class B(instance_tracker('_registry')):
def __init__(self, x):
self.x = x
super().__init__()
class A(instance_tracker('instances')):
pass
class Tracked(instance_tracker()):
pass
class A(instance_tracker()):
pass
class Squirrel(instance_tracker(), Animal):
def __init__(self, name, nervousness=0.99):
self.nervousness = nervousness
super().__init__(name)
class Tracked(instance_tracker()):
def __init__(self, something):
self.something = something
super().__init__()