playlist.py 文件源码

def extract_playlist_id(playlist_url):
    # Normal playlists start with PL, Mixes start with RD + first video ID,
    # Liked videos start with LL, Uploads start with UU,
    # Favorites lists start with FL
    idregx = re.compile(r'((?:RD|PL|LL|UU|FL)[-_0-9a-zA-Z]+)$')

    playlist_id = None
    if idregx.match(playlist_url):
        playlist_id = playlist_url # ID of video

    if '://' not in playlist_url:
        playlist_url = '//' + playlist_url
    parsedurl = urlparse(playlist_url)
    if parsedurl.netloc in ('youtube.com', 'www.youtube.com'):
        query = parse_qs(parsedurl.query)
        if 'list' in query and idregx.match(query['list'][0]):
            playlist_id = query['list'][0]

    return playlist_id