While going through the django tutorial i stuck while writing a code i.e., automated test.And error is showing with some tracebacks.I tried to resolve the error but i failed.Please help me to resolve the error.The exceptions and code is given below.

[Avitab Ayan Sarmah]

Exceptions:

Type "help", "copyright", "credits" or "license" for more information.
>>> import datetime
>>> from django.utils import timezone
>>> from polls.models import Question
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\AVITABAYAN\mysite\polls\models.py", line 7, in <module>
    class Question(models.Model):
  File "c:\python36\lib\site-packages\django\db\models\base.py", line 100, 
in __new__
    app_config = apps.get_containing_app_config(module)
  File "c:\python36\lib\site-packages\django\apps\registry.py", line 244, 
in get_containing_app_config
    self.check_apps_ready()
  File "c:\python36\lib\site-packages\django\apps\registry.py", line 127, 
in check_apps_ready
    raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.

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