A strange bug in discord.py music bot - python-3.x

Question

I'm making a discord.py bot that can play music. When I run it on my local machine sometimes everything works just fine but sometimes when I try running it with a playlist, it just cant find songs in the playlist.
Here is the play command:
#commands.command(name='play',aliases=["p","sing"])
async def _play(self, ctx: commands.Context, *, song1: str):
"""Plays a song.
If there are songs in the queue, this will be queued until the
other songs finished playing.
This command automatically searches from various sites if no URL is provided.
A list of these sites can be found here: https://rg3.github.io/youtube-dl/supportedsites.html
"""
if not ctx.voice_state.voice:
await ctx.invoke(self._join)
x = False
if "playlist?" not in song1:
songs = [song1]
else:
x = True
"""html_content = urllib.request.urlopen(song1)
html_content = html_content.read().decode()"""
r = requests.get(song1)
html_content = r.text
pattern = "href=\"\/watch\?v=(.{11})"
songs = re.findall(pattern,html_content)
print(f"Before: {songs}")
songs = list(dict.fromkeys(songs))
print(f"after: {songs}")
#songs.append(f"https://www.youtube.com/watch?v={code}")
for search in songs:
s = search if not x else f"https://www.youtube.com/watch?v={search}"
try:
source = await YTDLSource.create_source(ctx, s, loop=self.bot.loop)
except YTDLError as e:
await ctx.send('An error occurred while processing this request: {}'.format(str(e)))
else:
song = Song(source)
await ctx.voice_state.songs.put(song)
if not x:
await ctx.send('Enqueued {}'.format(str(source)))
if x:
await ctx.send(f"Succesfully queued the playlist `{song1}`")
Here what is in the console
Command that I run I discord:
pplay https://www.youtube.com/playlist?list=PL2n_fVXKImKlfv3PlcHZTzLk3CoGUV9Hm
output when it works:
Before: ['gEbRqpFkTBk', 'gEbRqpFkTBk', 'gEbRqpFkTBk', 'gEbRqpFkTBk', '4ZvnbsfXRk0', '4ZvnbsfXRk0', 'besNDPvEwQw', 'besNDPvEwQw', 'QglaLzo_aPk', 'QglaLzo_aPk', 'YJTae5ScvQA', 'YJTae5ScvQA', '9Va88Kt0NN0', '9Va88Kt0NN0']
after: ['gEbRqpFkTBk', '4ZvnbsfXRk0', 'besNDPvEwQw', 'QglaLzo_aPk', 'YJTae5ScvQA', '9Va88Kt0NN0']
output most of the time:
Before: []
after: []
It doesn't give any error.

Answer 1

You can use the extract_info method from youtube-dl :
video_list = []
with youtube_dl.YoutubeDL() as ydl:
playlist = ydl.extract_info(url='playlist url', download=False)['entries']
for video in playlist:
video_list.append(video['webpage_url'])
video_list will contain every URLs from your playlist's videos.