What's an example use case for a Python classmethod?

Question

I\'ve read What are Class methods in Python for? but the examples in that post are complex. I am looking for a clear, simple, bare-bones example of a particular use case fo

Answer 1

I don't know, something like named constructor methods?

class UniqueIdentifier(object):

    value = 0

    def __init__(self, name):
        self.name = name

    @classmethod
    def produce(cls):
        instance = cls(cls.value)
        cls.value += 1
        return instance

class FunkyUniqueIdentifier(UniqueIdentifier):

    @classmethod
    def produce(cls):
        instance = super(FunkyUniqueIdentifier, cls).produce()
        instance.name = "Funky %s" % instance.name
        return instance

Usage:

>>> x = UniqueIdentifier.produce()
>>> y = FunkyUniqueIdentifier.produce()
>>> x.name
0
>>> y.name
Funky 1