@abc.abstractmethod<EOL><INDENT>def set_weight(self, weight):<DEDENT>
pass<EOL>
Sets the weight on a scale from 0-100.

        :param weight: the new weight
        :type weight: ``cardinal``
        :raise: ``InvalidArgument`` -- ``weight`` is invalid
        :raise: ``NoAccess`` -- ``Metadata.isReadOnly()`` is ``true``

        *compliance: mandatory -- This method must be implemented.*