text: from django.shortcuts import render, get_object_or_404
  from .models import Post
  from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
  from django.views.generic import ListView
  
  class PostListView(ListView):
      queryset = Post.published.all()
      context_object_name = "posts"
      paginate_by = 3
      template_name = "blog/post/list.html"
  
  from .models import Post, Comment
  from .forms import EmailPostForm, CommentForm
  def post_detail(request, year, month, day, post):
      post = get_object_or_404(
          Post, slug=post,
          status="published",
          publish__year=year,
          publish__month=month,
          publish__day=day)
      comments = post.comments.filter(active=True)
      new_comment = None
      if request.method == "POST":
          comment_form = CommentForm(data=request.POST)
          if comment_form.is_valid():
              new_comment = comment_form.save(commit=False)
              new_comment.post = post
              new_comment.save()
      else:
          comment_form = CommentForm()
      return render(
          request,'blog/post/detail.html',
          {'post': post, 'comments': comments,
          'new_comment': new_comment, 'comment_form': comment_form})
  
  from .forms import EmailPostForm
  from django.core.mail import send_mail
  def post_share(request, post_id):
      post = get_object_or_404(Post, id=post_id, status="published")
      sent = False
      if request.method == 'POST':
          form = EmailPostForm(request.POST)
          if form.is_valid():
              cd = form.cleaned_data
              post_url = request.build_absolute_uri(
                  post.get_absolute_url()
              )
              subject = f"{cd['name']} recommends you read"\
                  f"{post.title}"
              message = f"Read {post.title} at {post_url}\n"\
                  f"{cd['name']}\`s comments: {cd['comments']}"
              send_mail(subject, message, 'admin@myblog.com',
              [cd['to']])
              sent = True
      else:
          form = EmailPostForm()
      return render(
          request, 'blog/post/share.html',
          {'post': post, 'form': form, 'sent': sent})
          
  
  from taggit.models import Tag
  def post_list(request, tag_slug=None):
      object_list = Post.published.all()
      tag = None
      if tag_slug:
          tag = get_object_or_404(Tag, slug=tag_slug)
          object_list = object_list.filter(tags__in=[tag])
      paginator = Paginator(object_list, 3)
      page = request.GET.get('page')
      try:
        posts = paginator.page(page)
      except PageNotAnInteger:
          posts = paginator.page(1)
      except EmptyPage:
          posts = paginator.page(paginator.num_pages)        
      return render(
          request, 'blog/post/list.html',
          {
          'page': page,
          'posts': posts,
          'tag': tag})