import urllib.request
from bs4 import BeautifulSoup

def get_xml(url):
    response = urllib.request.urlopen(url)
    return response.read()

def parse(xml):
    soup = BeautifulSoup(xml)
    print(soup.prettify())
def main():
    parse(get_xml('http://www.cbr.ru/scripts/XML_daily.asp?date_req=02/03/2002'))

if __name__ == '__main__':
    main()