Tornado自定义Session

#!/usr/bin/env python
import tornado.ioloop
import tornado.web

container = {}
class Session:
    def __init__(self,handler):
        self.handler = handler
        self.random_str = None

    def __set_random_str(self):
        import hashlib
        import time
        obj = hashlib.md5 ( )
        obj.update ( bytes ( str ( time.time ( ) ), encoding='utf-8' ) )
        random_str = obj.hexdigest ()
        return random_str
    def __setitem__(self,key,value):
        if not self.random_str:
            random_str = self.handler.get_cookie('__kakaka__')
            if not random_str:
                random_str = self.__set_random_str()
                container[random_str] = {}
            else:
                if random_str in container.keys():
                    pass
                else:
                    random_str = self.__set_random_str()
                    container[random_str] = {}
            self.random_str = random_str
        container[self.random_str][key] = value
        self.handler.set_cookie("__kakaka__",self.random_str)
    def __getitem__(self,key):
        random_str = self.handler.get_cookie('__kakaka__')
        if not random_str:
            return None
        user_info_dict = container.get(random_str,None)
        if not user_info_dict:
            return None
        value = user_info_dict.get(key,None)
        return value
class BaseHandler(tornado.web.RequestHandler):
    def initialize(self):
        self.session = Session(self)
class IndexHander(BaseHandler):
    def get(self, *args, **kwargs):
        if self.get_argument('u',None)in['alex','eric']:
            self.session['is_login'] = True
            self.session['name'] = self.get_argument('u',None)
           
        else:
            self.write('请登录')
class ManagerHandler(BaseHandler):
    def get(self, *args, **kwargs):
        val = self.session['is_login']
        if val:
            self.write(self.session['name'])
        else:
            self.write("失败")

settings = {
    "template_path":"views",
    "static_path":"statics",
    "cookie_secret":"taochen"
}

application = tornado.web.Application([
    (r"/index",IndexHander),
    (r"/manager",ManagerHandler),
],**settings)

if __name__ == '__main__':
    application.listen(8888)
    tornado.ioloop.IOLoop.instance().start()

app.py

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
     <div>首页</div>
</body>
</html>

index.html