter = logging.Formatter('%(asctime)s %(processName)-10s %(name)s %(levelname)-8s %(message)s')
    file_handler.setFormatter(formatter)
    console_handler.setFormatter(formatter)
    root.addHandler(file_handler)
    root.addHandler(console_handler)
    root.setLevel(logging.DEBUG)


def listener_process(queue):
    listener_configurer()
    while True:
        while not queue.empty():
            record = queue.get()
            logger = logging.getLogger(record.name)
            logger.handle(record)
        sleep(1)

main.py

import logging
from logging import handlers
import multiprocessing

from listener import listener_process
from worker import worker_process


logger = logging.getLogger(__name__)  # use module name


def root_configurer(queue):
    h = handlers.QueueHandler(queue)
    root = logging.getLogger()
    root.addHandler(h)
    root.setLevel(logging.DEBUG)


def main():
    queue = multiprocessing.Queue(-1)
    listener = multiprocessing.Process(
        target=listener_process, args=(queue,))
    listener.start()

    root_configurer(queue)

    logger.info('Logging from main')
    workers = []
    for i in range(3):
        worker = multiprocessing.Process(target=worker_process, args=(queue,))
        workers.append(worker)
        worker.start()
    for w in workers:
        w.join()
    logger.info('main function ends')


if __name__ == '__main__':
    main()

worker.py

import logging
from time import sleep
from random import random, randint


logger = logging.getLogger(__name__)  # use module name


def worker_process(queue):
    for i in range(3):
        sleep(random())
        logger.info(f'Logging a random number {randint(0, 10)}')