returning title on youtube playlists

[quekky]

I try to get the list of playlists from a user playlist page. It works however there is only URL returned (no title)

eg,

ydl = YoutubeDL({'quiet':False,'extract_flat':True,'dump_single_json':True})
res = ydl.extract_info('https://www.youtube.com/user/CNETTV/playlists')
print(rest)

the returned result only contains url

(same for cli)

# youtube-dl.exe -j --flat-playlist https://www.youtube.com/user/CNETTV/playlists
{"_type": "url", "url": "https://www.youtube.com/playlist?list=PLAl4aZK3mRv1ydJm1nXwZ9Toz_mSlOesg", "ie_key": "YoutubePlaylist"}
{"_type": "url", "url": "https://www.youtube.com/playlist?list=PL29BED3BCF9244BA0", "ie_key": "YoutubePlaylist"}
{"_type": "url", "url": "https://www.youtube.com/playlist?list=PLAl4aZK3mRv1c8dKfLFX2W5diuo8qHwIn", "ie_key": "YoutubePlaylist"}
{"_type": "url", "url": "https://www.youtube.com/playlist?list=PLAl4aZK3mRv3IcNpOPB93hLv4I6eTjL49", "ie_key": "YoutubePlaylist"}
....

---

So I looked into the source code and edited youtube.py to return title:

class YoutubePlaylistsBaseInfoExtractor(YoutubeEntryListBaseInfoExtractor):
    def _process_page(self, content):
        for playlist_id, video_title in orderedSet(re.findall(
                r'<h3[^>]+class="[^"]*yt-lockup-title[^"]*"[^>]*><a[^>]+href="/?playlist\?list=([0-9A-Za-z-_]{10,})"(?:[^>]+>(?P<title>[^<]+))?',
                content)):
            video_title = unescapeHTML(video_title)
            if video_title:
                video_title = video_title.strip()
            yield self.url_result(
                'https://www.youtube.com/playlist?list=%s' % playlist_id, 'YoutubePlaylist', video_title=video_title)

now it returns title of the playlist

{"_type": "url", "url": "https://www.youtube.com/playlist?list=PLAl4aZK3mRv1ydJm1nXwZ9Toz_mSlOesg", "ie_key": "YoutubePlaylist", "title": "CNET special features"}
{"_type": "url", "url": "https://www.youtube.com/playlist?list=PL29BED3BCF9244BA0", "ie_key": "YoutubePlaylist", "title": "CNET First Look videos "}