How to use the huey.contrib.sqlitedb.Task function in huey

def enqueued_items(self, limit=None):
        query = self.tasks(Task.data).tuples()
        if limit is not None:
            query = query.limit(limit)
        return [item[0] for item in query]

def dequeue(self):
        try:
            task = (self
                    .tasks()
                    .order_by(Task.id)
                    .limit(1)
                    .get())
        except Task.DoesNotExist:
            return
        res = self.delete().where(Task.id == task.id).execute()
        if res == 1:
            return task.data

def dequeue(self):
        try:
            task = (self
                    .tasks()
                    .order_by(Task.id)
                    .limit(1)
                    .get())
        except Task.DoesNotExist:
            return
        res = self.delete().where(Task.id == task.id).execute()
        if res == 1:
            return task.data

def initialize_task_table(self):
        self.database.bind([Task, Schedule, KeyValue])

        with self.database:
            self.database.create_tables([Task, Schedule, KeyValue])

def tasks(self, *columns):
        return Task.select(*columns).where(Task.queue == self.name)

def delete(self):
        return Task.delete().where(Task.queue == self.name)

def enqueue(self, data):
        Task.create(queue=self.name, data=data)