SpotipyでAPIを使って、artist_related_artistsを上限の50まで取得する。

def get_related_artists(artist_id):
    results = sp.artist_related_artists(artist_id)
    artists = results['artists']
    num_artists = len(artists)
    count = 0
    while num_artists < 50 and count < 5:
        # call the function again
        results = sp.artist_related_artists(artist_id)
        artists.extend(results['artists'])
        num_artists = len(artists)
        count += 1
    return artists