TypeError: source must an AudioSource not NoneType

[mrracoonman]

I'm attempting to get a bot to play audio in a voice channel, this is the code I have for it.

@bot.command(pass_context=True)
async def play(ctx, url: str):
song_there = os.path.isfile('song.mp3')
try:
if song_there:
os.remove('song.mp3')
print('Removed old song file.')
except PermissionError:
print('Trying to delete song file, but is being played.')
await ctx.send(f'ERROR, Music playing')
return

await ctx.send(f'Getting everything ready now')

voice = ctx.guild.voice_client
ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        "preferredcodec": 'mp3',

    }],
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    print(f'Downloading audio now')
    ydl.download([url])

for file in os.listdir('./'):
    if file.endswith('.mp3'):
        name = file
        print(f'Renamed file: {file}')
        os.rename(file, 'song.mp3')

voice.play(discord.ffmpegPCMaudio('song.mp3'), after=lambda e: print(f'{name} has finished playing'))
voice.source = discord.PCMVolumeTransformer(voice.source)
voice.source.volume = 0.2

nname = name.rsplit('-', 2)
await ctx.send(f'Playing {nname}')
print(f'Playing')

And it works until about somewhere in here:

for file in os.listdir('./'):
if file.endswith('.mp3'):
name = file
print(f'Renamed file: {file}')
os.rename(file, 'song.mp3')

voice.play(discord.ffmpegPCMaudio('song.mp3'), after=lambda e: print(f'{name} has finished playing'))
voice.source = discord.PCMVolumeTransformer(voice.source)
voice.source.volume = 0.2

Then it sends this error.

Ignoring exception in command play:
Traceback (most recent call last):
File "C:\Users\User\PycharmProjects\pythonProject\venv\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
ret = await coro(*args, **kwargs)
File "C:/Users/User/PycharmProjects/pythonProject/main.py", line 136, in play
voice.play(discord.ffmpegPCMaudio('song.mp3'), after=lambda e: print(f'{name} has finished playing'))
File "C:\Users\User\PycharmProjects\pythonProject\venv\lib\site-packages\discord\voice_client.py", line 558, in play
raise TypeError('source must an AudioSource not {0.class.name}'.format(source))
TypeError: source must an AudioSource not NoneType

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\User\PycharmProjects\pythonProject\venv\lib\site-packages\discord\ext\commands\bot.py", line 903, in invoke
await ctx.command.invoke(ctx)
File "C:\Users\User\PycharmProjects\pythonProject\venv\lib\site-packages\discord\ext\commands\core.py", line 859, in invoke
await injected(*ctx.args, **ctx.kwargs)
File "C:\Users\User\PycharmProjects\pythonProject\venv\lib\site-packages\discord\ext\commands\core.py", line 94, in wrapped
raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: TypeError: source must an AudioSource not NoneType

I cant figure out why it's displaying said error

Win 10, py 3.8.6

[Harmon758]

Your traceback would seem to indicate that you're passing None to voice.play, but attempting to access discord.ffmpegPCMaudio itself should error, as the class is FFmpegPCMAudio.

For code block usage, see https://docs.github.com/en/free-pro-team@latest/github/writing-on-github/creating-and-highlighting-code-blocks.