Dynamic Inheritance with python3

dinamic_inheritance.py

class DynamicInheritance(type):
    """
    Dinamicaly modify class with some extra mixins.
    """

    def __call__(cls, *args, **kwargs):
        _mixins = kwargs.pop("_mixins", None)
        if _mixins:
            assert isinstance(_mixins, tuple), "_mixin patemeter must be a tuple"

            new_cls = type(cls.__name__, _mixins + (cls,), {})
            return super(DynamicInheritance, new_cls).__call__(*args, **kwargs)

        return super(DynamicInheritance, cls).__call__(*args, **kwargs)


class MyMixin1(object):
    def test_method(self):
        print("mixin1")
        super().test_method()


class MyMixin2(object):
    def test_method(self):
        print("mixin2")
        super().test_method()


class Foo(object, metaclass=DynamicInheritance):
    def test_method(self):
        print("Main method")


foo_instance = Foo(_mixins=(MyMixin2, MyMixin1))
foo_instance.test_method()

# output:
#
# [3/5.0.0]{1}niwi@niwi:~/tmp> python3 dynamic_inheritance.py
# mixin2
# mixin1
# Main method