discord.py
==========

基本的に下記を見ながら学んだ
https://dev.classmethod.jp/articles/discord-bot-by-discordpy/

message content intent を ON にする
https://discord.com/developers/applications
参考: https://teratail.com/questions/nvls1hx0d4fr9z

import discord

intents = discord.Intents.default()
intents.message_content = True
client = discord.Client(intents=intents)

TOKEN = 'MTAyMjc5MjUzNTYxNTIzMDAwMw.GXbIUq.9eA7awIMUsMpYUJEPrhcfAmeq28kIggi1MxP8U'
GUILD_ID = '741941462287122452'
CH_ID = 741941462287122457

@client.event
async def on_ready():
    guild = await client.fetch_guild(GUILD_ID)
    print(f'We have logged in as {client.user}')

@client.event
async def on_message(message):
    if message.author == client.user:
        return

    if message.channel.id == CH_ID:
        if message.content.startswith('$hello'):
            await client.get_channel(CH_ID).send('Hello!')

client.run(TOKEN)