While going through the django tutorial i found error while scripting automated testing.The code and exeptions are mentioned below. Please find what is the error .

[Avitab Ayan Sarmah]

 shell:

>>> import datetime
>>> from django.utils import timezone
>>> from polls.models import Question
>>> # create a Question instance with pub_date 30 days in the future
>>> future_question = Question(pub_date=timezone.now() + datetime.timedelta(days=30))
>>> # was it published recently?
>>> future_question.was_published_recently()
True

Exceptions:

PS C:\Users\AVITABAYAN\mysite> python
Python 3.6.2 (v3.6.2:5fd33b5, Jul  8 2017, 04:57:36) [MSC v.1900 64 bit (AMD64)] on win32
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.

models.py:

import datetime

from django.db import models
from django.utils import timezone


class Question(models.Model):
    #...
    def was_published_recently(self):
        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)
    def __str__(self):
        return self.question_text
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

class Choice(models.Model):
    #...
    def __str__(self):
        return self.choice_text
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

[James Farris]

Instead of giving the answer, I suggest looking at the Traceback section you posted below because the answer is there. Giving you the answer will not help your trouble shooting skills. 

Sent from my mobile device

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[Daniel Hepper]

I kind of agree with James, but I think a) that the exception message is not really self-explanatory and b) the instructions in the tutorial at this point are somewhat unclear.

You started a plain Python shell with the command "python". You should have used "python manage.py shell" instead, as was introduced in Part 2 of the tutorial:

Now, let’s hop into the interactive Python shell and play around with the free API Django gives you. To invoke the Python shell, use this command:

 

$ python manage.py shell

 

We’re using this instead of simply typing “python”, because manage.py sets the DJANGO_SETTINGS_MODULE environment variable, which gives Django the Python import path to your mysite/settings.py file.

See https://docs.djangoproject.com/en/2.0/intro/tutorial02/#playing-with-the-api

Hope that helps,

Daniel 

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