Running a background thread in Python

threading_example.py

import threading
import time


class ThreadingExample(object):
    """ Threading example class

    The run() method will be started and it will run in the background
    until the application exits.
    """

    def __init__(self, interval=1):
        """ Constructor

        :type interval: int
        :param interval: Check interval, in seconds
        """
        self.interval = interval

        thread = threading.Thread(target=self.run, args=())
        thread.daemon = True                            # Daemonize thread
        thread.start()                                  # Start the execution

    def run(self):
        """ Method that runs forever """
        while True:
            # Do something
            print('Doing something imporant in the background')

            time.sleep(self.interval)

example = ThreadingExample()
time.sleep(3)
print('Checkpoint')
time.sleep(2)
print('Bye')

Thank you, it helps me to understand much better threading.

If I run it from command Prompt and trying to write it to file in run method in while loop. If its daemon thread it is not entering loop

thanks

Thanks again, clear code, very helpful for me.