@abc.abstractmethod<EOL><INDENT>def get_assessment_part_form_for_update(self, assessment_part_id):<DEDENT>
return<EOL>
Gets the assessment part form for updating an existing assessment part.

        A new assessment part form should be requested for each update
        transaction.

        :param assessment_part_id: the ``Id`` of the ``AssessmentPart``
        :type assessment_part_id: ``osid.id.Id``
        :return: the assessment part form
        :rtype: ``osid.assessment.authoring.AssessmentPartForm``
        :raise: ``NotFound`` -- ``assessment_part_id`` is not found
        :raise: ``NullArgument`` -- ``assessment_part_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred

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