Structuring Large Apps with Blueprints

🐍 FlaskLesson 10Intermediate

Blueprints allow you to organize your web application into modules. This helps in scaling applications, organizing code layers, and separating domain concerns.

1 Creating & Registering Blueprints

Python — blog/routes.py

from flask import Blueprint, render_template

blog_bp = Blueprint("blog", __name__, template_folder="templates")

@blog_bp.route("/")
def index():
    return render_template("blog/index.html")

Python — main_app.py

from flask import Flask
from blog.routes import blog_bp

app = Flask(__name__)
# Registering Blueprint with URL prefix
app.register_blueprint(blog_bp, url_prefix="/blog")

2 Code Challenge

Challenge: Create an api_bp blueprint structure for user-endpoints, configuring routing prefixes mapping to /api/v1/users/ cleanly.