discord.py中repeat命令无法实现音乐无限循环的技术问询

Hey there! Let's break down why your repeat command isn't working as expected and fix it step by step.

Immediate Issues in Your Current Code #

First, let's tackle the small but critical problems in your existing repeat command:

1. is_playing is a method, not a property
   In your check if not voice.is_playing:, you're referencing the method object instead of calling it. This means the condition will never trigger (since the method exists even if no audio is playing). You need to call it with parentheses: voice.is_playing().

2. Missing a check for an active voice connection
   If the bot isn't connected to any voice channel in the guild, voice will be None, and trying to access voice.is_playing() will throw an error. Always verify the voice client exists first.

The Core Problem: voice.loop Doesn’t Auto-Restart Audio by Default #

Discord.py’s VoiceClient.loop property is just a flag—it doesn’t automatically make audio repeat on its own. You need to add an after callback to your play command that checks this flag and restarts the audio when it finishes playing.

Fixed Code Examples #

1. Updated repeat Command

We’ll fix the checks and make the command toggle the loop state (more user-friendly than only enabling it):

@bot.command(pass_context=True)
async def repeat(ctx):
    voice = get(bot.voice_clients, guild=ctx.guild)
    # Verify bot is connected and playing audio
    if not voice or not voice.is_playing():
        return await ctx.send('Aucune musique joué !')
    
    # Toggle loop on/off
    voice.loop = not voice.loop
    status = "activé" if voice.loop else "désactivé"
    await ctx.send(f"La répétition est {status}\nPour l'inverser, utilisez `!repeat` à nouveau")
    await ctx.message.add_reaction('✅')

2. Modified play Command to Support Looping

Your play command needs an after callback that restarts the audio if looping is enabled. Here’s how to implement it:

@bot.command()
async def play(ctx, *, url):
    # Check if user is in a voice channel
    if not ctx.author.voice:
        return await ctx.send("Tu n'es pas dans un canal vocal !")
    
    voice_channel = ctx.author.voice.channel
    voice = get(bot.voice_clients, guild=ctx.guild)
    
    # Connect or move to the user's voice channel
    if not voice:
        voice = await voice_channel.connect()
    elif voice.channel != voice_channel:
        await voice.move_to(voice_channel)
    
    # Create the audio source
    source = await discord.FFmpegOpusAudio.from_probe(url)
    
    # Callback to restart audio if loop is enabled
    def after_playing(error):
        if error:
            print(f"Erreur lors de la lecture : {error}")
        # Restart playback only if loop is on and bot is still connected
        if voice and voice.loop:
            voice.play(source, after=after_playing)
    
    # Start playing with the loop-aware callback
    voice.play(source, after=after_playing)
    await ctx.send(f"Lecture démarrée : {url}")

Why This Works #

• The after callback runs immediately after the audio finishes. It checks if voice.loop is enabled, and if so, restarts the same audio source.
• The updated repeat command safely validates the bot’s state before making changes, and gives users control to toggle looping on or off.

内容的提问来源于stack exchange，提问作者bey ptitloup