Discord机器人独立函数无法接收消息的问题求助

问题根源 #

你定义的spam是一个独立异步函数，但没有在on_message事件处理器中被调用。Discord.py的on_message事件只会执行自身内部逻辑，不会自动触发未关联的外部函数，所以用户发送$long时，机器人根本没机会执行spam里的判断逻辑。

修复方案 #

方案1：在on_message中调用spam函数 #

直接在on_message事件里添加对spam的调用，让机器人能处理$long指令：

import discord
import mysql.connector
client = discord.Client(intents=discord.Intents.all())
mylb = mysql.connector.connect(
    host='localhost',
    user='root',
    password="",
    database="worst")
cursor = mylb.cursor()

@client.event
async def on_ready():
    print('We have logged in as {0.user}'.format(client))

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

    if message.content.startswith('$hello'):
        await message.channel.send('Hello!')
    
    # 调用spam函数处理$long指令
    await spam(message)
   
async def spam(message):
    if message.author == client.user:
        return

    if message.content.startswith('$long'):
       await message.channel.send("spam")
    
client.run('my token')

方案2：将spam逻辑整合到on_message中 #

如果函数逻辑简单，直接把判断放到on_message里会更简洁：

import discord
import mysql.connector
client = discord.Client(intents=discord.Intents.all())
mylb = mysql.connector.connect(
    host='localhost',
    user='root',
    password="",
    database="worst")
cursor = mylb.cursor()

@client.event
async def on_ready():
    print('We have logged in as {0.user}'.format(client))

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

    if message.content.startswith('$hello'):
        await message.channel.send('Hello!')
    elif message.content.startswith('$long'):
        await message.channel.send("spam")
    
client.run('my token')

方案3：使用commands.Bot简化命令管理（推荐） #

如果后续要扩展更多命令，建议改用commands.Bot，它自带命令装饰器，代码更易维护：

import discord
from discord.ext import commands
import mysql.connector

# 初始化Bot，命令前缀设为$
bot = commands.Bot(command_prefix='$', intents=discord.Intents.all())
mylb = mysql.connector.connect(
    host='localhost',
    user='root',
    password="",
    database="worst")
cursor = mylb.cursor()

@bot.event
async def on_ready():
    print('We have logged in as {0.user}'.format(bot))

@bot.command()
async def hello(ctx):
    await ctx.send('Hello!')

@bot.command()
async def long(ctx):
    await ctx.send("spam")

bot.run('my token')

额外提醒 #

• 确认机器人Token正确，且已被邀请到目标服务器，拥有发送消息的权限
• MySQL连接如果失败可能导致机器人崩溃，建议添加异常处理逻辑

内容的提问来源于stack exchange，提问作者Mudit Dagar