import inspect


class Napraw(object):

    def __init__(self, m, b):
        super().__init__()
        self.m = m
        self.b = b


class Tagi(object):
    m = None
    b = None

    def __init__(self):
        super().__init__()

    # tylko argumenty inne niż None będą przypisane do atrybutu obiektu
    def setup(self, m=None, b=None):
        args, _, _, _ = inspect.getargvalues(inspect.currentframe())
        for arg in args:
            if locals()[arg] is not None:
                setattr(self, arg, locals()[arg])

    @classmethod
    def with_args(cls, m, b):
        o = cls()
        o.setup(m, b)
        return o