Traceback (most recent call last):


 "scripts/prepro_ngrams.py", line 13, in <module>

import utils


 "<path to utils.py>", line 12, in <module>

from .rewards import get_scores, get_self_cider_scores
ValueError: Attempted relative import in non-package

<class 'musicbot.exceptions.CommandError'>: ERROR: Signature extraction failed: Traceback (most recent call last):


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 1057, in _decrypt_signature

video_id, player_url, s


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 971, in _extract_signature_function

errnote='Download of %s failed' % player_url)


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\common.py", line 529, in _download_webpage

res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal, encoding=encoding, data=data, headers=headers, query=query)


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\common.py", line 436, in _download_webpage_handle

urlh = self._request_webpage(url_or_request, video_id, note, errnote, fatal, data=data, headers=headers, query=query)


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\common.py", line 416, in _request_webpage

return self._downloader.urlopen(url_or_request)


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\YoutubeDL.py", line 2000, in urlopen

req = sanitized_Request(req)


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\utils.py", line 525, in sanitized_Request

return compat_urllib_request.Request(sanitize_url(url), *args, **kwargs)


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\urllib\request.py", line 268, in __init__

self.full_url = url


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\urllib\request.py", line 294, in full_url

self._parse()


 "C:\Users\isaac\AppData\Local\Programs\Python\Python35\lib\urllib\request.py", line 323, in _parse

raise ValueError("unknown url type: %r" % self.full_url)
ValueError: unknown url type: '/yts/jsbin/player-en_US-vflV3n15C/base.js'
