title: raise AppRegistryNotReady("Apps aren't loaded yet.") django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet..how to load the apps?
body: <p><a href="https://i.stack.imgur.com/g89q0.jpg" rel="nofollow noreferrer">enter image description here</a>i was trying to run the following command::</p>
  
  <pre><code>python populate_book.py
  </code></pre>
  
  <p>and stuck with this error:: </p>
  
  <pre><code>raise AppRegistryNotReady("Apps aren't loaded yet.")
  django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.
  </code></pre>
  
  <p>The Whole Traceback is as follow::</p>
  
  <pre><code>Traceback (most recent call last):
    File "populate_book.py", line 6, in &lt;module&gt;
      from opac.models import Book, BookCopy
    File "/home/prashant/Desktop/po/opac/models.py", line 6, in &lt;module&gt;
      from transactions.models import EndUser
    File "/home/prashant/Desktop/po/transactions/models.py", line 4, in &lt;module&gt;
      class EndUser(models.Model):
    File "/home/prashant/Desktop/po/local/lib/python2.7/site-packages/django/db/models/base.py", line 110, in __new__
      app_config = apps.get_containing_app_config(module)
    File "/home/prashant/Desktop/po/local/lib/python2.7/site-packages/django/apps/registry.py", line 247, in get_containing_app_config
      self.check_apps_ready()
    File "/home/prashant/Desktop/po/local/lib/python2.7/site-packages/django/apps/registry.py", line 125, in check_apps_ready
      raise AppRegistryNotReady("Apps aren't loaded yet.")
  django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.
  </code></pre>
  
  <p>settings.py:: </p>
  
  <pre><code>    # Django settings for cope project.
  import os
  DEBUG = True
  TEMPLATE_DEBUG = DEBUG
  PROJECT_PATH = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
  
  ADMINS = (
      ('pulkit', 'data.pulkit@gmail.com'),
      ('shashank', 'shashankgrovy@gmail.com'),
      ('sourabh', 'sourabh.coder@gmail.com'),
      ('utsav', 'kumaruts@gmail.com'),
  )
  
  MANAGERS = ADMINS
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
           # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
          'NAME': 'cope.db',
          # Or path to database file if using sqlite3.
          # The following settings are not used with sqlite3:
          'USER': '',
          'PASSWORD': '',
          'HOST': '127.0.0.1',
          # Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP.
          'PORT': '3306',
          # Set to empty string for default.
      }
  }
  
  # Hosts/domain names that are valid for this site; required if DEBUG is False
  # See https://docs.djangoproject.com/en/1.5/ref/settings/#allowed-hosts
  ALLOWED_HOSTS = []
  
  # Local time zone for this installation. Choices can be found here:
  # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
  # although not all choices may be available on all operating systems.
  # In a Windows environment this must be set to your system time zone.
  TIME_ZONE = 'Asia/Kolkata'
  
  # Language code for this installation. All choices can be found here:
  # http://www.i18nguy.com/unicode/language-identifiers.html
  LANGUAGE_CODE = 'en-us'
  
  SITE_ID = 1
  
  # If you set this to False, Django will make some optimizations so as not
  # to load the internationalization machinery.
  USE_I18N = True
  
  # If you set this to False, Django will not format dates, numbers and
  # calendars according to the current locale.
  USE_L10N = True
  
  # If you set this to False, Django will not use timezone-aware datetimes.
  USE_TZ = True
  
  # Absolute filesystem path to the directory that will hold user-uploaded files.
  # Example: "/var/www/example.com/media/"
  
  MEDIA_ROOT = ''
  
  # URL that handles the media served from MEDIA_ROOT. Make sure to use a
  # trailing slash.
  # Examples: "http://example.com/media/", "http://media.example.com/"
  
  MEDIA_URL = ''
  
  # Absolute path to the directory static files should be collected to.
  # Don't put anything in this directory yourself; store your static files
  # in apps' "static/" subdirectories and in STATICFILES_DIRS.
  # Example: "/var/www/example.com/static/"
  STATIC_ROOT = ''
  
  # URL prefix for static files.
  # Example: "http://example.com/static/", "http://static.example.com/"
  STATIC_URL = '/static/'
  
  # Additional locations of static files
  STATICFILES_DIRS = (
      os.path.join(os.path.join(PROJECT_PATH, 'cope'), 'static'),
  )
  
  # List of finder classes that know how to find static files in
  # various locations.
  STATICFILES_FINDERS = (
      'django.contrib.staticfiles.finders.AppDirectoriesFinder',
      'django.contrib.staticfiles.finders.FileSystemFinder',
      # 'django.contrib.staticfiles.finders.DefaultStorageFinder',
  )
  
  # Make this unique, and don't share it with anybody.
  SECRET_KEY = 'li=xy2zchjmi=)$+t$*yi5soc77yankx#=au+5&amp;fy17_j3-#e%'
  
