old_contents: """hiren URL Configuration
  
  The `urlpatterns` list routes URLs to views. For more information please see:
      https://docs.djangoproject.com/en/1.8/topics/http/urls/
  Examples:
  Function views
      1. Add an import:  from my_app import views
      2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
  Class-based views
      1. Add an import:  from other_app.views import Home
      2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
  Including another URLconf
      1. Add an import:  from blog import urls as blog_urls
      2. Add a URL to urlpatterns:  url(r'^blog/', include(blog_urls))
  """
  from django.conf.urls import url
  from book import views
  from django.conf.urls.static import static
  from django.conf import settings
  
  urlpatterns = [
      url(r'^$', views.index),
      url(r'^login/$', views.login),
      url(r"^logout$", views.logout),
      url(r"^dashboard/$", views.dashboard),
      url(r"^add/$", views.add_book),
      url(r"^book/(?P<slug>[^\.]+)/", views.book),
  
  ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
  
new_contents: """hiren URL Configuration
  
  The `urlpatterns` list routes URLs to views. For more information please see:
      https://docs.djangoproject.com/en/1.8/topics/http/urls/
  Examples:
  Function views
      1. Add an import:  from my_app import views
      2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
  Class-based views
      1. Add an import:  from other_app.views import Home
      2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
  Including another URLconf
      1. Add an import:  from blog import urls as blog_urls
      2. Add a URL to urlpatterns:  url(r'^blog/', include(blog_urls))
  """
  from django.conf.urls import url
  from book import views
  from django.conf.urls.static import static
  from django.conf import settings
  
  urlpatterns = [
      url(r'^$', views.index),
      url(r'^login/$', views.login),
      url(r"^logout$", views.logout),
      url(r"^dashboard/$", views.dashboard),
      url(r"^add/$", views.add_book),
      url(r"^book/(?P<slug>[^\.]+)", views.book),
  
  ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
  
subject: fix form error