def delete_clef(request, page_id): if request.method == 'POST': clefs_to_delete = json.loads(request.POST['data']) p = get_object_or_404(Page, pk=page_id) fname = p.get_job_path(j, 'mei') md = ModifyDocument(fname) md.delete_clef(clefs_to_delete) md.write_doc() return {}