def _get_first_part_id(self, assessment_id):
if assessment_id not in self._first_part_index:<EOL><INDENT>self._first_part_index[assessment_id] = get_first_part_id_for_assessment(<EOL>assessment_id,<EOL>runtime=self._runtime,<EOL>proxy=self._proxy,<EOL>create=True,<EOL>bank_id=self._catalog_id)<EOL><DEDENT>return self._first_part_index[assessment_id]<EOL>
This session implemenation assumes all items are assigned to the first assessment part