cqltypes.py 文件源码

def make_udt_class(cls, keyspace, udt_name, field_names, field_types):
        assert len(field_names) == len(field_types)

        if six.PY2 and isinstance(udt_name, unicode):
            udt_name = udt_name.encode('utf-8')

        instance = cls._cache.get((keyspace, udt_name))
        if not instance or instance.fieldnames != field_names or instance.subtypes != field_types:
            instance = type(udt_name, (cls,), {'subtypes': field_types,
                                               'cassname': cls.cassname,
                                               'typename': udt_name,
                                               'fieldnames': field_names,
                                               'keyspace': keyspace,
                                               'mapped_class': None,
                                               'tuple_type': cls._make_registered_udt_namedtuple(keyspace, udt_name, field_names)})
            cls._cache[(keyspace, udt_name)] = instance
        return instance