title: If you see valid patterns in the file then the issue is probably caused by a circular import
body: <p>'C:\Users\huihuiqian\mys ite\posts\urls.py'>' does not appear to have any patterns in it. If you see valid patterns in the file then the issue is probably caused by a circular import.</p>
  
  <p>mysite.urls.py</p>
  
  <pre><code>from django.conf.urls import url, include
  from django.contrib import admin
  
  urlpatterns = [
      url(r'^admin/', admin.site.urls),
      url(r'^posts/', include('posts.urls')),
  ]
  </code></pre>
  
  <p>post.urls.py</p>
  
  <pre><code>from django.conf.urls import url
  from . import views
  urlpartterns =[
      url(r'^$',views.index, name='index')
  ];
  </code></pre>