restoreDesign:load 之前的db
list_property -type **:列举出相应的属性
get_property:得到相应的object的属性
get_pin:获取pin
get_port:获取port
ecoRoute:eco阶段,在修改cell或者net之后进行route
ecoPlace:eco阶段,如果插入了cell,需要进行place
ecoDeleteRepeater:删除buffer
ecoAddRepeater:添加buffer
ecoChangeCell:更换cell的size
attachTerm:将pin和net连接
detachTerm:将pin和net分开
editDeleteViolation:to delete violated
globalDetailRoute:re-route the design
streamOut:写出gds文件