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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _extract_response_xml(self, domain, response):
 """Extract XML content of an HTTP response into dictionary format. Args: response: HTML Response objects Returns: A dictionary: {alexa-ranking key : alexa-ranking value}. """

        attributes = {}
        alexa_keys = {'POPULARITY': 'TEXT', 'REACH': 'RANK', 'RANK': 'DELTA'}
        try:
            xml_root = ET.fromstring(response._content)
            for xml_child in xml_root.findall('SD//'):
                if xml_child.tag in alexa_keys and \
                        alexa_keys[xml_child.tag] in xml_child.attrib:
                    attributes[xml_child.tag.lower(
                    )] = xml_child.attrib[alexa_keys[xml_child.tag]]
        except ParseError:
            # Skip ill-formatted XML and return no Alexa attributes
            pass
        attributes['domain'] = domain
        return {'attributes': attributes}