calculated.py 文件源码

def __init__(self, depends_on, encoder=ENC_BITS_DEFAULT, fuzzable=True, name=None):
        '''
        :param depends_on: (name of) field we depend on
        :type encoder: :class:`~kitty.model.low_level.encoder.BitsEncoder`
        :param encoder: encoder for the field
        :param fuzzable: is container fuzzable
        :param name: (unique) name of the container
        '''
        self._rendered_field = None
        self.dependency_type = Calculated.VALUE_BASED
        super(Calculated, self).__init__(value=self.__class__._default_value_, encoder=encoder, fuzzable=fuzzable, name=name)
        if isinstance(depends_on, types.StringTypes):
            self._field_name = depends_on
            self._field = None
        elif isinstance(depends_on, BaseField):
            self._field_name = None
            self._field = depends_on
        else:
            raise KittyException('depends_on parameter (%s) is neither a string nor a valid field' % depends_on)