## ----警告= false，消息= false --------------------------------------------------------------------------------------库（omadb）load（'../ data/hog.rda'）print（hog）getObjectAttributes（hog）hog_id = getAttribute（hog，'hog_id''）dim（parent_hogs）parent_hog_id = parent_hogs [[hog_id]] childris_hogs = getAttribute（hog，'children_hogs'）children_hogs childry_hogs child_hog_ids = childris_hogs [['hog_id']]