code: def ip6_address(self):
          
          if self._ip6_address is None and self.network is not None:
              self._ip6_address = self._get_ip_address(
                  libvirt.VIR_IP_ADDR_TYPE_IPV6)
  
          return self._ip6_address
docs: Returns the IPv6 address of the network interface.
  
          If multiple interfaces are provided,
          the address of the first found is returned.