code: def check_obfuscated_ip (self):
          
          # check if self.host can be an IP address
          # check for obfuscated IP address
          if iputil.is_obfuscated_ip(self.host):
              ips = iputil.resolve_host(self.host)
              if ips:
                  self.host = ips[0]
                  self.add_warning(
                     _("URL %(url)s has obfuscated IP address %(ip)s") % \
                     {"url": self.base_url, "ip": ips[0]},
                            tag=WARN_URL_OBFUSCATED_IP)
docs: Warn if host of this URL is obfuscated IP address.