如何使用 python 中的子 class 的方法调用第三个或更高的父 class 的方法？

Question

I am trying to develop a RESTful API by means of Django RestFramework. I need to call the validation method (say method a) of a class (say RawUser) in subclasses. For the first two levels "super()" can help, but I do not know the solution for the deeper levels. This is my sample code:

class RawUser:
    def a(self):
        return 'something'


class AnonymousUser(RawUser):
    def a(self):
        return super().a()


class RegisteredUser(AnonymousUser):
    def a(self):
        return super(AnonymousUser, self).a()


class VIPUser(RegisteredUser):
    def a(self):
        # How can I call method "a" of RawUser here?


class SpecialUser(VIPUser):
    def a(self):
        # How can I call method "a" of RawUser here?


class AdminUser(SpecialUser):
    def a(self):
        # How can I call method "a" of RawUser here?

I need to call the method "a" of RawUser in deep subclasses for example AdminUser. How can I do this?

Answer 1

RawUser.a(instance)

When you call instance.method() you are actually calling Class.method(instance), the self is actually an argument.

Answer 2

You can do the same thing you already do in RegisteredUser .

Just use super(AnonymousUser, self).a() in every class except AnonymousUser and RawUser. This will only call RawUser and the class you're in. I've tested it here