sync rhythmboxdb.xml with last.fm info (play count/rating)

rhythmbox_db_sync_lastfm.py

#!/usr/bin/python3

import json
import os
from datetime import datetime
from shutil import copy
from urllib.error import HTTPError
from urllib.request import quote
from urllib.request import urlopen
from xml.etree import ElementTree

# you should create a last fm app for api key, and fill your user name here
api_key = ""
username = ""

if api_key == "":
    if os.path.exists("api_key"):
        api_key = open("api_key").read().strip()
if username == "":
    if os.path.exists("username"):
        username = open("username").read().strip()

if not username or not api_key:
    print ("username or api_key is empty")
    exit()

rb_db_file = os.path.join(os.path.expanduser("~"), ".local/share/rhythmbox/rhythmdb.xml")
base_url = "http://ws.audioscrobbler.com/2.0/?method=track.getInfo&api_key=%s&username=%s&artist=%s&track=%s&format=json"

now = datetime.now()
copy(rb_db_file, rb_db_file + "_" + now.strftime("%Y-%m-%d-%H-%M-%S") + ".bak")

tree = ElementTree.parse(rb_db_file)
root = tree.getroot()

counter = 0
total = len(root)

for child in root:
    counter += 1

    if child.attrib["type"] == "ignore":
        continue

    if counter % 100 == 0:
        tree.write(rb_db_file)

    track = child.find("title").text
    artist = child.find("artist").text
    album = child.find("album").text
    try:
        play_count = int(child.find("play-count").text)
    except AttributeError:
        play_count = 0
    try:
        rating