Django: NoReverseMatch at /を解決したい

Question

###前提・実現したいこと
こちらを参考にDjangoをつかってブログを作ろうとしています。名前からも察する通りマッチしたページが無いとのことなのですが、具体的に何が原因でこのようなエラーに至っているのか。そして具体的な解決策が思いつかないまま数時間が経ってしまったので質問させて頂きました。

###発生している問題・エラーメッセージ

[22/Jan/2017 09:23:54] "GET /14 HTTP/1.1" 404 2239
Internal Server Error: /
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/exception.py", line 39, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 249, in _legacy_get_response
    response = self._get_response(request)
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/hironorisama/Projects/github/ryugaku_otaku/blog/views.py", line 8, in post_list
    return render(request, 'blog/post_list.html', {'posts': posts})
  File "/usr/local/lib/python3.5/site-packages/django/shortcuts.py", line 30, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "/usr/local/lib/python3.5/site-packages/django/template/loader.py", line 68, in render_to_string
    return template.render(context, request)
  File "/usr/local/lib/python3.5/site-packages/django/template/backends/django.py", line 66, in render
    return self.template.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 208, in render
    return self._render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 199, in _render
    return self.nodelist.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 994, in render
    bit = node.render_annotated(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated
    return self.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/loader_tags.py", line 174, in render
    return compiled_parent._render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 199, in _render
    return self.nodelist.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 994, in render
    bit = node.render_annotated(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated
    return self.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/loader_tags.py", line 70, in render
    result = block.nodelist.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 994, in render
    bit = node.render_annotated(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated
    return self.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/defaulttags.py", line 209, in render
    nodelist.append(node.render_annotated(context))
  File "/usr/local/lib/python3.5/site-packages/django/template/base.py", line 961, in render_annotated
    return self.render(context)
  File "/usr/local/lib/python3.5/site-packages/django/template/defaulttags.py", line 439, in render
    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
  File "/usr/local/lib/python3.5/site-packages/django/urls/base.py", line 91, in reverse
    return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))
  File "/usr/local/lib/python3.5/site-packages/django/urls/resolvers.py", line 392, in _reverse_with_prefix
    (lookup_view_s, args, kwargs, len(patterns), patterns)
django.urls.exceptions.NoReverseMatch: Reverse for 'blog.views.post_detail' with arguments '()' and keyword arguments '{'pk':not found. 0 pattern(s) tried: []

###該当のソースコード

    <!-- post_list.html -->
{% extends 'blog/base.html' %}

{% block content %}
    {% for post in posts %}
        <div class="post">
            <div class="date">
                {{ post.published_date }}
            </div>
            <h1><a href="{% url 'blog.views.post_detail' pk=post.pk %}">{{ post.title }}</a></h1>
            <p>{{ post.text|linebreaks }}</p>
        </div>
    {% endfor %}
{% endblock content %}

    <!-- post_detail.html -->
{% extends 'blog/base.html' %}

{% block content %}
    <div class="post">
        {% if post.published_date %}
            <div class="date">
                {{ post.published_date }}
            </div>
        {% endif %}
        <h1>{{ post.title }}</h1>
        <p>{{ post.text|linebreaks }}</p>
    </div>
{% endblock %}

# views.py
from django.shortcuts import render
from django.shortcuts import render, get_object_or_404
from django.utils import timezone
from .models import Post

def post_list(request):
    posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
    return render(request, 'blog/post_list.html', {'posts': posts})

def post_detail(request, pk):
    post = get_object_or_404(Post, pk=pk)
    return render(request, 'blog/post_detail.html', {'post': post})

#urls.py
from django.conf.urls import include, url
from . import views

urlpatterns = [
    url(r'^$', views.post_list),
    url(r'^post/(?P<pk>[0-9]+)/$', views.post_detail),
]

        <!-- base.html -->
{% load staticfiles %}
<html>
    <head>
        <title>RYUOTA</title>
        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
        <link href='//fonts.googleapis.com/css?family=Lobster&subset=latin,latin-ext' rel='stylesheet' type='text/css'>
        <link rel="stylesheet" href="{% static 'css/blog.css' %}">
    </head>
    <body>
        <div class="page-header">
            <h1>
                {% load static %}
                <img src="{% static "images/ryuota-logo.png" %}" alt="My image"/>
            </h1>
        </div>

        <div class="content container">
            <div class="row">
                <div class="col-md-8">
                {% block content %}
                {% endblock %} 
                </div>
            </div>
        </div>
    </body>
</html>

###試したこと
参考にしているサイトを参考にしながら誤りがないかもう一度やり直してみる。
<a href="{% url 'blog.views.post_detail' pk=post.pk %}">{{ post.title }}</a>を取り除くと正常にページが表示されることからblog.views.post_detail関数にマッチしたページが無いためにエラーが起きているものだと思われる。

###補足情報(言語/FW/ツール等のバージョンなど)
python 3.5.2

$ pip list
appnope (0.1.0)
beautifulsoup4 (4.5.1)
bleach (1.5.0)
chardet (2.3.0)
cssselect (1.0.0)
decorator (4.0.11)
dj-database-url (0.4.1)
dj-static (0.0.6)
Django (1.10.4)
django-contrib-comments (1.7.3)
django-toolbelt (0.0.1)
filebrowser-safe (0.4.6)
future (0.16.0)
grappelli-safe (0.4.5)
gunicorn (19.6.0)
html5lib (0.9999999)
ipython (5.1.0)
ipython-genutils (0.1.0)
lxml (3.7.1)
Mezzanine (4.2.2)
oauthlib (2.0.1)
olefile (0.44)
pexpect (4.2.1)
pickleshare (0.7.4)
Pillow (4.0.0)
pip (9.0.1)
prompt-toolkit (1.0.9)
psycopg2 (2.6.2)
ptyprocess (0.5.1)
Pygments (2.1.3)
PyMySQL (0.7.9)
pytz (2016.10)
requests (2.12.3)
requests-oauthlib (0.7.0)
selenium (3.0.2)
setuptools (25.2.0)
simplegeneric (0.8.1)
six (1.10.0)
slackbot (0.4.1)
slacker (0.9.30)
static3 (0.7.0)
traitlets (4.3.1)
tzlocal (1.3)
wcwidth (0.1.7)
websocket-client (0.40.0)
wheel (0.29.0)
whitenoise (3.2.2)

Answer 1

urlタグで指定するべき値が間違っているのが原因だと思います。

参考サイトのDjangoバージョン: 1.6.4 ここから確認
hiro_weedslayerさんのDjangoバージョン: 1.10.4

Django1.10.x系におけるurlタグについてのドキュメントには、「呼び出す関数」ではなく**「urls記述時に指定されたname」**を呼ぶように書かれています。
※Django1.8のタイミングで挙動が変わったぽいです。

• urls.py: nameを付与
• post_list.html: 関数の代わりに上で付与したnameを指定

で動くと思うので、試してみてください。