post list view not found NoReverseMatch

Hi All.

And this my view page if any bug please tell me.

from django.shortcuts import render, get_object_or_404, redirect

from django.contrib.auth.decorators import login_required

from blog.models import Post, Comment

from django.utils import timezone

from blog.forms import PostForm, CommentForm

from django.views.generic import (TemplateView,ListView,

                                  DetailView,CreateView,

                                  UpdateView,DeleteView)

from django.urls import reverse_lazy

from django.contrib.auth.mixins import LoginRequiredMixin

class AboutView(TemplateView):

    template_name = 'about.html'

class PostListView(ListView):

    model = Post

    def get_queryset(self):

        return Post.objects.filter(published_date__lte=timezone.now()).order_by('-published_date')

class PostDetailView(DetailView):

    model = Post

class CreatePostView(LoginRequiredMixin,CreateView):

    login_url = '/login/'

    redirect_field_name = 'blog/post_detail.html'

    form_class = PostForm

    model = Post

class PostUpdateView(LoginRequiredMixin,UpdateView):

    login_url = '/login/'

    redirect_field_name = 'blog/post_detail.html'

    form_class = PostForm

    model = Post

class DraftListView(LoginRequiredMixin,ListView):

    login_url = '/login/'

    redirect_field_name = 'blog/post_draft_list.html'

    model = Post

    def get_queryset(self):

        return Post.objects.filter(published_date__isnull=True).order_by('created_date')

class PostDeleteView(LoginRequiredMixin,DeleteView):

    model = Post

    success_url = reverse_lazy('post_list')

#######################################

## Functions that require a pk match ##

#######################################

@login_required

def post_publish(request, pk):

    post = get_object_or_404(Post, pk=pk)

    post.publish()

    return redirect('post_detail', pk=pk)

@login_required

def add_comment_to_post(request, pk):

    post = get_object_or_404(Post, pk=pk)

    if request.method == "POST":

        form = CommentForm(request.POST)

        if form.is_valid():

            comment = form.save(commit=False)

            comment.post = post

            comment.save()

            return redirect('post_detail', pk=post.pk)

    else:

        form = CommentForm()

    return render(request, 'blog/comment_form.html', {'form': form})

@login_required

def comment_approve(request, pk):

    comment = get_object_or_404(Comment, pk=pk)

    comment.approve()

    return redirect('post_detail', pk=comment.post.pk)

@login_required

def comment_remove(request, pk):

    comment = get_object_or_404(Comment, pk=pk)

    post_pk = comment.post.pk

    comment.delete()

    return redirect('post_detail', pk=post_pk)

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