# MCS 275 Spring 2022 Lecture 35 # Minimal Flask demo from flask import Flask, render_template import random app = Flask(__name__) @app.route("/") def front(): """Return howto""" return """

Demo app

This is a simple Flask demo. The front page doesn't do anything interesting.

To see the actual demonstrations, visit /greeting or /admonition.

""" @app.route("/greeting") # <-- Flask decorator indicates URL for a function def f(): # (The name of this function doesn't matter) """Return HTML for a greeting""" return """

Hello there!!!

Your random number for today is: {}

Here is an image, included as a static file served from the /static subdirectory:

""".format(random.randint(1,100)) @app.route("/admonition") # <-- Flask decorator indicates URL for a function def g(): # (The name of this function doesn't matter) """Return HTML for a warning""" x = random.randint(1,100) # Load the file admon.html in the templates subdir # In it, replace any instance of {{ random_integer }} # with the value of the variable x. Then, make the # resulting HTML the response to this HTTP request return render_template("admon.html",random_integer=x) app.run() # Start the web server; I lost control from here on