  # List of callables that know how to import templates from various sources.
  TEMPLATE_LOADERS = (
      'django.template.loaders.filesystem.Loader',
      'django.template.loaders.app_directories.Loader',
      # 'django.template.loaders.eggs.Loader',
  )
  
  MIDDLEWARE_CLASSES = (
      'django.middleware.common.CommonMiddleware',
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.csrf.CsrfViewMiddleware',
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      # Uncomment the next line for simple clickjacking protection:
      # 'django.middleware.clickjacking.XFrameOptionsMiddleware',
  )
  
  ROOT_URLCONF = 'cope.urls'
  
  # Python dotted path to the WSGI application used by Django's runserver.
  WSGI_APPLICATION = 'cope.wsgi.application'
  
  TEMPLATE_DIRS = (
      os.path.join(os.path.join(PROJECT_PATH, 'cope'), 'templates'),
  )
  
  DJANGO_APPS = (
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'django.contrib.admin',
  )
  
  LOCAL_APPS = (
      'opac',
      'transactions',
  )
  
  THIRD_PARTY_APPS = (
      'bootstrap_admin',
  )
  
  INSTALLED_APPS = THIRD_PARTY_APPS + LOCAL_APPS + DJANGO_APPS
  
  # A sample logging configuration. The only tangible logging
  # performed by this configuration is to send an email to
  # the site admins on every HTTP 500 error when DEBUG=False.
  # See http://docs.djangoproject.com/en/dev/topics/logging for
  # more details on how to customize your logging configuration.
  
  LOGGING = {
      'version': 1,
      'disable_existing_loggers': False,
      'filters': {
          'require_debug_false': {
              '()': 'django.utils.log.RequireDebugFalse'
          }
      },
      'handlers': {
          'mail_admins': {
              'level': 'ERROR',
              'filters': ['require_debug_false'],
              'class': 'django.utils.log.AdminEmailHandler'
          }
      },
      'loggers': {
          'django.request': {
              'handlers': ['mail_admins'],
              'level': 'ERROR',
              'propagate': True,
          },
      }
  }
  </code></pre>
  
  <p>populate_book.py::</p>
  
  <pre><code>    import os
  from random import randint
  if __name__ == '__main__':
      os.environ.setdefault("DJANGO_SETTINGS_MODULE", "cope.settings")
  
  from opac.models import Book, BookCopy
  
  def make_isbn():
      return randint(1000000000000, 9999999999999)
  
  titles = ['Gray Hat Python', 'Introduction to Algorithms', 'Pro Python',
      'HTML5 and JavaScript Projects', 'NginX HTTP Server', 'Redis Cookbook',
      'Python Fundamentals', 'Land of Lisp', 'Beginning iOS Game Development',
      'Ruby on Rails for Dummies', 'Django, AJAX and jQuery']
  
  authors = ['Seitz', 'Thomas H. Corman', 'Marty Alchin', 'Geanie Mayer', 'Clement',
      'Tiago Macedo', 'Kent Lee', 'Courad', 'Patrick', 'Barry Burd', 'Jonathan Hayward']
  
  publishers = ['No Starch Press', 'Stanford Press', 'Apress', 'Apress', 'Packt OpenSource',
      'O\'Reilly', 'Springer', 'No Starch Press', 'WROK', 'For Dummies', 'Packt OpenSource']
  
  imageurls = ['grayhat.png', 'introtoalgo.png', 'propython.png', 'htmljs.png', 'nginx.png',
      'redis.png', 'pythonfundamentals.png', 'lisp.png', 'ios.png', 'ror.png', 'djangoajax.png']
  
  def main():
      for i in range(len(titles)):
          isbn = make_isbn()
          new_book = Book(title=titles[i], isbn=isbn, ddc=randint(100,999), authors = authors[i],
              publisher=publishers[i], cost=randint(300,700), imageurl=imageurls[i], pages=randint(300,700))
          new_book.save()
          print '\n%4d | ISBN: %s | Title: %s' % (i+1, isbn, titles[i])
          for j in range(randint(5,10)):
              book_number = randint(50000,900000)
              book_copy = BookCopy(book_number=book_number, book_category=new_book)
              book_copy.save()
              print '%10d | Book Number: %-6d | Category: %s' % (j+1, book_number, new_book.title)
  
  if __name__ == '__main__':
      main()
  </code></pre>
  
  <p>manage.py::</p>
  
  <pre><code>    #!/usr/bin/env python
  import os
  import sys
  
  if __name__ == "__main__":
      os.environ.setdefault("DJANGO_SETTINGS_MODULE", "cope.settings")
  
      from django.core.management import execute_from_command_line
  
      execute_from_command_line(sys.argv)
  </code></pre>