尝试使用discord.py制作Discord机器人，但出现错误 [英] Trying to make a Discord bot with discord.py, getting errors

问题描述

我正在尝试让机器人每隔几秒钟从一组预定义的消息中发送一条消息.

I'm trying to get the bot to send a message every few seconds from a set of predefined messages.

import discord
import asyncio
import random

client = discord.Client()

async def background_loop():
    await client.wait_until_ready()
    while not client.is_closed:
        channel = client.get_channel("channel id here")
        messages = ["Hello!", "How are you doing?", "Howdy!"]
        await client.send_message(channel, random.choice(messages))
        await asyncio.sleep(120)

client.loop.create_task(background_loop())
client.run("discord token here")

但是当我尝试运行它时，我在控制台中收到此错误，并且没有消息发送到聊天室中.

But when i try too run it, i get this error in the console and no messages are sent into the chat.

/usr/bin/python3.5 /root/PycharmProjects/untitled/Loop.py
Task exception was never retrieved
future: <Task finished coro=<background_loop() done, defined at /root/PycharmProjects/untitled/Loop.py:8> exception=InvalidArgument('Destination must be Channel, PrivateChannel, User, or Object. Received NoneType',)>
Traceback (most recent call last):
  File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/root/PycharmProjects/untitled/Loop.py", line 13, in background_loop
    await client.send_message(channel, random.choice(messages))
  File "/usr/local/lib/python3.5/dist-packages/discord/client.py", line 1145, in send_message
    channel_id, guild_id = yield from self._resolve_destination(destination)
  File "/usr/local/lib/python3.5/dist-packages/discord/client.py", line 289, in _resolve_destination
    raise InvalidArgument(fmt.format(destination))
discord.errors.InvalidArgument: Destination must be Channel, PrivateChannel, User, or Object. Received NoneType

推荐答案

我通过编写帮助程序函数从客户端获取Channel对象的方法解决了此问题

I fixed this by writing a helper function to get the Channel object from the client

def get_channel(channels, channel_name):
    for channel in client.get_all_channels():
        print(channel)
        if channel.name == channel_name:
            return channel
    return None

client = discord.Client()
general_channel = get_channel(client.get_all_channels(), 'general')
await client.send_message(general_channel, 'test msg')

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