from django.conf.urls import url

from sell import views


urlpatterns = [
    url(r'^$', views.index, name='index'),
    url(r'^personal/$', views.personal_data),
    url(r'^books/$', views.books),
    url(r'^summary/$', views.summary),
]
@@ -98,22 +98,8 @@
 ndex
-, name='index'
 ),%0A 

Remove unnecessary URL name in Sell app