I have a simple Flask program as follows:
#!/usr/bin/env python
from flask import Flask
app = Flask(__name__)
@app.route('/')
def index():
    import datetime
    lines = """ 
    This is the index page
    <br>
    %s
    """%( datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") )
    return lines
But I would like the date to continue to update every second (without having to refresh the page). Is there a way to do this?