python - AttributeError: 'RangedWeapon' object has no attribute 'owner' -

in person object, there support inventory, , when person object takes weapon object or food object, object go inventory. tribute object, want retrieve weapon objects inventory creating new method in tribute class, get_weapons(), return tuple of weapon objects tribute has in inventory.

class tribute(person):    ...       def get_weapons(self):             self.weapons=[]             item in self.get_inventory():                 if isinstance(item,weapon):                     self.weapons.append(item)             return tuple(self.weapons)  cc = tribute("chee chin", 100) chicken = food("chicken", 5) aloe_vera = medicine("aloe vera", 2, 5) bow = rangedweapon("bow", 4, 10) sword = weapon("sword", 2, 5)  base = place("base") base.add_object(cc) base.add_object(chicken) base.add_object(aloe_vera) base.add_object(bow) base.add_object(sword)  cc.take(bow)                           # chee chin took bow cc.take(sword)                         # chee chin took sword cc.take(chicken)                       # chee chin took chicken cc.take(aloe_vera)                     # chee chin took aloe_vera 

but keep getting attributeerror: 'rangedweapon' object has no attribute 'owner'. i'm not sure went wrong. appreciate help. thank you!

import random collections import ordereddict  ###################### # class: namedobject # ######################  class namedobject(object):     def __init__(self, name):         self.name = name      def get_name(self):         return self.name  ####################### # class: mobileobject # #######################  class mobileobject(namedobject):     def __init__(self, name, place):         super().__init__(name)         self.place = place      def get_place(self):         return self.place  ################ # class: thing # ################  class thing(mobileobject):     def __init__(self, name):         super().__init__(name, none)         self.owner = none      def set_owner(self, owner):         self.owner = owner      def get_owner(self):         return self.owner      def is_owned(self):         return self.owner not none  ################# # class: person # #################  class person(livingthing):     def __init__(self, name, health, threshold):         self.inventory = []         super().__init__(name, health, threshold)      def take(self, thing):         # can take things in current location , not owned others         if isinstance(thing, thing) , thing in self.place.objects , not thing.is_owned():             thing.set_owner(self)             self.inventory.append(thing)             self.place.del_object(thing)             game_logger.add_event("took", self, thing)         else:             game_logger.warning("{} cannot take {}.".format(self.get_name(), thing.get_name()))      def remove_item(self, thing):         #can remove things in inventory         if isinstance(thing, thing) , thing in self.get_inventory() , thing.get_owner()==self:             thing.set_owner(none)             self.inventory.remove(thing)         else:             game_logger.warning("{} not own {}.".format(self.get_name(), thing.get_name()))      def go(self, direction):         new_place = self.place.get_neighbor_at(direction.upper())         if new_place not none:             self.move_to(new_place)         else:             game_logger.warning("{} cannot go {} {}".format(self.get_name(), direction, self.get_place().get_name()))      def get_inventory(self):         return list(self.inventory)      def objects_around(self):         return list(filter(lambda t: t not self, self.get_place().get_objects()))      def get_exits(self):         return self.get_place().get_exits()`    class weapon(thing):      def __init__(self, name, min_dmg, max_dmg):         self.name=name         self.min_dmg=min_dmg         self.max_dmg=max_dmg      def min_damage(self):         return self.min_dmg      def max_damage(self):         return self.max_dmg      def damage(self):         return random.randint(self.min_dmg,self.max_dmg)  class rangedweapon(weapon):      def __init__(self, name, min_dmg, max_dmg):         super().__init__(name, min_dmg, max_dmg)         self.shots=0      def shots_left(self):         return self.shots      def load(self, ammo):         if ammo.weapon_type()==self.name:             self.shots+=ammo.get_quantity()             ammo.remove_all()      def damage(self):         if self.shots==0:             return 0         else:             self.shots-=1             return super().damage() 

not expert on python 3.x, but:

class weapon(thing):  def __init__(self, name, min_dmg, max_dmg):     self.name=name     self.min_dmg=min_dmg     self.max_dmg=max_dmg 

you never set weapon inherit thing - need call super().__init__ line that's appropriate thing, in weapon's ctor. annoying python quirk.

have here - @ rangedweapon's ctor - you're doing right:

 super().__init__(name, min_dmg, max_dmg)