old_contents: import sys
  
  import django
  
  if (1, 4) <= django.VERSION <= (1, 5):
      from django.utils.functional import SimpleLazyObject as DefaultSimpleLazyObject
  
      class SimpleLazyObject(DefaultSimpleLazyObject):
  
          def __contains__(self, item):
              if self._wrapped is None:
                  self._setup()
              return self._wrapped.__contains__(item)
  else:
      from django.utils.functional import SimpleLazyObject
  
  try:
      basestring
  except:
      basestring = str  # Python3
  
  PY2 = sys.version_info[0] == 2
  if not PY2:
      text_type = str
      binary_type = bytes
      string_types = (str,)
      integer_types = (int,)
  else:
      text_type = unicode
      binary_type = str
      string_types = basestring
      integer_types = (int, long)
  
  try:
      # avoid RemovedInDjango19Warning by using lru_cache where available
      from django.utils.lru_cache import lru_cache
  except ImportError:
      from django.utils.functional import memoize as lru_cache
  
new_contents: import sys
  
  import django
  
  if (1, 4) <= django.VERSION <= (1, 5):
      from django.utils.functional import SimpleLazyObject as DefaultSimpleLazyObject
  
      class SimpleLazyObject(DefaultSimpleLazyObject):
  
          def __contains__(self, item):
              if self._wrapped is None:
                  self._setup()
              return self._wrapped.__contains__(item)
  else:
      from django.utils.functional import SimpleLazyObject
  
  try:
      basestring
  except:
      basestring = str  # Python3
  
  PY2 = sys.version_info[0] == 2
  if not PY2:
      text_type = str
      binary_type = bytes
      string_types = (str,)
      integer_types = (int,)
  else:
      text_type = unicode
      binary_type = str
      string_types = basestring
      integer_types = (int, long)
  
  try:
      # avoid RemovedInDjango19Warning by using lru_cache where available
      from django.utils.lru_cache import lru_cache
  except ImportError:
      from django.utils.functional import memoize
  
      def lru_cache():
          def decorator(function, cache_dict={}):
              return memoize(function, cache_dict, 1)
          return decorator
  
subject: Fix lru_cache fallback decorator