class Person(object):
    """ Init Person with ordering values or keys values"""
    _attrs = ["name", "firstname", "email", "address"]
    _ops_attrs = ["age", "size"]

    def __init__(self, *args, **kwargs):
        if len(args):
            kw = dict(map(None, list(self._attrs + self._ops_attrs ), args))
            kwargs = dict((k, v) for (k, v) in kw.iteritems() if v is not None)
            super(Person, self).__init__()
        for k, v in kwargs.items():
            setattr(self, k, v)
        self._parameters = kwargs

p = Person("Jean", "Marc", address="Paris", email="jm@mail.com")
p = Person("Jean", "Marc", "jm@mail.com", "Paris")
d = ("Jean", "Marc", "jm@mail.com", "Paris")
p = Person(*d)
d = (name="Jean", "Marc", "jm@mail.com", "Paris")
p = Person(**d)

pc_kw = dict((k, v) for (k, v) in kw.iteritems() if k is PersonCar._attrs)
pc = PersonCar(**pc_kw)