Index_blueprint = Blueprint('index', index():Īpplication. Views/index.py from flask import Blueprint, render_template Make it easier for others to maintain the application.įolder Structure of Large Application /app A basic flask blueprints exampleĪ minimal Flask application looks something like this: from flask import FlaskĪ large Flask application can separate one file into multiple files by blueprints. You can reuse Blueprint applications however you cannot run a blueprint on its own as it has to be registered on your main application. They make administration of very large Flask applications easier and as such can be used to scale Flask applications. Now we can run the app with this command: uwsgi -ini uwsgi.Blueprints are a powerful concept in Flask application development that allow for flask applications to be more modular and be able to follow multiple patterns. Master: Master mode should be enable for various reasons We don't use them right now but now we don't have to worry about it. If you write your blueprint in a separate Python package, then you have a component that encapsulates the elements related to specific feature of the. A blueprint can include elements such as routes, view functions, forms, templates and static files. Rather it is a blueprint of how to construct or extend an application. A Blueprint object works similarly to a Flask application object, but it is not actually an application. Single-interpreter: It is recommended to turn this on because it might interfere with the next optionĮnable-threads: This needs to be turned on if you are using additional threads in your application. In Flask, a blueprint is a logical structure that represents a subset of the application. Blueprints can greatly simplify how large applications work and provide a central means for Flask extensions to register operations on applications. The http and wsgi-file options are the same as in the manual command. In order not to type in the full command everytime we will create a uwsgi.ini file to store that configuration: However, the endpoint for the index view defined below will be blog.index. The blog is the main feature of Flaskr, so it makes sense that the blog index will be the main index. So the index view will be at /, the create view at /create, and so on. " by pointing your browser to localhost:5000 Unlike the auth blueprint, the blog blueprint does not have a urlprefix. It should be noted that a blueprint is not a ‘plug and play’ app, it cannot run on. Just like a normal flask application, a blueprint defines a collection of views, templates and static assets. Now it is time to run the app: uwsgi -wsgi-file app.py -http :5000 What are flask blueprints Basically, a flask blueprint is a way for you to organize your flask application into smaller and re-usable application. That's why we create an alias for our app in the last line. In flask the conventional name for the application is app but uWSGI looks for application by default. Return "Hello uWSGI from python version: " + version Now let's create a simple test application: Python2 -m pip install uwsgi # for python2 If you are unsure about the python version your pip uses make it explicit: python3 -m pip install uwsgi # for python3 In this example we will install uWSGI and run a simple test application with it. The most obvious reason is the fact that the werkzeug server is single-threaded and thus can only handle one request at a time.īecause of this we want to use the uWSGI Server to serve our application instead. The built-in werkzeug server certainly is not suitable for running production servers.
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