code: def cache_set(key, value, timeout=None, refreshed=False):
      
      if timeout is None:
          timeout = settings.CACHE_MIDDLEWARE_SECONDS
      refresh_time = timeout + time()
      real_timeout = timeout + settings.CACHE_SET_DELAY_SECONDS
      packed = (value, refresh_time, refreshed)
      return cache.set(_hashed_key(key), packed, real_timeout)
docs: Wrapper for ``cache.set``. Stores the cache entry packed with
      the desired cache expiry time. When the entry is retrieved from
      cache, the packed expiry time is also checked, and if past,
      the stale cache entry is stored again with an expiry that has
      ``CACHE_SET_DELAY_SECONDS`` added to it. In this case the entry
      is not returned, so that a cache miss occurs and the entry
      should be set by the caller, but all other callers will still get
      the stale entry, so no real cache misses ever occur.