I am studying from the book "Head First Python, 2nd Edition". And I have this specific code in Flask: from flask import Flask app = Flask(__name__) app.route("/") def hello() -> str: return "Hello world from Flask!" app.run() I followed everything from the book, made no mistakes, and yet I still get the error "URL Not Found". I have searched everywhere for a solution to this problem, but it hasn't helped. Could you please advise what to do? Continue reading...
