How to use the tartube.downloads.PipeReader function in tartube

#   operation
        self.download_manager_obj = download_manager_obj
        # The parent downloads.DownloadWorker object
        self.download_worker_obj = download_worker_obj
        # The downloads.DownloadItem object describing the URL from which
        #   youtube-dl should download video(s)
        self.download_item_obj = download_item_obj

        # This object reads from the child process STDOUT and STDERR in an
        #   asynchronous way
        # Standard Python synchronised queue classes
        self.stdout_queue = queue.Queue()
        self.stderr_queue = queue.Queue()
        # The downloads.PipeReader objects created to handle reading from the
        #   pipes
        self.stdout_reader = PipeReader(self.stdout_queue)
        self.stderr_reader = PipeReader(self.stderr_queue)

        # The child process created by self.create_child_process()
        self.child_process = None


        # IV list - other
        # ---------------
        # The current return code, using values in the range 0-5, as described
        #   above
        # The value remains set to self.OK unless we encounter any problems
        # The larger the number, the higher in the hierarchy of return codes.
        #   Codes lower in the hierarchy (with a smaller number) cannot
        #   overwrite higher in the hierarchy (with a bigger number)
        self.return_code = self.OK
        # The time (in seconds) between iterations of the loop in

"""Called by downloads.VideoDownloader.close(), which is the destructor
        function for that object.

        Join the thread and update IVs.

        Args:

            timeout (-): No calling code sets a timeout

        """

        if DEBUG_FUNC_FLAG:
            utils.debug_time('dld 3621 join')

        self.running_flag = False
        super(PipeReader, self).join(timeout)

self.download_manager_obj = download_manager_obj
        # The parent downloads.DownloadWorker object
        self.download_worker_obj = download_worker_obj
        # The downloads.DownloadItem object describing the URL from which
        #   youtube-dl should download video(s)
        self.download_item_obj = download_item_obj

        # This object reads from the child process STDOUT and STDERR in an
        #   asynchronous way
        # Standard Python synchronised queue classes
        self.stdout_queue = queue.Queue()
        self.stderr_queue = queue.Queue()
        # The downloads.PipeReader objects created to handle reading from the
        #   pipes
        self.stdout_reader = PipeReader(self.stdout_queue)
        self.stderr_reader = PipeReader(self.stderr_queue)

        # The child process created by self.create_child_process()
        self.child_process = None


        # IV list - other
        # ---------------
        # The current return code, using values in the range 0-5, as described
        #   above
        # The value remains set to self.OK unless we encounter any problems
        # The larger the number, the higher in the hierarchy of return codes.
        #   Codes lower in the hierarchy (with a smaller number) cannot
        #   overwrite higher in the hierarchy (with a bigger number)
        self.return_code = self.OK
        # The time (in seconds) between iterations of the loop in
        #   self.do_download()