# Buggy code
async def _playlist_delete(
    self,
    ctx: commands.Context,
    playlist_matches: PlaylistConverter,
    *,
    scope_data: ScopeParser = None,
):
    """Delete a saved playlist.

    **Usage**:
    ​ ​ ​ ​ [p]playlist delete playlist_name_OR_id args

    **Args**:
    ​ ​ ​ ​ The following are all optional:
    ​ ​ ​ ​ ​ ​ ​ ​ --scope <scope>
    ​ ​ ​ ​ ​ ​ ​ ​ --author [user]
    ​ ​ ​ ​ ​ ​ ​ ​ --guild [guild] **Only the bot owner can use this**

    Scope is one of the following:
    ​ ​ ​ ​ Global
    ​ ​ ​ ​ Guild
    ​ ​ ​ ​ User

    Author can be one of the following:
    ​ ​ ​ ​ User ID
    ​ ​ ​ ​ User Mention
    ​ ​ ​ ​ User Name#123

    Guild can be one of the following:
    ​ ​ ​ ​ Guild ID
    ​ ​ ​ ​ Exact guild name

    Example use:
    ​ ​ ​ ​ [p]playlist delete MyGuildPlaylist
    ​ ​ ​ ​ [p]playlist delete MyGlobalPlaylist --scope Global
    ​ ​ ​ ​ [p]playlist delete MyPersonalPlaylist --scope User
    """
    if scope_data is None:
        scope_data = [PlaylistScope.GUILD.value, ctx.author, ctx.guild, False]
    scope, author, guild, specified_user = scope_data

    try:
        playlist_id, playlist_arg = await self._get_correct_playlist_id(
            ctx, playlist_matches, scope, author, guild, specified_user
        )
    except TooManyMatches as e:
        return await self._embed_msg(ctx, str(e))
    if playlist_id is None:
        return await self._embed_msg(
            ctx, _("Could not match '{arg}' to a playlist.").format(arg=playlist_arg)
        )

    try:
        playlist = await get_playlist(playlist_id, scope, self.bot, guild, author)
    except RuntimeError:
        return await self._embed_msg(
            ctx,
            _("Playlist {id} does not exist in {scope} scope.").format(
                id=playlist_id, scope=humanize_scope(scope, the=True)
            ),
        )
    except MissingGuild:
        return await self._embed_msg(
            ctx, _("You need to specify the Guild ID for the guild to lookup.")
        )

    if not await self.can_manage_playlist(scope, playlist, ctx, author, guild):
        return
    scope_name = humanize_scope(
        scope, ctx=guild if scope == PlaylistScope.GUILD.value else author
    )
    await delete_playlist(scope, playlist.id, guild or ctx.guild, author or ctx.author)

    await self._embed_msg(
        ctx,
        _("{name} (`{id}`) [**{scope}**] playlist deleted.").format(
            name=playlist.name, id=playlist.id, scope=scope_name
        ),
    )


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/core.py", line 79, in wrapped
ret = await coro(*args, **kwargs)
File "/home/martinebots/martinebotscogs/cogs_modified/audio/audio.py", line 3183, in play
await self._enqueue_tracks(ctx, query)
File "/home/martinebots/martinebotscogs/cogs_modified/audio/audio.py", line 3885, in _enqueue_tracks
result, called_api = await self.music_cache.lavalink_query(ctx, player, query)
File "/home/martinebots/martinebotscogs/cogs_modified/audio/apis.py", line 911, in lavalink_query
results = await player.load_tracks(query)
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/lavalink/rest_api.py", line 300, in load_tracks
self.__check_node_ready()
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/lavalink/rest_api.py", line 268, in __check_node_ready
raise RuntimeError("Cannot execute REST request when node not ready.")
RuntimeError: Cannot execute REST request when node not ready.

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

Traceback (most recent call last):
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/bot.py", line 863, in invoke
await ctx.command.invoke(ctx)
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/core.py", line 728, in invoke
await injected(*ctx.args, **ctx.kwargs)
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/core.py", line 88, in wrapped
raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: RuntimeError: Cannot execute REST request when node not ready.```

# Fixed code
async def _playlist_delete(
    self,
    ctx: commands.Context,
    playlist_matches: PlaylistConverter,
    *,
    scope_data: ScopeParser = None,
):
    """Delete a saved playlist.

    **Usage**:
    ​ ​ ​ ​ [p]playlist delete playlist_name_OR_id args

    **Args**:
    ​ ​ ​ ​ The following are all optional:
    ​ ​ ​ ​ ​ ​ ​ ​ --scope <scope>
    ​ ​ ​ ​ ​ ​ ​ ​ --author [user]
    ​ ​ ​ ​ ​ ​ ​ ​ --guild [guild] **Only the bot owner can use this**

    **Scope** is one of the following:
    ​ ​ ​ ​ Global
    ​ ​ ​ ​ Guild
    ​ ​ ​ ​ User

    **Author** can be one of the following:
    ​ ​ ​ ​ User ID
    ​ ​ ​ ​ User Mention
    ​ ​ ​ ​ User Name#123

    **Guild** can be one of the following:
    ​ ​ ​ ​ Guild ID
    ​ ​ ​ ​ Exact guild name

    Example use:
    ​ ​ ​ ​ [p]playlist delete MyGuildPlaylist
    ​ ​ ​ ​ [p]playlist delete MyGlobalPlaylist --scope Global
    ​ ​ ​ ​ [p]playlist delete MyPersonalPlaylist --scope User
    """
    if scope_data is None:
        scope_data = [PlaylistScope.GUILD.value, ctx.author, ctx.guild, False]
    scope, author, guild, specified_user = scope_data

    try:
        playlist_id, playlist_arg = await self._get_correct_playlist_id(
            ctx, playlist_matches, scope, author, guild, specified_user
        )
    except TooManyMatches as e:
        return await self._embed_msg(ctx, title=str(e))
    if playlist_id is None:
        return await self._embed_msg(
            ctx,
            title=_("Playlist Not Found"),
            description=_("Could not match '{arg}' to a playlist.").format(
                arg=playlist_arg
            ),
        )

    try:
        playlist = await get_playlist(playlist_id, scope, self.bot, guild, author)
    except RuntimeError:
        return await self._embed_msg(
            ctx,
            title=_("Playlist {id} does not exist in {scope} scope.").format(
                id=playlist_id, scope=humanize_scope(scope, the=True)
            ),
        )
    except MissingGuild:
        return await self._embed_msg(
            ctx, title=_("You need to specify the Guild ID for the guild to lookup.")
        )

    if not await self.can_manage_playlist(scope, playlist, ctx, author, guild):
        return
    scope_name = humanize_scope(
        scope, ctx=guild if scope == PlaylistScope.GUILD.value else author
    )
    await delete_playlist(scope, playlist.id, guild or ctx.guild, author or ctx.author)

    await self._embed_msg(
        ctx,
        title=_("Playlist Deleted"),
        description=_("{name} (`{id}`) [**{scope}**] playlist deleted.").format(
            name=playlist.name, id=playlist.id, scope=scope_name
        ),
    )