in the cache.  `value` is a string and
        `timeout` the timeout of the key.  If timeout is not provided
        a default timeout or no timeout should be assumed, if it's
        provided it's an integer with the number of seconds the cache
        item should exist.

    .. method:: get(key)

        Returns the value for the cache key.  If the item does not
        exist in the cache the return value must be `None`.

The other arguments to the constructor are the prefix for all keys that
is added before the actual cache key and the timeout for the bytecode in
the cache system.  We recommend a high (or no) timeout.

This bytecode cache does not support clearing of used items in the cache.
The clear method is a no-operation function.

.. versionadded:: 2.7
   Added support for ignoring memcache errors through the
   `ignore_memcache_errors` parameter.
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