Django No module named 'src' when switching to another application

Made a separate application for user authorization. After authorization I want to send it to another application. I do it like this:

return reverse('/accountant'); 

or

 return reverse('/balance'); 

or

 return reverse('accountant:balance'); 

or

 return redirect("/accountant"); 

To which I get an error:

What am I doing wrong, and how to do it?

For accountant urls.py application:

 urlpatterns = [ url(r'^$', views.balance, name='balance'), url(r'^account/(?P<pk>[0-9]+)/$', views.account_edit, name='account_edit'), url(r'^category/(?P<pk>[0-9]+)/$', views.category_view, name='category_view'), ] 

for auth_page application:

 urlpatterns = [ url(r'', views.auth_page, name='auth_page'), ] 

for the whole site:

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

Switch to copy-and-paste view:

 Environment: Request Method: POST Request URL: http://127.0.0.1:8000/accountant Django Version: 1.9.8 Python Version: 3.5.0 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'accountant', 'auth_page'] Installed Middleware: ['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'] Traceback: File "D:\Program Files\Python\Python35-32\lib\site-packages\django\core\handlers\base.py" in get_response 149.response = self.process_exception_by_middleware(e, request) File "D:\Program Files\Python\Python35-32\lib\site-packages\django\core\handlers\base.py" in get_response 147. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "C:\Users\Rail\Documents\Django\Assistant\auth_page\views.py" in auth_page 25. return reverse("/accountant"); File "D:\Program Files\Python\Python35-32\lib\site-packages\django\core\urlresolvers.py" in reverse 600. return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))) File "D:\Program Files\Python\Python35-32\lib\site-packages\django\core\urlresolvers.py" in _reverse_with_prefix 508. (lookup_view_s, args, kwargs, len(patterns), patterns)) Exception Type: NoReverseMatch at /accountant Exception Value: Reverse for '/accountant' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: [] 

Fixed urls.py for the whole site and got:

 urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^accountant/', include('accountant.urls')), url(r'^$', include('auth_page.urls')), ]