python3 manage.py runserver error

1
votes

When I try to start (python3 manage.py runserver) my django2.0 webapp on my PC I have this message:

Performing system checks...

Unhandled exception in thread started by .wrapper at 0x7fc889c36510> Traceback (most recent call last):

File "/home/neo/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 538, in url_patterns iter(patterns) TypeError: 'module' object is not iterable

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/home/neo/.local/lib/python3.5/site-packages/django/utils/autoreload.py", line 225, in wrapper fn(*args, **kwargs)

File "/home/neo/.local/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 120, in inner_run self.check(display_num_errors=True)

File "/home/neo/.local/lib/python3.5/site-packages/django/core/management/base.py", line 364, in check include_deployment_checks=include_deployment_checks,

File "/home/neo/.local/lib/python3.5/site-packages/django/core/management/base.py", line 351, in _run_checks return checks.run_checks(**kwargs)

File "/home/neo/.local/lib/python3.5/site-packages/django/core/checks/registry.py", line 73, in run_checks new_errors = check(app_configs=app_configs)

File "/home/neo/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 13, in check_url_config return check_resolver(resolver)

File "/home/neo/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 23, in check_resolver return check_method()

File "/home/neo/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 398, in check warnings.extend(check_resolver(pattern))

File "/home/neo/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 23, in check_resolver return check_method()

File "/home/neo/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 397, in check for pattern in self.url_patterns:

File "/home/neo/.local/lib/python3.5/site-packages/django/utils/functional.py", line 36, in get res = instance.dict[self.name] = self.func(instance)

File "/home/neo/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 545, in url_patterns raise ImproperlyConfigured(msg.format(name=self.urlconf_name)) django.core.exceptions.ImproperlyConfigured: The included URLconf '' does not appear to have any patterns in it. If you see valid patterns in the file then the issue is probably caused by a circular import.

my app's code :

(/django-examples/mysite):

(Setting.py)

INSTALLED_APPS = [
'webexample',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]

(urls.py)

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

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

(/django-examples/mysite/webexample):

(urls.py)

from django.urls import path
from . import views

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

(views.py)

from django.shortcuts import render
from django.http import HttpResponse

def index(request):
return HttpResponse("<h3>Hello, world!</h3>")

ubuntu 16.04 django 2.0.4 python 3.5 pip 8.1.1

What can be a reason of problem?

5
pythondjangopython-3.x
The code you have posted looks ok (apart from the indentation), and shouldn't cause that error. – Alasdair

5 Answers

0
votes

The order of INSTALLED_APPS is significant!

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    'webexample',
]
0
votes

To add your apps to settings.py in the main project folder, you need to write the following:

INSTALLED_APPS = [
    '*AppName*.apps.*Class*',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    ]

The AppName will be the name if your app, Class must be obtained from apps.py in your App folder. Here the AppName seems to be webexample, and the name of the only class in its apps.py will replace the class. I hope this will resolve your query.

0
votes

If you have rest framework or mysql, then you need to mention it in the installed apps. 

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'django_mysql',
]
0
votes

try changing urls.py

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

urlpatterns = [
path('admin/', admin.site.urls),
path('', include('webexample.urls')),
]
0
votes

Project urls.py should be changed like this:

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

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

View.py should be changed like this:

from django.shortcuts import render
from django.http import HttpResponse

def index(request):
    return HttpResponse("<h3>Hello, world!</h3>")