static attributes (contd class robot class robotnext_serial_num def __init__(selfan_owner)self owner an_owner self idnum self get_next_idnum(def get_next_idnumself )new_idnum robot next_serial_num robot next_serial_num + return new_idnum def get_owner(self)return self owner def get_idnum(self)return self idnum end of class definition ----robot robot("zaphod"printrobot get_idnum( robot robot("trillian"printrobot get_idnum( robot robot("betelgeuse"printrobot get_idnum( purdue university