对比一下，CBVS和FBVS，哪个方便？

from django.shortcuts import renderfrom django.http import Http404from django.shortcuts import get_object_or_404from django.http import HttpResponse, HttpResponseRedirectfrom .models import Question, Choicefrom django.template import RequestContext, loaderfrom django.core.urlresolvers import reversefrom django.views import generic# Create your views here.def index(request):    latest_question_list = Question.objects.order_by('pub_date')[:5]    #template = loader.get_template('polls/index.html')    #context = RequestContext(request, {'latest_question_list': latest_question_list})    #output = ','.join([p.question_text for p in latest_question_list])    context = {
   'latest_question_list': latest_question_list}    return render(request, 'polls/index.html', context)def detail(request, question_id):    question = get_object_or_404(Question, pk=question_id)    '''    try:        question = Question.objects.get(pk=question_id)    except Question.DoesNotExist:        raise Http404("Question does not exist")    '''    return render(request, 'polls/detail.html', {
   'question': question})def results(request, question_id):    question = get_object_or_404(Question, pk=question_id)    return render(request, 'polls/results.html', {
   'question': question})def vote(request, question_id):    p = get_object_or_404(Question, pk=question_id)    try:        selected_choice = p.choice_set.get(pk=request.POST['choice'])    except(KeyError, Choice.DoesNotExist):        return render(request, 'polls/detail.html', {            'question': p,            'error_message': "You did not select a choice.",        })    else:        selected_choice.votes += 1        selected_choice.save()    return HttpResponseRedirect(reverse('polls:results', args=(p.id,)))class IndexView(generic.ListView):    template_name = 'polls/index.html'    context_object_name = 'latest_question_list'    def get_queryset(self):        return Question.objects.order_by('-pub_date')[:5]class DetailView(generic.DetailView):    model = Question    template_name = 'polls/detail.html'class ResultView(generic.DetailView):    model = Question    template_name = 'polls/results.html'