python复杂多继承及super配合使用案例

class ContextMixin(object):
    def get_context_data(self, **kwargs):
        print('contextmixin')

class FormMixin(ContextMixin):
    def get_context_data(self, **kwargs):
        print('formmixin')
        super(FormMixin, self).get_context_data(**kwargs)

class SingleObjectMixin(ContextMixin):
    def get_context_data(self, **kwargs):
        print('singleobjectmixin')
        super(SingleObjectMixin, self).get_context_data(**kwargs)

class ModelFormMixin(FormMixin, SingleObjectMixin):
    pass

class View():
    pass

class ProcessFormView(View):
    def get(self):
        self.get_context_data()

class BaseUpdateView(ModelFormMixin, ProcessFormView):
    pass


bv = BaseUpdateView().get()
mro = BaseUpdateView.__mro__
for m in mro:
    print(m)

输出结果：

formmixin
singleobjectmixin
contextmixin
<class '__main__.BaseUpdateView'>
<class '__main__.ModelFormMixin'>
<class '__main__.FormMixin'>
<class '__main__.SingleObjectMixin'>
<class '__main__.ContextMixin'>
<class '__main__.ProcessFormView'>
<class '__main__.View'>
<class 'object'>