tmp.py

class Bunny(object):

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

    def __str__(self):
        return '%s: %s' % (self.name, str(self.age))

    def __int__(self):
        return self.age

    def __call__(self, age):
        self.age += age

    def jump(self):
        print('{} is jumping'.format(self.name))

    @staticmethod
    def new_young_bunnies(*args, **kwargs):
        age = kwargs.get('age', 0)
        bunnies = []
        for name in args:
            bunnies.append(Bunny(name, age))
        return bunnies

    @staticmethod
    def new_young_bunnies_with_ages(*args):
        bunnies = []
        for name, age in args:
            bunnies.append(Bunny(name, age))
        return bunnies