static methods

Julien Danjou has a great guide on how to use static, class, or abstract methods in python.

# class method
class TrackedObject:
    __id__ = 0

    def __init__(self, x, id = None):
        self.x = x
        if id != None:
            self.id = id
        else:
            self.id = self.__class__.__id__
            self.__class__.__id__ += 1

    @classmethod
    def reset(cls):
        cls.__id__ = 0
#

# class method

class TrackedObject:

__id__ = 0

def __init__(self, x, id = None):

self.x = x

if id != None:

self.id = id

else:

self.id = self.__class__.__id__

self.__class__.__id__ += 1

@classmethod

def reset(cls):

cls.__id__ = 0