Continuously pulls directories from the Queue until it is empty.
        Gets child directories from parent and adds them to Queue.
        Executes task_done() to remove directory from unsearched Queue
        :param task_num: Processor ID

def parallel_worker(self, task_num):
        """
        Continuously pulls directories from the Queue until it is empty.
        Gets child directories from parent and adds them to Queue.
        Executes task_done() to remove directory from unsearched Queue
        :param task_num: Processor ID
        """
        while True:
            base, path = self.unsearched.get()
            dirs = self.explore_path(task_num, (base, path))
            for newdir in dirs:
                self.unsearched.put(newdir)
            self.unsearched.task_done()