I have the following code:

class RepeatTimer(Timer):
    """
    Extending the threading.Timer class to execute functions at fixed intervals.
    """
    def run(self):
        while not self.finished.wait(self.interval):
            self.function(*self.args, **self.kwargs)

def parallel_process(mp, arguments, cb_fn):
    main_process = multiprocessing.Process(target=mp, args=[arguments, cb_fn])
    side_process = RepeatTimer(30, generate_info)
    final_process = multiprocessing.Process(target=create_final)
    main_process.start()
    side_process.start()
    main_process.join()
    side_process.cancel()
    final_process.start()
    final_process.join()

mp, generate_info, and create_final are my functions being used. I wish to execute mp and generate_info concurrently and then execute create_final after their completion.

mp and generate_info run concurrently if I don’t use the create_final function, but after I use the function, it also starts running while the other two are running. I read about it and got to know join() method will only block the main process, and not other multiprocessing functions.

What can I do to get my desired output? Even using concurrent.futures also throws the same error.