google-app-engine – GAE webapp2会话：创建和检查会话的正确过程

,我的步骤如下：

1.配置并添加配置到主应用程序：

config = {}
config['webapp2_extras.sessions'] = {
    'secret_key': 'my_secret_key',
}
app = webapp2.WSGIApplication([...], config=config)

2.在登录处理程序中创建会话

# Delete existent session
  --> not mention in the tutorial
# member is found    
self.session_store = sessions.get_store(request=handler.request)
self.session['account'] = member.account

3.在程序中的各个位置检查会话是否存在

if self.session['account']:
    # Session exists

4.用户注销时删除会话

--> not mentioned in the tutorial

我的问题：

>在会话创建过程中,我收到错误消息“…对象没有属性”会话“(步骤2)

>如何在步骤2和4中删除会话？

>整个会话管理过程是否正确？

谢谢.

这是处理程序的一个例子,以及如何使用webapp2额外的会话

main.py与BaseHandler和MainHandler

import webapp2
from webapp2_extras import sessions

class BaseHandler(webapp2.RequestHandler):              # taken from the webapp2 extrta session example
    def dispatch(self):                                 # override dispatch
        # Get a session store for this request.
        self.session_store = sessions.get_store(request=self.request)

        try:
            # Dispatch the request.
            webapp2.RequestHandler.dispatch(self)       # dispatch the main handler
        finally:
            # Save all sessions.
            self.session_store.save_sessions(self.response)

    @webapp2.cached_property
    def session(self):
        # Returns a session using the default cookie key.
        return self.session_store.get_session()

class YourMainHandler(BaseHandler):

    def get(self):

        ....
        self.session['foo'] = 'bar'


    def post(self):


        foo = self.session.get('foo')

如果你有一个单独的login.py：

.... other imports
import main

class Login(main.BaseHandler):

    def get(self):

        ....
        self.session['foo'] = 'bar'


    def post(self):


        foo = self.session.get('foo')