Armour is not working?

[Windspar]

Maybe a different approach will help.
Like making simple framework interface.
Example. An idea how to start.

class EquipArmor:
    def __init__(self):
        self.head = None
        self.chest = None
        self.legs = None
        self.feet = None

    # Check if armor can be equip.
    def equip_chest(self, armor):
        if armor is None:
            self.chest = None
            return True

        if isinstance(armor, ChestArmor):
            self.chest = armor
            return True

        return False

    # Get total protection from all armor.
    def get_protection(self):
        protection = 0
        for armor in vars(self).values():
            if armor:
                protection += armor.protection

        return protection

class Armor:
    library = {}

    def __init__(self, name, protection):
        # Make sure that all armor will have a name and protection variables.
        self.name = name
        self.protection = protection
        Armor.library[self.name] = self

# Identify armor type
class ChestArmor(Armor):
    def __init__(self, name, protection):
        Armor.__init__(self, name, protection)

ChestArmor("Leather Chest Plate", 5)
ChestArmor("Leather", 2)

player = EquipArmor()
print(player.get_protection())

player.equip_chest(Armor.library["Leather Chest Plate"])
print(player.get_protection())

player.equip_chest(Armor.library["Leather"])
print(player.get_protection())