Accessing Class Variable in Independent Class Python2.7.1

I have a question concerning class variables in Python.

I am trying to code a simple Attack class for an RPG, and I need in this class to access variables from my Weapon class and my Character Class, yet all three have no inheritance relationship to one another. And I can't find help online due to all the threads being on inheritance.

Here are the code samples of each class:

class Character(pygame.sprite.Sprite):
    def __init__(self, hp, image, speed, x, y):
        super(Character, self).__init__()
        self.image = image
        self.rect = self.image.get_rect().move(x, y) #initial placement
        self.hp = hp

class Weapon(Item): #Parent class item is a sprite class
    def __init__(self, name, value, image, x, y, dmg):
        super(Weapon, self).__init__(name, value, image, x, y)
        self.dmg = dmg


class Attack(object):
    def __init__(self, Weapon, Character):
        self.Weapon = Weapon
        self.Character = Character      
    self.Character.hp -= self.Weapon.dmg

UPDATE ##### Indentation rectified

class Attack(object):
    def __init__(self, Weapon, Character):
        self.Weapon = Weapon
        self.Character = Character      
        self.Character.hp -= self.Weapon.dmg

When I try to run my program I get the following error:

  File "classes.py", line 136, in <module>
    class Attack(object):

  File "classes.py", line 141, in Attack
    self.Character.hp -= self.Weapon.dmg

NameError: name 'self' is not defined

Any idea on how I could access the hp variable from my Character class inside my Attack class ? Ultimately I will also need to access the dmg variable of the Weapon class inside the Attack class.

Solution

There's a problem in your indentation of self.Character.hp -= self.Weapon.dmg. This code should work:

class Attack(object):
    def __init__(self, Weapon, Character):
        self.Weapon = Weapon
        self.Character = Character      
        self.Character.hp -= self.Weapon.dmg