  configured_caches = {}
  for _cache_params in settings.CACHES.values():
      configured_caches[_cache_params['BACKEND']] = _cache_params
  
  MemcachedCache_params = configured_caches.get('django.core.cache.backends.memcached.MemcachedCache')
  PyLibMCCache_params = configured_caches.get('django.core.cache.backends.memcached.PyLibMCCache')
  PyMemcacheCache_params = configured_caches.get('django.core.cache.backends.memcached.PyMemcacheCache')
  
  # The memcached backends don't support cull-related options like `MAX_ENTRIES`.
  memcached_excluded_caches = {'cull', 'zero_cull'}
 
</s> remove     # Some caches -- python-memcached in particular -- need to do a cleanup at the
    # end of a request cycle. If not implemented in a particular backend
    # cache.close is a no-op
 </s> add     # Some caches need to do a cleanup at the end of a request cycle. If not
    # implemented in a particular backend cache.close() is a no-op. </s> remove         # pylibmc doesn't seem to have SERVER_MAX_VALUE_LENGTH as far as I can
        # tell from a quick check of its source code. This is falling back to
        # the default value exposed by python-memcached on my system.
        max_value_length = getattr(cache._lib, 'SERVER_MAX_VALUE_LENGTH', 1048576)
 </s> add         max_value_length = 2 ** 20
  configured_caches = {}
  for _cache_params in settings.CACHES.values():
      configured_caches[_cache_params['BACKEND']] = _cache_params
  

  PyLibMCCache_params = configured_caches.get('django.core.cache.backends.memcached.PyLibMCCache')
  PyMemcacheCache_params = configured_caches.get('django.core.cache.backends.memcached.PyMemcacheCache')
  
  # The memcached backends don't support cull-related options like `MAX_ENTRIES`.
  memcached_excluded_caches = {'cull', 'zero_cull'}
keep keep keep keep replace keep keep keep keep keep
 Fixed #32193 -- Deprecated MemcachedCache. 
tests/cache/tests.py