@classmethod
    def validate(cls, mapper_spec):
        super(DjangoModelInputReader, cls).validate(mapper_spec)

        params = _get_params(mapper_spec)

        if cls.NAMESPACE_PARAM in params:
            raise BadReaderParamsError("Namespaces are not supported.")

        entity_kind_name = params[cls.ENTITY_KIND_PARAM]
        try:
            util.for_name(entity_kind_name)
        except ImportError, e:
            raise BadReaderParamsError(e % "Bad entity kind: %s")
dataset/ETHPy150Open django-nonrel/djangoappengine/djangoappengine/mapreduce/input_readers.py/DjangoModelInputReader.validate/swapped operands of `%`