+from django.core.exceptions import ImproperlyConfigured
+
+
+MIDDLEWARE_NOT_CONFIGURED = ImproperlyConfigured("""Philo requires the RequestNode middleware to be installed. Edit your MIDDLEWARE_CLASSES setting to insert 'philo.middleware.RequestNodeMiddleware'.""")
+
+
class ViewDoesNotProvideSubpaths(Exception):
""" Raised by get_subpath when the View does not provide subpaths (the default). """
silent_variable_failure = True