Python 为什么终端给我这个错误，所有的模块都被导入了？

我是discord.py的新手，我想创建一个youtube下载程序代码，但这不起作用 这是我的密码：

@bot.event
async def on_message(message):
    if message.author == bot.user:
        return
    if message.content.startswith('-a'):
        msg = message.content        
        print(f'Mesagge content: {msg} \n')
        url = re.findall(r'(?:(?:https?|ftp):\/\/)?[\w/\-?=%.]+\.[\w/\-?=%.]+', msg)
        print(url)
        if url:
            if (len(url) == 1):
                validated_yt_url_1 = 'https://www.youtube.com/watch?v='
                validated_yt_url_2 = 'https://youtu.be/'
                if(validated_yt_url_1 in url[0] or validated_yt_url_2 in url[0]):
                    print('Youtube link is valid...')
                    mp3.song(url)
                    os.listdir()
                    for files in glob.glob('*.mp3'):
                        file_size = getsize(files)
                        file_size = int(file_size)
                        if file_size > 8000000:
                            print('The file size is over 8MB...\n')

                            embedVar = discord.Embed(title="Something went wrong :confused:\n\nTry sending a song that is under 7 minutes long, \nbecause of Discord's file size limit.\\Check out -help and -info commands.", color=0x0066ff)
                            await message.channel.send(embed=embedVar)
                            os.remove(files)
                            print('File was removed')
                        else:                
                            await message.channel.send(file=discord.File(files))
                            print('File was sent...\n')
                            os.remove(files)
                            print('File was deleted...\n')  
                else:
                    await message.channel.send(embed=embedVar)
                    print('The link was not valid')
            else: 
                embedVar = discord.Embed(title="Something went wrong :confused: \n\nIt looks like you sent more than one url's, please send one url at time.\n\nCheck out -help and -info commands.", color=0x0066ff)
                await message.channel.send(embed=embedVar)

错误是：

Mesagge content: -a https://www.youtube.com/watch?v=-LkmFwYvyd8 
['https://www.youtube.com/watch?v=-LkmFwYvyd8']
Youtube link is valid...
Ignoring exception in on_message
Traceback (most recent call last):
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py", line 343, in _run_event
    await coro(*args, **kwargs)
  File "main.py", line 656, in on_message
    mp3.song(url)
AttributeError: module 'mp3' has no attribute 'song'

---

如果有人帮助我，我将对此表示赞赏，还应注意，我还有其他事件，如on_message_edit

，如错误消息所述，模块

mp3

已导入，但不包含名为

song

的函数。我假设它来自您安装的软件包。它不包含歌曲，您需要阅读该模块的文档以了解如何正确使用它，或者您有自己的名为mp3.py的文件正在导入，而不是您期望的模块