code: def _parse_html(self):
          
  
          if self.config.parser != 'lxml':
              raise NotImplementedError('%s parser not implemented' %
                                        self.config.parser)
  
          self.parser = etree.HTMLParser()
  
          try:
              self.parsed_tree = etree.parse(StringIO(self.html), self.parser)
  
          except ValueError, e:
              if u'Unicode strings with encoding declaration are not supported' \
                      in unicode(e):
  
                  # For some reason, the HTML/XML declares another encoding
                  # in its meta tags. TODO: we should probably remove this
                  # meta tag, because the sparks detection mechanism usually
                  # does a pretty good job at finding it.
                  #
                  # For now, this will fail for anything other than utf-8 and
                  # make the program crash.
                  self.parsed_tree = etree.parse(StringIO(
                      self.html.encode('utf-8')), self.parser)
docs: Load the parser and parse `self.html`.