# settings.py INSTALLED_APPS = ( 'longerusername', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.admin', # ... ) def _enable_conditional(application): global INSTALLED_APPS try: __import__(application) INSTALLED_APPS += (application,) except ImportError: pass _enable_conditional('django_extensions') _enable_conditional('debug_toolbar')