def extract_css_links(bs4):
    """Extracting css links from BeautifulSoup object

    :param bs4: `BeautifulSoup`
    :return: `list` List of links
    """

    links = extract_links(bs4)

    real_css = [anchor for anchor in links if anchor.endswith(('.css', '.CSS'))]

    css_link_tags = [anchor['href'] for anchor in bs4.select('link[type="text/css"]')
                     if anchor.has_attr('href')]

    return list(set(real_css+css_link_tags))
Extracting css links from BeautifulSoup object

    :param bs4: `BeautifulSoup`
    :return: `list` List of links