为什么 @tasks.loop 不像我想的那样工作？ （不和谐.py）

Question

Hey guys I'm trying to write a dc bot:3

I want to set a background task with cog, and it'll send some message every 5 seconds. My Cog_Extension will initialize by self.bot = bot .

My questions are as following:

1. Why the commented part doesn't work?

discord.ext.commands.errors.ExtensionFailed: Extension 'cmds.task' raised an error: AttributeError: loop attribute cannot be accessed in non-async contexts. Consider using either an asynchronous main function and passing it to asyncio.run or using asynchronous initialisation hooks such as Client.setup_hook

2. Why await self.bot.wait_until_ready() has to put in @tasks.loop ? If I don't put it there, the variable channel will be None.

Here is my code

class Task(Cog_Extension):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.channel_id = xxx
        self.livingloop.start()

    @tasks.loop(seconds = 5)
    async def livingloop(self):
        await self.bot.wait_until_ready()
        channel = self.bot.get_channel(self.channel_id)
        print(channel)
        await channel.send("blabla")

        # async def interval():
        #     await self.bot.wait_until_ready()
        #     self.channel = self.bot.get_channel(xxx)
        #     while not self.bot.is_closed():
        #         await self.channel.send("blabla")
        #         await asyncio.sleep(5)

        # self.bg_task = self.bot.loop.create_task(interval())

Answer 1

It appears you need to make your __init__() function async.

class Task(Cog_Extension):
    async def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.channel_id = xxx
        self.livingloop.start()