main.py

import discord
from discord.ext import commands
import os
import youtube_dl

client = commands.Bot(command_prefix = "!")

@client.command()
async def play(ctx, url : str):
    song_there = os.path.isfile("song.mp3")
    try:
        if song_there:
            os.remove("song.mp3")
    except PermissionError:
        await ctx.send("Usa el comando !stop")
        return

    voiceChannel = discord.utils.get(ctx.guild.voice_channels, name = 'General')
    await voiceChannel.connect()
    voice = discord.utils.get(client.voice_clients, guild = ctx.guild)

    ydl_opts = \
        {
        'format': 'bestaudio/best',
        'postprocessors' :
            [{
            'key' : 'FFmpegExtractAudio',
            'preferredcodec' : 'mp3',
            'preferredquality' : '192',
            }],
    }
    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
        ydl.download([url])
    for file in os.listdir("./"):
        if file.endswith("mp3"):
            os.rename(file, "song.mp3")
    voice.play(discord.FFmpegPCMAudio("song.mp3"))


@client.command()
async def leave(ctx):
    voice = discord.utils.get(client.voice_clients, guild = ctx.guild)
    if voice.is_connected():
        await voice.disconnect()
    else:
        await ctx.send("El bot no está conectado al canal de voz")

@client.command()
async def pause(ctx):
    voice = discord.utils.get(client.voice_clients, guild = ctx.guild)
    if voice.is_playing():
        voice.pause()
    else:
        await ctx.send("No hay ninguna canción sonando actualmente")

@client.command()
async def resume(ctx):
    voice = discord.utils.get(client.voice_clients, guild = ctx.guild)
    if voice.is_paused():
        voice.resume()
    else:
        await ctx.send("La canción no está pausada")

@client.command()
async def stop(ctx):
    voice = discord.utils.get(client.voice_clients, guild = ctx.guild)
    voice.stop()

client.run(os.getenv("TOKEN"))