mi.py

class Base(object):
    def __init__(self, pen, home):
        super(Base, self).__init__()

class HomeMixin(Base):
    def __init__(self, pen, home):
        super(HomeMixin, self).__init__(pen, home)
        self.home = home

class PenMixin(Base):
    def __init__(self, pen, home):
        super(PenMixin, self).__init__(pen, home)
        self.pen = pen

class PenAndHome(PenMixin, HomeMixin):
    pass

inst = PenAndHome("pen", "home")
print inst.pen  # prints pen
print inst.home  # prints home