Django, url configuration reverse question. Gives ImproperConfigured - django

Question

I tried to use this 2 lines to check if url reverse works...:
from django.urls import reverse
reverse('country-autocomplete')
It suppose to give me:
u'/country-autocomplete/'
I did this earlier and it worked perfectly, since I had couple of problems and did couple of changes in environment(?).
Now I'm trying to run these commands in cmd->python with swthed on environment and it gives me this fault:
>>> from django.urls import reverse
>>> reverse('raildict-autocomplete')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\me\Envs\sc_project\lib\site-packages\django\urls\base.py", line 31, in reverse
resolver = get_resolver(urlconf)
File "C:\Users\me\Envs\sc_project\lib\site-packages\django\urls\resolvers.py", line 69, in get_resolver
urlconf = settings.ROOT_URLCONF
File "C:\Users\me\Envs\sc_project\lib\site-packages\django\conf\__init__.py", line 76, in __getattr__
self._setup(name)
File "C:\Users\me\Envs\sc_project\lib\site-packages\django\conf\__init__.py", line 57, in _setup
raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: Requested setting ROOT_URLCONF, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.
What have I done to break it, and probably the most important how to fix it? Thank you!

Answer 1

def get_absolute_url(self):
return reverse('src:post')
Was having this kind of error it tired this and my error solved
This provides default revers after a operations performed
or you are reversing to path that is having an issue or that doesn't exist.
or use reverse_lazy.

Answer 2

That is kind of dumb...
I fired up: 'python' from cmd
and then:
>>>from django.urls import reverse
>>>reverse('sch-autocomplete')
But, it is not supposed to be done that way and sure it gave me the fault message. Oh! I was so sad! But it is only my mistake, thanks goodness... Environment is good, paths are good and etc. Just have to do it right way:
python manage.py shell
>>>from django.urls import reverse
>>>reverse('sch-autocomplete')
And after it gave me right reverse path. I will leave it here... Because I saw very in deep, complicated answers on: Requested setting ROOT_URLCONF, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.
But the problem in my code was on the suface and only because I did wrong coding in cmd. May be it helps to somebody and saves the time...