app.py

def get_ratings():
    result = {}
    url = 'https://readrate.com/rus/users/%s/books' % (os.environ.get('USERID'))
    html = lxml.html.fromstring(urllib2.urlopen(url).read())
    books = html.xpath('//div[@class="book item"]')
    for book in books:
        title = book.xpath('div/div[2]/div/div/a')[0].text
        rating = len(book.xpath('div[@class="wrapper clearfix"]/div[@class="cover"]/div[@class="picture"]/div[@class="content"]/div[@class="user-rating-stars"]/ul/li[contains(@class, "active")]'))
        result.update({title: rating})
    return result