# -*- coding: utf-8 -*-
from __future__ import absolute_import, unicode_literals


class SessionStorage(object):
    def get(self, key, default = None):
        raise NotImplementedError()

    def set(self, key, value, ttl = None):
        raise NotImplementedError()

    def delete(self, key):
        raise NotImplementedError()

    def __getitem__(self, key):
        self.get(key)

    def __setitem__(self, key, value):
        self.set(key, value)

    def __delitem__(self, key):
        self.delete(key)