old_contents: from datetime import timedelta
  
  from functools import wraps
  
  from django.core.cache import cache
  
  from fandjango.settings import DISABLED_PATHS
  from fandjango.settings import ENABLED_PATHS
  
  def is_disabled_path(path):
      """
      Determine whether or not the path matches one or more paths
      in the DISABLED_PATHS setting.
  
      :param path: A string describing the path to be matched.
      """
      for disabled_path in DISABLED_PATHS:
          match = re.search(disabled_path, path[1:])
          if match:
              return True
      return False
  
  def is_enabled_path(path):
      """
      Determine whether or not the path matches one or more paths
      in the ENABLED_PATHS setting.
  
      :param path: A string describing the path to be matched.
      """
      for enabled_path in ENABLED_PATHS:
          match = re.search(enabled_path, path[1:])
          if match:
              return True
      return False
  
  def cached_property(**kwargs):
      """Cache the return value of a property."""
      def decorator(function):
          @wraps(function)
          def wrapper(self):
              key = 'fandjango.%(model)s.%(property)s_%(pk)s' % {
                  'model': self.__class__.__name__,
                  'pk': self.pk,
                  'property': function.__name__
              }
  
              cached_value = cache.get(key)
  
              delta = timedelta(**kwargs)
  
              if cached_value is None:
                  value = function(self)
                  cache.set(key, value, delta.days * 86400 + delta.seconds)
              else:
                  value = cached_value
  
              return value
          return wrapper
      return decorator
  
new_contents: import re
  from datetime import timedelta
  from functools import wraps
  
  from django.core.cache import cache
  
  from fandjango.settings import DISABLED_PATHS
  from fandjango.settings import ENABLED_PATHS
  
  def is_disabled_path(path):
      """
      Determine whether or not the path matches one or more paths
      in the DISABLED_PATHS setting.
  
      :param path: A string describing the path to be matched.
      """
      for disabled_path in DISABLED_PATHS:
          match = re.search(disabled_path, path[1:])
          if match:
              return True
      return False
  
  def is_enabled_path(path):
      """
      Determine whether or not the path matches one or more paths
      in the ENABLED_PATHS setting.
  
      :param path: A string describing the path to be matched.
      """
      for enabled_path in ENABLED_PATHS:
          match = re.search(enabled_path, path[1:])
          if match:
              return True
      return False
  
  def cached_property(**kwargs):
      """Cache the return value of a property."""
      def decorator(function):
          @wraps(function)
          def wrapper(self):
              key = 'fandjango.%(model)s.%(property)s_%(pk)s' % {
                  'model': self.__class__.__name__,
                  'pk': self.pk,
                  'property': function.__name__
              }
  
              cached_value = cache.get(key)
  
              delta = timedelta(**kwargs)
  
              if cached_value is None:
                  value = function(self)
                  cache.set(key, value, delta.days * 86400 + delta.seconds)
              else:
                  value = cached_value
  
              return value
          return wrapper
      return decorator
  
subject: Fix ImportError