album_tracks.py

def get_album_tracks(album_id):
    """
    Returns: dictionary object.
        Track ids as keys, track names as values.
    """
    tracks = []
    results = sp.album_tracks(album_id)
    tracks.extend(results['items'])
    # By default album_tracks function can obtain up to 50 item from spotify API in one try.
    # If there is more than 50 items, this function will return 'next'.
    while results['next']:
        results = sp.next(results)
        tracks.extend(results['items'])

    seen = set() # to avoid duplicates
    track_dct = dict() # to keep name and id of albums.
    tracks.sort(key=lambda track:track['name'].lower()) # sort tracks by name.
    for track in tracks:
        name = track['name']
        track_id = track['id']
        if name not in seen:
            seen.add(name)
            track_dct[track_id] = name
    return track_dct