redis-singleton.py

import aioredis


class MyRedis(object):
    _redis = None
    
    @classmethod
    async def redis(cls):
        if not cls._redis:
            cls._redis = await aioredis.create_redis('redis://localhost')
        return cls._redis

tornado-redis.py

from tornado.web import RequestHandler
from redis-singleton import MyRedis


class MyHandler(RequestHandler):

    async def get(self):
        id = self.request.arguments.get('id', None)
        self.redis = await MyRedis.redis()
        await self.redis.set(id, json.dumps({"status": 0}))