<s> class SessionStorage ( object ) : <EOL> def get ( self , id ) : <EOL> raise NotImplementedError ( ) <EOL> def set ( self , id , session ) : <EOL> raise NotImplementedError ( ) <EOL> def delete ( self , id ) : <EOL> raise NotImplementedError ( ) <EOL> def __getitem__ ( self , id ) : <EOL> return self . get ( id ) <EOL> def __setitem__ ( self , id , session ) : <EOL> self . set ( id , session ) <EOL> def __delitem__ ( self , id ) : <EOL> self . delete ( id ) </s>
