/Users/simley/Desktop/learning_log/ll_env/bin/python /Users/simley/Desktop/learning_log/manage.py runserver 8000
Performing system checks...

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x1073f31e0>
Traceback (most recent call last):
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 120, in inner_run
    self.check(display_num_errors=True)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/core/management/base.py", line 364, in check
    include_deployment_checks=include_deployment_checks,
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/core/management/base.py", line 351, in _run_checks
    return checks.run_checks(**kwargs)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/core/checks/registry.py", line 73, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/core/checks/urls.py", line 40, in check_url_namespaces_unique
    all_namespaces = _load_all_namespaces(resolver)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/core/checks/urls.py", line 57, in _load_all_namespaces
    url_patterns = getattr(resolver, 'url_patterns', [])
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/urls/resolvers.py", line 536, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/urls/resolvers.py", line 529, in urlconf_module
    return import_module(self.urlconf_name)
  File "/Users/simley/anaconda3/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/simley/Desktop/learning_log/learning_log/urls.py", line 23, in <module>
    url(r'', include('learning_logs.urls', namespace='learning_logs')),
  File "/Users/simley/Desktop/learning_log/ll_env/lib/python3.6/site-packages/django/urls/conf.py", line 39, in include
    'Specifying a namespace in include() without providing an app_name '
django.core.exceptions.ImproperlyConfigured: Specifying a namespace in include() without providing an app_name is not supported. Set the app_name attribute in the included module, or pass a 2-tuple containing the list of patterns and app_name instead.

Process finished with exit code 0
 

這是Django2.0版本的問題

解決辦法一：

                  將Django降到1.11

解決辦法二：

url(r'^admin/', include(admin.site.urls)),
url(r'', include('learning_logs.urls', namespace='learning_logs'))

改成：

url(r'^admin/', admin.site.urls),
url(r'', include(('learning_logs.urls', 'learning_logs'), namespace='learning_logs')),
 

或：

path('admin/', admin.site.urls),
path('', include(('learning_logs.urls', 'learning_logs'), namespace='learning_logs')),