Python - can I programmatically decorate class methods from a class instance?

I have an object hierarchy in which almost all of the methods are class methods. It looks like the following:

class ParentObject(object):
    def __init__(self):
        pass

    @classmethod
    def smile_warmly(cls, the_method):
        def wrapper(kls, *args, **kwargs):
            print "-smile_warmly - "+kls.__name__
            the_method(*args, **kwargs)
        return wrapper

    @classmethod
    def greetings(cls):
        print "greetings"

class SonObject(ParentObject):
    @classmethod
    def hello_son(cls):
        print "hello son"

    @classmethod
    def goodbye(cls):
        print "goodbye son"

class DaughterObject(ParentObject):
    @classmethod
    def hello_daughter(cls):
        print "hello daughter"

    @classmethod
    def goodbye(cls):
        print "goodbye daughter"

if __name__ == '__main__':
    son = SonObject()
    son.greetings()
    son.hello_son()
    son.goodbye()
    daughter = DaughterObject()
    daughter.greetings()
    daughter.hello_daughter()
    daughter.goodbye()

The code as given outputs the following:

greetings
hello son
goodbye son
greetings
hello daughter
goodbye daughter

I would like the code to output the following:

-smile_warmly - SonObject
greetings
-smile_warmly - SonObject
hello son
-smile_warmly - SonObject
goodbye son
-smile_warmly - DaughterObject
greetings
-smile_warmly - DaughterObject
hello daughter
-smile_warmly - DaughterObject
goodbye daughter

But I don't want to add the line @smile_warmly before each method (and when I try to do that in the code above, I get error message TypeError: 'classmethod' object is not callable). Rather, I would like the decoration of each method to take place programmatically in the __init__() method.

Is it possible to programmatically decorate methods in Python?

EDIT: Found something that seems