问如何向特定的登录用户推送通知。我的代码如下所示

EN

  var source = new EventSource('/stream');
            source.onmessage = function (event) {

                 console.log(event)
            };

from redis import Redis
redis = Redis()


import time
from datetime import datetime
p = redis.pipeline()
 app.config['ONLINE_LAST_MINUTES'] = 5


def check_updates():
   yield 'data: %s \n\n' % data

@app.route('/stream')
   #@nocache
   def stream():
      return Response(check_updates(),mimetype='text/event-stream')