gistfile1.txt

class ResponseMixin:
    @property
    def _base_result_dict():
        result_dict = {
            'res': 'Test'
        }
        return result_dict


class A(ResponseMixin, View):
    def post(self, request, *args, **kwargs):
        result_dict = self._base_result_dict
        return JsonResponse(result_dict)


class B(ResponseMixin, View):
    def post(self, request, *args, **kwargs):
        result_dict = self._base_result_dict
        res = result_dict.get("res")
        result_dict["res"] = self._logic(res)
        return JsonResponse(result_dict)