ClassName（object）中的super（ClassName，self）是做什麼用的？ （在Django文檔使用）

Question

下面的代碼是從字面上Django documentation about forms in class-based views：

import json 

from django.http import HttpResponse 
from django.views.generic.edit import CreateView 

class AjaxableResponseMixin(object): 
    """ 
    Mixin to add AJAX support to a form. 
    Must be used with an object-based FormView (e.g. CreateView) 
    """ 
    def render_to_json_response(self, context, **response_kwargs): 
     data = json.dumps(context) 
     response_kwargs['content_type'] = 'application/json' 
     return HttpResponse(data, **response_kwargs) 

    def form_invalid(self, form): 
     if self.request.is_ajax(): 
      return self.render_to_json_response(form.errors, status=400) 
     else: 
      return super(AjaxableResponseMixin, self).form_invalid(form) 

    def form_valid(self, form): 
     if self.request.is_ajax(): 
      data = { 
       'pk': form.instance.pk, 
      } 
      return self.render_to_json_response(data) 
     else: 
      return super(AjaxableResponseMixin, self).form_valid(form) 

class AuthorCreate(AjaxableResponseMixin, CreateView): 
    model = Author 

我不明白的代碼是super(AjaxableResponseMixin, self)。我知道super(ChildClass, self)用於在子類的代碼中調用父類的方法。但是AjaxableResponseMixin沒有任何父母！這是做什麼的？

Answer 1

在AuthorCreate，AjaxableResponseMixin的超級類將是CreateView：

>>> class a(object): pass 
... 
>>> class b(object): pass 
... 
>>> class c(a,b): pass 
... 
>>> c.mro() 
[<class '__main__.c'>, <class '__main__.a'>, <class '__main__.b'>, <type 'object'>] 

mro()是 「方法解析順序」，這super指的順序。