def receive_finished(self):
if not self.isopen:<EOL><INDENT>logger = logging.getLogger(__name__)<EOL>logger.warning('<STR_LIT>')<EOL>return<EOL><DEDENT>return self.dropbox.poll()<EOL>
return a list of pairs of IDs and results of finished tasks.

        This method doesn't wait for tasks to finish. It returns IDs
        and results which have already finished.

        Returns
        -------
        list
            A list of pairs of IDs and results