Jinja2 variables

templates\template.html

<h1>Here is the message from the server:</h1>
<p>{{message}}</p>

server.py

from flask import *
app = Flask("placeholders for dynamic data using jinja")

@app.route("/")
def main():
    return render_template("template.html",
                           message = "hello!")
 
app.run(debug=True)