451             if ips and ips[-1]._version != ip._version:
456             if ips and ips[-1]._version != ip._version:
464             if nets and nets[-1]._version != ip._version:
540             raise AddressValueError(msg % (address, self._version))
544                                            self._version))
554                                            expected_len, self._version))
678                     self._version == other._version)
688         if self._version != other._version:
717         return (self._version, self)
777         if self._version != other._version:
788             return (self._version == other._version and
799         if self._version != other._version:
899         if not self._version == other._version:
971         if self._version != other._version:
994         return (self._version, self.network_address, self.netmask)
1105             if a._version != b._version:
1203     _version = 4  variable in _BaseV4
1359         return self._version
1722     _version = 6  variable in _BaseV6
1994         return self._version