django 　ブログ　エラー

エラーが起きて対処できません。
https://stackoverflow.com/questions/61406939/reverse-for-post-edit-with-arguments-not-found-1-patterns-triedサイトを参考にしようとしたのですが解決できませんでした。
解決方法を教えて下さい。お願い致します。

html
1{% load static %}
2
3<!DOCTYPE html>
4<html lang="ja">
5  <head>
6    <meta charset="UTF-8" />
7    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
8    <link
9      rel="stylesheet"
10      href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
11    />
12    <link rel="stylesheet" href="{% static 'css/style.css' %}" />
13    <title>ブログチュートリアル</title>
14  </head>
15
16  <body>
17    <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
18      <div class="container">
19        <a class="navbar-brand" href="/">ブログ</a>
20        <ul class="navbar-nav ml-auto">
21          <li class="nav-item">
22            <a class="nav-link" href="/">ホーム</a>
23          </li>
24          {% if user.is_authenticated %}
25          <li class="nav-item">
26            <a class="nav-link" href="{% url 'post_new' %}">投稿</a>
27          </li>
28          <li class="nav-item">
29            <a class="nav-link" href="">ログアウト</a>
30          </li>
31          {% else %}
32          <li class="nav-item">
33            <a class="nav-link" href="">サインアップ</a>
34          </li>
35          <li class="nav-item">
36            <a class="nav-link" href="">ログイン</a>
37          </li>
38          {% endif %}
39        </ul>
40      </div>
41    </nav>

pyhton
1from django.urls import path
2from app import views
3
4urlpatterns = [
5    path('', views.IndexView.as_view(), name='index'),
6    path('post/<int:pk>/', views.PostDetailView.as_view(), name='post_detail'),
7    path('post/nwe/', views.CreatePostlView.as_view(), name='post_new'),
8    path('post/<int:pk>/edit/', views.PostEditView.as_view(), name='post_edit'),
9]
10

python
1from django.http.request import RawPostDataException
2from django.shortcuts import render, redirect
3from django.views.generic import View
4from .models import Post
5from .forms import PostForm
6from django.contrib.auth.mixins import LoginRequiredMixin
7class IndexView(View):
8    def get(self, request , *args, **kwargs):
9        post_data=Post.objects.order_by('-id')
10        return render(request , 'app/index.html',{
11            'post_data': post_data
12        })
13    
14class PostDetailView(View):
15    def get(self, request, *args, **kwargs):
16        post_data=Post.objects.get(id = self.kwargs['pk'])
17        return render(request, 'app/post_detail.html', {
18            'post_data':post_data
19        })
20
21class CreatePostlView(LoginRequiredMixin,View):
22    def get(self, request, *args, **kwargs):
23        form=PostForm(request.POST or None)
24        return render(request, 'app/post_form.html',{
25            'form':form
26        })
27
28    def post(self, request, *args, **kwargs):
29        form=PostForm(request.POST or None)
30
31        if form.is_valid():
32            post_data=Post()
33            post_data.author=request.user
34            post_data.title=form.cleaned_data['title']
35            post_data.content=form.cleaned_data['content']
36            post_data.save()
37            return redirect('post_detail' , post_data.id)
38
39        return render(request, 'app/post_form.html',{
40            'form': form
41        })  
42
43class PostEditView(LoginRequiredMixin,View):
44    def get(self, request, *args, **kwargs):
45        post_data=Post.objects.get(id=self.kwargs['pk'])
46        form=PostForm(
47            request.POST or None,
48            initial={
49                'title': post_data.title,
50                'content': post_data.content
51            }
52        )
53
54        return render(request, 'app/post_form.html',{
55            'form':form
56        })
57
58    def post(self, request, *args, **kwargs):
59        form=PostForm(request.POST or None)
60
61        if form.is_valid():
62            post_data=Post.objects.get(id=self.kwargs['pk'])
63            post_data.title=form.cleaned_data['title']
64            post_data.content=form.cleaned_data['content']
65            post_data.save()
66            return redirect('post_detail' , self.kwargs['pk'])
67
68        return render(request, 'app/post_form.html',{
69            'form': form
70        })  
71