# superCall2.py                                              DMQ 6/20/04
" showing use of cooperative super calls "
# Must call each __init__ in the MRO of a new instance once,
# and only once.

## Inheritance diagram:
##    Animal  ->  Mammal  -> (Feline) ->  Cat
##    \ - - - ->  Mammal2 - - - - - - ->  /

class Animal(object):
    _count = 0
    def __init__(self):
        Animal._count += 1

class Mammal(Animal):
    _count = 0
    def __init__(self):
        Mammal._count += 1
        Animal.__init__(self)
##        super(Mammal,self).__init__()
class Mammal2(Animal):
    _count = 0
    def __init__(self):
        Mammal2._count += 1
        Animal.__init__(self)
##        super(Mammal2,self).__init__()
        
##class Feline(Mammal):
##    _count = 0
##    def __init__(self):
##        Feline._count += 1
##        super(Feline,self).__init__()
        
class Cat(Mammal, Mammal2):
    _count = 0
    def __init__(self, name=None, sound=None):
        Cat._count += 1
        Mammal.__init__(self)
        Mammal2.__init__(self)
##        super(Cat,self).__init__()
        self.name = name
        self.sound = sound
    def talk(self):
        print "Cat:", self.name, "says...", self.sound

def inventory(cls, indent=0):
    if cls is not object:
        print '.  '*indent + cls.__name__, cls._count
    for C in cls.__bases__:
        inventory(C, indent+1)

a = Animal()
m = Mammal()
c = Cat('Garfield','Meow')
c.talk()

inventory(Cat)