In Flask, also, you can organize your applications using Blueprints, a built-in concept in Flask similar to Python modules. If you have worked with Django, you might have found your project divided into different modules.

But it's not a good practice for a large-scale app.īy doing this, you are clearly violating the Single Responsibility Principle, where each piece of your application should handle just one responsibility. You will find a lot of tutorials that follow the same pattern. Sometimes you'll find developers dumping all of their logic into a single file called app.py. Similar to that, if you have other blueprints, you can register them.Flask is a simple, easy-to-use microframework for Python that can help you build scalable and secure web applications. One of these is url prefix, which you could need.Īpp.register_blueprint(admin, url_prefix='/admin') For even more customisation, you can also supply the procedure other parameters. Using the register_blueprint() method and the blueprint's name, we register the blueprint. We will construct a Flask app and register our blueprints there in the _init_.py file: But will your app be aware of this blueprint automatically? You currently have a route registered to a blueprint. We have used bp.route('.') rather than the typical This is how a route is connected to a certain blueprint. You may now use the blueprint you developed for the admin-related functionality when establishing routes for the admins.Ĭoncentrate on the line where the route is specified in the given snippet. You declare that you'll use blueprint-specific templates and static files by defining the template folder and static folder options. Optional keyword arguments are supplied as the third and fourth parameters. This aids in locating the blueprint's root path. The second option is the Blueprint package's name, which is often _name_. Internal routing will later use this name, as we'll see below. The first parameter when creating an object of the Blueprint class is the name you wish to give your Blueprint. You can import Blueprint from the Flask library because it is a built-in Flask concept. In the admin/routes.py file, let's define our very first blueprint for the admin functionality: Now that you understand what problems Blueprints solves, let's see how we can use Blueprints in our applications. The logic for admin is located in the admin folder, the logic for products is located in the products folder, and so on. You can see that your concerns are well separated at this point. Additionally, you can put the logic and static files all in the same subdirectory.Ĭonsequently, your similar application will now look like this because to Blueprints:

By grouping the logic into subdirectories, blueprints aid in the structure of your application. When you imagine that you have created a large-scale programme, doesn't that look messy? You have scattered your models and different routes throughout the same file.įlask Blueprints now come into play in this scenario. Isn't the folder wonderfully organised? The only thing you have is an app.py file that contains all of the application functionality.Īpp.run(host=’0.0.0.0’,port=5000,debug=True) Your project structure will like this if you construct a simple application using the Flaskdocumentation: Additionally, you may organise your Flask applications using Blueprints, a Python module-like built-in idea. If you've used Django, your project may have been broken up into many modules. You are obviously going against the Single Duty Principle by doing this, which states that each component of your application should only be handling one responsibility. But for a big app, it's not a good approach. Many tutorials can be found online that use the same format. There are occasions when programmers will place all of their logic in a single file named app.py. Flask is a simple, easy-to-use micro web framework for Python that can help you build scalable and secure web applications.

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