coding utf-8 class TreeGenomMixin object def __unicode__ self return s

# -*- coding: utf-8 -*-

class TreeGenomMixin(object):
    def __unicode__(self):
        return super(TreeGenomMixin, self).__unicode__() + u" with wooden leg"


class Cat(object):
    def __unicode__(self):
        return u"a cat"


class Dog(object):
    def __unicode__(self):
        return u"a dog"


class GeneticallyModifiedCat(Cat, TreeGenomMixin):
    pass


class GeneticallyModifiedDog(TreeGenomMixin, Dog):
    pass


cat = GeneticallyModifiedCat()
dog = GeneticallyModifiedDog()


print unicode(cat)
print unicode(dog)