from khl import Bot, Message

# init Bot
bot = Bot(token='xxxxxxxxxxxxxxxxxxxxxxxxx')


# register command, send `/hello` in channel to invoke
@bot.command(name='hello')
async def world(msg: Message):
    await msg.reply('world!')


# everything done, go ahead now!
bot.run()
# now invite the bot to a server, and send '/hello' in any channel
# (remember to grant the bot with read & send permissions)