Django: od django.urls importuj odwrotnie; ImportError: Brak modułów o nazwach adresów URL

Question

Używam samouczka DjangoProject z aplikacją ankiet. Jako wychowawczy państw w części 4 próbuję zaimportować „odwrócić”: from django.urls import reverse ale otrzymuję błąd:

from django.urls import reverse ImportError: No module named urls

Zmieniłem ROOT_URLCONF po prostu „urls”, jednak nie działa.

Każda pomoc jest doceniana, dziękuję.

settings.py

import os 

# Build paths inside the project like this: os.path.join(BASE_DIR, ...) 
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) 


# Quick-start development settings - unsuitable for production 
# See https://docs.djangoproject.com/en/1.9/howto/deployment/checklist/ 

# SECURITY WARNING: keep the secret key used in production secret! 
SECRET_KEY = '3jyaq2i8aii-0m=fqm#7h&ri2+!7x3-x2t(yv1jutwa9kc)t!e' 

# SECURITY WARNING: don't run with debug turned on in production! 
DEBUG = True 

ALLOWED_HOSTS = [] 


# Application definition 

INSTALLED_APPS = [ 
    'polls.apps.PollsConfig', 
    'django.contrib.admin', 
    'django.contrib.auth', 
    'django.contrib.contenttypes', 
    'django.contrib.sessions', 
    'django.contrib.messages', 
    'django.contrib.staticfiles', 
] 

MIDDLEWARE_CLASSES = [ 
    'django.middleware.security.SecurityMiddleware', 
    'django.contrib.sessions.middleware.SessionMiddleware', 
    'django.middleware.common.CommonMiddleware', 
    'django.middleware.csrf.CsrfViewMiddleware', 
    'django.contrib.auth.middleware.AuthenticationMiddleware', 
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 
    'django.contrib.messages.middleware.MessageMiddleware', 
    'django.middleware.clickjacking.XFrameOptionsMiddleware', 
] 

ROOT_URLCONF = 'mysite.urls' 

TEMPLATES = [ 
    { 
     'BACKEND': 'django.template.backends.django.DjangoTemplates', 
     'DIRS': [], 
     'APP_DIRS': True, 
     'OPTIONS': { 
      'context_processors': [ 
       'django.template.context_processors.debug', 
       'django.template.context_processors.request', 
       'django.contrib.auth.context_processors.auth', 
       'django.contrib.messages.context_processors.messages', 
      ], 
     }, 
    }, 
] 

WSGI_APPLICATION = 'mysite.wsgi.application' 


# Database 
# https://docs.djangoproject.com/en/1.9/ref/settings/#databases 

DATABASES = { 
    'default': { 
     'ENGINE': 'django.db.backends.sqlite3', 
     'NAME': os.path.join(BASE_DIR, 'db.sqlite3'), 
    } 
} 


# Password validation 
# https://docs.djangoproject.com/en/1.9/ref/settings/#auth-password-validators 

AUTH_PASSWORD_VALIDATORS = [ 
    { 
     'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator', 
    }, 
    { 
     'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator', 
    }, 
    { 
     'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator', 
    }, 
    { 
     'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator', 
    }, 
] 


# Internationalization 
# https://docs.djangoproject.com/en/1.9/topics/i18n/ 

LANGUAGE_CODE = 'en-us' 

TIME_ZONE = 'UTC' 

USE_I18N = True 

USE_L10N = True 

USE_TZ = True 


# Static files (CSS, JavaScript, Images) 
# https://docs.djangoproject.com/en/1.9/howto/static-files/ 

STATIC_URL = '/static/' 

urls.py

from django.conf.urls import url, include 
from django.contrib import admin 

urlpatterns = [ 
    url(r'^admin/', admin.site.urls), 
    url(r'^polls/', include('polls.urls')), 

] 

polls/views.py

from django.http import HttpResponse, HttpResponseRedirect 
from .models import Question, Choice 
from django.shortcuts import get_object_or_404, render 
from django.urls import reverse 


def index(request): 
    latest_question_list = Question.objects.order_by('-pub_date')[:5] 
    context = { 
     'latest_question_list': latest_question_list, 
     } 
    return render(request, 'polls/index.html', context) 


def detail(request, question_id): 
    question = get_object_or_404(Question, pk=question_id) 
    return render(request, 'polls/results.html', {'question' : question}) 


def results(request, questioin_id): 
    response = "you are looking at the results of question %s" 
    return HttpResponse(response % question_id) 

def vote(request, question_id): 
    question = get_object_or_404(Question, pk=questioin_id) 
    try: 
     selected_choice = question.choice_set.get(pk=request.POST['choice']) 
    except (KeyError, Choice.DoesNotExist): 
     return render(request, 'polls/detail.html', {'question': question, 
                 'error_message': "you didnt select a choice", 
                 }) 
    else: 
     selected_choice.votes += 1 
     selected_choice.save() 
     return HttpResponseRedirect(reverse('polls:results', args= 
              (question.id,))) 

ankiety/urls.py

from django.conf.urls import url 
from . import views 

app_name = 'polls' 

urlpatterns = [ 
    url(r'^$', views.index, name='index'), 
    url(r'^(?P<question_id>[0-9]+)/$', views.detail, name='detail'), 
    url(r'^(?P<question_id>[0-9]+)/results/$', views.results, name='results'), 
    url(r'^(?P<question_id>[0-9]+)/vote/$', views.vote, name='vote'), 
] 

Answer 1

Jesteś na Django 1.9, należy zrobić:

from django.core.urlresolvers import reverse 

Począwszy od wersji 1.10 (w tym Django 2.0) jest gdzie będziemy robić from django.urls import reverse