iterating through artists with spotipy to get the top tracks

gistfile1.py

for start in xrange(0, 10000, page_size):
    response = en.get('catalog/read', id=tpid, start=start,
        results=page_size, bucket=['id:spotify'])
    if len(response['catalog']['items']) == 0:
        break

    spaids = []
    for item in response['catalog']['items']:
        if 'artist_name' in item:
            spid = item['request']['item_id']
            spaids.append(spid)

    spartists = sp.artists(spaids)
    for spartist in spartists['artists']:
        image = getBestImageUrl(spartist)
        top_tracks = get_top_tracks(spartist['uri'])

        if image == None:
            print len(out), "Missing image for", spartist['name']

        if len(top_tracks) == 0:
            print len(out), "Missing tracks for", spartist['name']

        simple_artist = {
            'name' : spartist['name'],
            'uri' : spartist['uri'],
            'image': image,
            'tracks' : top_tracks
        }
        out.append(simple_artist)