app.py

import time
from flask import Flask, redirect, url_for
app = Flask(__name__)

updates = ["INIT"]


@app.route("/")
def hello_world():
    update_times = "\n".join([f"<li>{i}</li>" for i in updates])
    return f"<p>Hello, World!</p><hr><h2>UPDATES</h2>{update_times}"


@app.route("/update")
def update():
    current_time = time.ctime()

    updates.append(str(current_time))
    return redirect(url_for('hello_world'))