old_contents: import sys
  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 as memoize
  except:
      from django.utils.functional import memoize
  
new_contents: import sys
  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
      def memoize(function, *args):
          return lru_cache()(function)
  except:
      from django.utils.functional import memoize
  
subject: Fix lru_cache import as memoize