Flask Routing Basics

Flask uses decorators to map a URL route to a view function. Jinja2 is the templating engine used to render HTML from templates.

from flask import Flask

app = Flask(__name__)

@app.route("/api/notes")
def notes():
    return {"notes": []}

Each route can also accept dynamic segments like /note/<slug>, and you can pass data into a Jinja2 template with render_template(...).