xpath

from lxml import html
from lxml import etree

path = 'normalize-space(//div[@class="price"]/text())'
url = 'http://www.bloomberg.com/quote/USDRUB:CUR'


def get_urls_from_page(url):
    doc = html.parse(url)
    values = doc.getroot().xpath(path)
    return values


print(get_urls_from_page(url))