mro

mro.py

from collections import ChainMap


class Bar(object):
    y = 1


class Foo(Bar):
    a = 1
    b = 2
    c = 3
    foo = 1
    bar = 2
    template = "{a} {b} {c} {y}"

    def crawl(self):
        return ChainMap(self.__dict__, *(x.__dict__ for x in type(self).mro()))

    def hello(self):
        return self.template.format(**self.crawl())


x = Foo()
print(x.hello())