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Django Vs Flask Which One Use Finally in 2021

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Web Development industry in recent years is leaning towards lightweight frameworks and microservices. To fulfill the purpose Web Developers have a wide variety of frameworks to start with full-stack development of large and complex web applications. If you are up to making a Python based web application, then Django Vs Flask are worth grabbing the opportunity of being chosen widely by Python programmers around the world.

Django is a free and open-source python-based web framework that encourages rapid and clean full-stack web development. It is developed considering the batteries-included approach. A programmer can accomplish most of the common web development tasks with Django’s framework tools, instead of using any third-party tool or library.

Both Django and Flask happened to be highly recommended and widely used web frameworks for Python-based web development with sufficient mature communities; the only difference lies in between their approaches to achieve a task. 

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Framework Flexibilities

Django supports a batteries-included approach which means that it offers a variety of tools, features, and patterns within the framework itself making it feasible for Django developers to implement common tasks frequently occurring in the project such as URL routing, user authentication, and database schema migration.

Django is also more stable than Flask as the releases of newer versions and features are not very frequent and have strong backward compatibility with the existing versions. Django supports custom web development tasks by providing a built-in template engine, bootstrapping tool, ORM system, etc.
On the other hand, Flask is a lightweight and minimalist web framework but handles the core structuring well. It provides you with URL routing, cookies, error handling, development server, templating, request handling, debugging, and unit testing support.

Features

Admin Interface

Django has a fully functional web-based admin panel for the developers that provides them with a user interface to manage the data and associated operations of the project models. They can use the panel to perform CRUD operations, user management, content administration, and much more without writing any extra code for it. The panel is customizable to fit according to different business requirements.

Flask does not offer a panel or interface like this to manage administrative tasks but provides you with a Flask-Admin extension for the same purpose. The Flask Admin again is an explicitly managed tool which means that the developer needs to write some boilerplate code to tell the Admin panel how to function and what to do, but it can help in doing customization in the future.

It supports various databases such as Peewee, SQLAlchemy, MonoEngine, or you can add your own backends too.

Authorization and Authentication

Every web portal needs to incorporate user authentication and authorization of user rights. Django provides this functionality within the framework along with sessions support and account management.
Flask also provides cookie-based sessions, but for the account management, user authentication, and authorization you need to turn to the extension.

Template Engine

To develop the user interfacing layer of a web application Django provides the developers with a built-in template engine. This gives developers the flexibility of developing user interfaces without extra effort and time, while also speeding up the process of customization. Customization of templates in Django can be accomplished by writing templates in Django Template Language (DTL).
We have already talked about Jinja2 in Flask which is basically a template engine for Python and is inspired from Django’s template system. It allows developers to write templates in an expressive language or usage of integrated sandboxed execution environment for rapidly developing dynamic websites.

Support for Databases

Strong backend database support is an integral part of any web application and while using a framework, developers expect some sort of database support.

Flask in contrary to Django, does not provide the developers with a built-in ORM system, instead the developers have to perform database operations through SQLAlchemy as a SQL toolkit. For Database migration, Flask supports the Flask-Alembic extension.

Reusable Components

When a project grows, its file structure tends to be more and more and complicated, which makes it difficult to manage the project and to include new developers into the project. Both Django and Flask helps you with breaking down the file structure and making related file groups that exhibit similar functionality.

For example, you can group all routing files together, entire user-related functionality together, all the views in one place, etc. To do so, Django has the concept of app which means that the developer can create multiple separate applications in a project and use those applications to extend the functionality of web, whereas Flask supports blueprints.

Testing

Both Django and Flask provides built-in support for unit testing by making use of Python’s unittest framework. They also provide you with the support of testing client who you can send requests and assess the incoming response.

Security

Django offers built-in protection against various common attacks such as SQL injections, XSS, and CSRF. However, in Flask since there is a lack of built-in code base which means having a lesser surface area for attacks. However, for various functionalities Flask relies on third-party extensions which means that it’s as safe from attacks as the least secure third-party extension.

Which One to Use Finally?

Django Vs Flask are both competitive enough in the Python-based web development industry focused on full-stack development. The developers are quite motivated to take their hands on both of these wonderful frameworks.

However, various usage statistics show Django getting over Flask due to its built-in functionalities. If you are to build something which is robust and complex, dive into the features of Django and check if its offerings meet your business requirements; however, if you want to develop either a simple static website or otherwise willing to use third-party extensions then go for Flask, it surely gives you space for customization.

Final Thoughts

Conclusively, both Django and Flask are open-source and free Python-based full-stack web development frameworks and essentially does the same job the difference lies in their approaches only and to figure that out, we assessed quite a few aspects of both the frameworks such as the flexibilities, built-in features and extensions, security, and testing support, etc.

It is up to the development team to understand the feasibility of their business idea requirements and decide which of the framework suits them best.