Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/bandcamp.py (Python)

Code before:
            'ext': 'mp3',
            'title': 'Mastodon - Hail to Fire',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'Mastodon',
            'timestamp': 1322005399,
            'upload_date': '20111122',
            'release_timestamp': 1076112000,
            'release_date': '20040207',
            'duration': 120.79,
            'track': 'Hail to Fire',
            'track_number': 5,
            'track_id': '2584466013',
            'artist': 'Mastodon',
            'album': 'Call of the Mastodon',
        },
    }]

    def _extract_data_attr(self, webpage, video_id, attr='tralbum', fatal=True):
        return self._parse_json(self._html_search_regex(
            r'data-%s=(["\'])({.+?})\1' % attr, webpage,
            attr + ' data', group=2), video_id, fatal=fatal)

    def _real_extract(self, url):
        title, uploader = self._match_valid_url(url).group('id', 'uploader')
        webpage = self._download_webpage(url, title)
        tralbum = self._extract_data_attr(webpage, title)
        thumbnail = self._og_search_thumbnail(webpage)

        track_id = None
        track = None
        track_number = None
        duration = None

        formats = []
        track_info = try_get(tralbum, lambda x: x['trackinfo'][0], dict)
        if track_info:
            file_ = track_info.get('file')
            if isinstance(file_, dict):
                for format_id, format_url in file_.items():
                    if not url_or_none(format_url):
                        continue
                    ext, abr_str = format_id.split('-', 1)
                    formats.append({
                        'format_id': format_id,
                        'url': self._proto_relative_url(format_url, 'http:'),
                        'ext': ext,
                        'vcodec': 'none',
                        'acodec': ext,
                        'abr': int_or_none(abr_str),
                    })
            track = track_info.get('title')

Review comment (suggestion):
```suggestion
            webpage, 'album artist', fatal=False)
```

Code after:
            'album_artist': 'Ben Prunty',
            'album': 'FTL: Advanced Edition Soundtrack',
            'uploader_url': 'https://benprunty.bandcamp.com',
            'uploader_id': 'benprunty',
        },
    }, {
        # no free download, mp3 128
        'url': 'https://relapsealumni.bandcamp.com/track/hail-to-fire',
        'md5': 'fec12ff55e804bb7f7ebeb77a800c8b7',
        'info_dict': {
            'id': '2584466013',
            'ext': 'mp3',
            'title': 'Mastodon - Hail to Fire',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'Mastodon',
            'timestamp': 1322005399,
            'upload_date': '20111122',
            'release_timestamp': 1076112000,
            'release_date': '20040207',
            'duration': 120.79,
            'track': 'Hail to Fire',
            'track_number': 5,
            'track_id': '2584466013',
            'artist': 'Mastodon',
            'album_artist': 'Mastodon',
            'album': 'Call of the Mastodon',
            'uploader_url': 'https://relapsealumni.bandcamp.com',
            'uploader_id': 'relapsealumni',
        },
    }, {
        # track from compilation album (artist/album_artist difference)
        'url': 'https://diskotopia.bandcamp.com/track/safehouse',
        'md5': '19c5337bca1428afa54129f86a2f6a69',
        'info_dict': {
            'id': '1978174799',
            'ext': 'mp3',
            'title': 'submerse - submerse - Safehouse',
            'thumbnail': r're:^https?://.*\.jpg$',
            'uploader': 'submerse',
            'timestamp': 1480779297,
            'upload_date': '20161203',
            'release_timestamp': 1481068800,
            'release_date': '20161207',
            'duration': 154.066,
            'track': 'submerse - Safehouse',
            'track_number': 3,
            'track_id': '1978174799',
            'artist': 'submerse',
            'album_artist': 'Diskotopia',
            'album': 'DSK F/W 2016-2017 Free Compilation',
            'uploader_url': 'https://diskotopia.bandcamp.com',