def trace(func):
    name = func.__qualname__
    def newfunc(*args):
        print("%s%s called" % (name, args))
        result = func(*args)
        print("%s returns %s" % (name, repr(result)))
        return result
    return newfunc


class base(object):
    @trace
    def __init__(self, *args):
        super(base, self).__init__()


class i1(base):
    @trace
    def __init__(self, *args):
        super(i1, self).__init__("arg from i1")


class i2(base):
    @trace
    def __init__(self, *args):
        super(i2, self).__init__("arg from i2")


class top(i1, i2):
    @trace
    def __init__(self):
        super(top, self).__init__("arg from top")

x = top()