python - Page not found in Django -

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i'm following this tutorial learn django. i'm total starter. urls.py file has following code

from django.conf.urls import include, url django.contrib import admin . import views  urlpatterns = [     url(r'^$', views.index, name='index'),     url(r'^polls/', include('polls.urls')),     url(r'^admin/', include(admin.site.urls)),   ]

my views.py file is

from django.shortcuts import render  def index(request):  return httpresponse("hello, world. you're @ polls index.")

when try access th url http://127.0.0.1:8000/polls/ in system gives page not found message. doing wrong? problem version difference?

here screenshot of error enter image description here

this error comes if urls.py file in polls directory not have pattern. create file urls.py polls directory , add following url pattern

from django.conf.urls import patterns, url polls import views  urlpatterns = patterns('', # ex: /polls/ url(r'^$', views.index, name='index'), )

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