How to display a dynamically updated page with Flask?

Question

Flask

Dear toasters, I have a question for you.
How to display a dynamically updated page using flask, for example, a
date and time string once per second.

import datetime
import time
while True:
time.sleep(1)
now_time = datetime.datetime.now()
vremya = now_time.strftime("%d\%m\%Y %H:%M:%S")
print vremya

Answer 1

A fairly common solution is to request the server with some periodicity from the side of the page using Ajax (from JS). Like "did nothing change?" And on the server each time to answer, either - "not", or "yes, this is it." And on JS update it.