How can i send that data value continuously to my html page using python

*** This is a python program ,for how to read data from cloud. same data need to be update continuously in html page with in 1 second time interval. if any one know please help me how to push data in html continuously***

from flask import Flask, request, jsonify, render_template
from flask_mqtt import Mqtt

app = Flask(__name__)

app.config['MQTT_BROKER_URL'] = 'broker.emqx.io'
app.config['MQTT_BROKER_PORT'] = 1883
app.config['MQTT_USERNAME'] = 'AMIRUL****'  # Set this item when you need to verify username and password
app.config['MQTT_PASSWORD'] = 'AMI123@****'  # Set this item when you need to verify username and password
app.config['MQTT_KEEPALIVE'] = 50  # Set KeepAlive time in seconds
app.config['MQTT_TLS_ENABLED'] = False  # If your broker supports TLS, set it True
topic = 'python2/mqtt'

mqtt_client = Mqtt(app)


@app.route('/')
def home():
    return render_template('index.html')


@mqtt_client.on_connect()
def handle_connect(client, userdata, flags, rc):
   if rc == 0:
       print('Connected successfully')
       mqtt_client.subscribe(topic) # subscribe topic
   else:
       print('Bad connection. Code:', rc)


@mqtt_client.on_message()
def handle_mqtt_message(client, userdata, message):
   data = dict(
       topic=message.topic,
       payload=message.payload.decode()
  )
   data1=message.payload.decode()
   print('{payload}'.format(**data))

   @app.context_processor
   def ret():
        return {'value':data1}


@app.route('/publish', methods=['POST'])
def publish_message():
   request_data = request.get_json()
   publish_result = mqtt_client.publish(request_data['topic'], request_data['msg'])
   return jsonify({'code': publish_result[0]})


if __name__ == '__main__':
   app.run(host='127.0.0.1', port=5000)