find xml(list)
        :param url: contents url
        :param markup: markup provider
        :param tag: find tag
        :param pattern: xml file pattern
        :return: BeautifulSoup object list

def find_xml_all(cls, url, markup, tag, pattern):
        """
        find xml(list)
        :param url: contents url
        :param markup: markup provider
        :param tag: find tag
        :param pattern: xml file pattern
        :return: BeautifulSoup object list
        """
        body = cls.find_xml(url, markup)
        return body.find_all(tag, href=re.compile(pattern))