Copilot is helpful

playlist.py

"""
{
  "playlist": {
    "creator": "iliekcomputers",
    "date": "2021-02-28T11:41:15.994353+00:00",
    "extension": {
      "https://musicbrainz.org/doc/jspf#playlist": {
        "creator": "iliekcomputers",
        "last_modified_at": "2021-02-28T11:41:45.453529+00:00",
        "public": true
      }
    },
    "identifier": "https://listenbrainz.org/playlist/51b7ecc6-87ce-47a2-8bd9-05dd82d8e237",
    "title": "India",
    "track": [
      {
        "creator": "Prateek Kuhad",
        "extension": {
          "https://musicbrainz.org/doc/jspf#track": {
            "added_at": "2021-02-28T11:41:45.443570+00:00",
            "added_by": "iliekcomputers",
            "artist_identifier": [
              "https://musicbrainz.org/artist/810b210f-b461-4f02-aff2-dff91196147e"
            ]
          }
        },
        "identifier": "https://musicbrainz.org/recording/600d3615-40c4-4686-97a3-754a7c463250",
        "title": "cold / mess"
      }
    ]
  }
}
"""

class Track:
    def __init__(self, identifier, title, creator, extension):
        self.identifier = identifier
        self.title = title
        self.creator = creator
        self.extension = extension


class Playlist:
    def __init__(self, identifier, title, creator, date, extension):
        self.identifier = identifier
        self.title = title
        self.creator = creator
        self.date = date
        self.extension = extension
        self.tracks = []

    def from_json(self, json):
        self.identifier = json['playlist']['identifier']
        self.title = json['playlist']['title']
        self.creator = json['playlist']['creator']
        self.date = json['playlist']['date']
        self.extension = json['playlist']['extension']
        self.tracks = []
        for track in json['playlist']['track']:
            self.tracks.append(
                Track(track['identifier'], track['title'], track['creator'], track['extension']))