Python background threading and threadpool executor example

processing.py

import threading
from concurrent.futures import ThreadPoolExecutor
from time import sleep

class ProcessingBackgroundThread:

    def __init__(self):
        thread = threading.Thread(target=self.process)
        thread.daemon = True
        thread.start()

    def process(self):
        print("Doing work")



class ProcessingThreadPool():

    def __init__(self):
        with ThreadPoolExecutor(max_workers=2) as executor:
            future = executor.submit(self.return_after_2_secs, ("hello"))
            print(future.done())
            sleep(5)
            print(future.done())
            print(future.result())


    def return_after_2_secs(self, message):
        sleep(2)
        return message


ProcessingBackgroundThread()
ProcessingThreadPool()