Flask Framework Cookbook - Second Edition

How to do it...

The following is an example of a simple Hello World application using Blueprint. It will work in a manner similar to the previous recipe but is much more modular and extensible.

First, we will start with the following flask_app/my_app/__init__.py file:

from flask import Flask 
from my_app.hello.views import hello 
 
app = Flask(__name__) 
app.register_blueprint(hello) 

Next, the views file, my_app/hello/views.py, which should look as follows:

from flask import Blueprint from my_app.hello.models import MESSAGES hello = Blueprint('hello', __name__) @hello.route('/') @hello.route('/hello') def hello_world(): return MESSAGES['default'] @hello.route('/show/<key>') def get_message(key): return MESSAGES.get(key) or "%s not found!" % key ...