# Buggy code
async def _playlist_save(
    self,
    ctx: commands.Context,
    playlist_name: str,
    playlist_url: str,
    *,
    scope_data: ScopeParser = None,
):
    """Save a playlist from a url.

    **Usage**:
    ​ ​ ​ ​ [p]playlist save name url 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 save MyGuildPlaylist
    https://www.youtube.com/playlist?list=PLx0sYbCqOb8Q_CLZC2BdBSKEEB59BOPUM
    ​ ​ ​ ​ [p]playlist save MyGlobalPlaylist
    https://www.youtube.com/playlist?list=PLx0sYbCqOb8Q_CLZC2BdBSKEEB59BOPUM --scope Global
    ​ ​ ​ ​ [p]playlist save MyPersonalPlaylist
    https://open.spotify.com/playlist/1RyeIbyFeIJVnNzlGr5KkR --scope User
    """
    if scope_data is None:
        scope_data = [PlaylistScope.GUILD.value, ctx.author, ctx.guild, False]
    scope, author, guild, specified_user = scope_data
    scope_name = humanize_scope(
        scope, ctx=guild if scope == PlaylistScope.GUILD.value else author
    )

    temp_playlist = FakePlaylist(author.id, scope)
    if not await self.can_manage_playlist(scope, temp_playlist, ctx, author, guild):
        return
    playlist_name = playlist_name.split(" ")[0].strip('"')[:32]
    if playlist_name.isnumeric():
        return await self._embed_msg(
            ctx,
            _(
                "Playlist names must be a single word (up to 32 "
                "characters) and not numbers only."
            ),
        )
    if not await self._playlist_check(ctx):
        return
    player = lavalink.get_player(ctx.guild.id)
    tracklist = await self._playlist_tracks(
        ctx, player, audio_dataclasses.Query.process_input(playlist_url)
    )
    if tracklist is not None:
        playlist = await create_playlist(
            ctx, scope, playlist_name, playlist_url, tracklist, author, guild
        )
        return await self._embed_msg(
            ctx,
            _(
                "Playlist {name} (`{id}`) [**{scope}**] saved: {num} tracks added."
            ).format(
                name=playlist.name, num=len(tracklist), 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_save(
    self,
    ctx: commands.Context,
    playlist_name: str,
    playlist_url: str,
    *,
    scope_data: ScopeParser = None,
):
    """Save a playlist from a url.

    **Usage**:
    ​ ​ ​ ​ [p]playlist save name url 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 save MyGuildPlaylist
    https://www.youtube.com/playlist?list=PLx0sYbCqOb8Q_CLZC2BdBSKEEB59BOPUM
    ​ ​ ​ ​ [p]playlist save MyGlobalPlaylist
    https://www.youtube.com/playlist?list=PLx0sYbCqOb8Q_CLZC2BdBSKEEB59BOPUM --scope Global
    ​ ​ ​ ​ [p]playlist save MyPersonalPlaylist
    https://open.spotify.com/playlist/1RyeIbyFeIJVnNzlGr5KkR --scope User
    """
    if scope_data is None:
        scope_data = [PlaylistScope.GUILD.value, ctx.author, ctx.guild, False]
    scope, author, guild, specified_user = scope_data
    scope_name = humanize_scope(
        scope, ctx=guild if scope == PlaylistScope.GUILD.value else author
    )

    temp_playlist = FakePlaylist(author.id, scope)
    if not await self.can_manage_playlist(scope, temp_playlist, ctx, author, guild):
        return ctx.command.reset_cooldown(ctx)
    playlist_name = playlist_name.split(" ")[0].strip('"')[:32]
    if playlist_name.isnumeric():
        ctx.command.reset_cooldown(ctx)
        return await self._embed_msg(
            ctx,
            title=_("Invalid Playlist Name"),
            description=_(
                "Playlist names must be a single word (up to 32 "
                "characters) and not numbers only."
            ),
        )
    if not await self._playlist_check(ctx):
        ctx.command.reset_cooldown(ctx)
        return
    player = lavalink.get_player(ctx.guild.id)
    tracklist = await self._playlist_tracks(
        ctx, player, audio_dataclasses.Query.process_input(playlist_url)
    )
    if isinstance(tracklist, discord.Message):
        return None
    if tracklist is not None:
        playlist = await create_playlist(
            ctx, scope, playlist_name, playlist_url, tracklist, author, guild
        )
        return await self._embed_msg(
            ctx,
            title=_("Playlist Created"),
            description=_(
                "Playlist {name} (`{id}`) [**{scope}**] saved: {num} tracks added."
            ).format(
                name=playlist.name, num=len(tracklist), id=playlist.id, scope=scope_name
            ),
        )