#NEWLINE# def load_value( self , session , key ) : #NEWLINE# #INDENT# 'How to load the value from the given Redis ``key``.\n        Subclasses have to implement it.  By default it raises\n        :exc:`~exceptions.NotImplementedError`.\n\n        :param session: the session object that stores the given ``key``\n        :type session: :class:`sider.session.Session`\n        :param key: the key name to load\n        :type key: :class:`str`\n        :returns: the Python representation of the loaded value\n\n        ' #NEWLINE# cls = type ( self ) #NEWLINE# raise NotImplementedError ( '{0}.{1}.load_value() method must be implemented' . format ( cls . __module__ , cls . __name__ ) )