Using the URLconf defined in polls.urls, Django tried these URL patterns, in this order

[Bugs Bunny]

Greetings django team, I'm a newbie with this framework but I have experience with python, I did the first tutorial and it throws me a 404 error, I saw that in the previous versions we used a r'formated 'string and indicated the beginning ^ and the end $ but in version 2.1 is no longer used, check and I do not know where the error comes from, I will leave some captures, the IRC room is down I hope answers from this wonderful community

tuto/urls.py

 from django.contrib import admin
 from django.urls import include, path

 urlpatterns = [
     path('polls/', include('polls.urls')),
     path('admin/', admin.site.urls),
 ]

polls/urls.py

from django.urls import path
from . import views

urlpatterns = [
     path(' ', views.index, name='index'),
 ]

polls/views.py

from django.shortcuts import render
from django.http import HttpResponse as HR
# Create your views here.

def index(request):
       return HR("hola estas en el index de polls")
 

mi internet its very laggy

[Manjunath]

I think you have a space in your url path.

replace path(' ', views.index, name='index') with path('', views.index, name='index') in your polls/urls.py and check the result.

[Motaz Hejaze]

first , no spaces are allowed in URLS
as  Manjunath said

replace path(' ', views.index, name='index') with path('', views.index, name='index') in your polls/urls.py and check the result.

second , run the server 
python manage.py runserver 

third check the url
go to http://127.0.0.1:8000/polls

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[Bugs Bunny]

Regards for the answers this is my input

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[Manjunath]

Your project urls are set to address starting with admin & polls.

You can browse localhost:8000/polls/

[Bugs Bunny]

i use this and work, thanks (y) 

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[Manjunath]

You are welcome.

I suggest you go through the documentation & guide carefully and work accordingly..

I learned the same way!!