Web frameworks provide a way of structuring and organizing Web Apps. There are many frameworks to choose from, so in this article, we will review five popular ones to build fast and scalable websites.

1.Flask

Flask is a micro web framework for Python. It's built on top of Werkzeug and Jinja2 to create the backend and easily handle the frontend. It does not require any particular tools or libraries, making it classified as a microframework.

Flask is used in production to work together with different databases (SQLAlchemy, MongoDB) and comes with a rich set of plugins from authentication to caching.

Website: https://flask.palletsprojects.com/

2.Django

Django is a free and open-source web application framework, written in Python. Django emphasizes rapid development and supports a wide variety of database backends without requiring the up-front investment in software development. Django includes many out-of-the-box features showcased on widespread websites.

Django's goal is to make building websites optimized for databases a much easier process. The framework emphasizes reusability and "plug-and-play" capabilities, less code, low coupling, and rapid development. Python is used throughout, even in settings and data models. Django provides an optional administrative interface that is generated dynamically through instantiating classes.

Website: https://www.djangoproject.com/

3.Tornado

Tornado is a Python web framework based on asynchronous event-driven IO. The Tornado design principle is to route all requests through a single process: the webserver. It scales very well, with good uptime, and high throughput with lightning fast response times.

Website: https://www.tornadoweb.org

4.Bottle

The bottle is a fast and simple Python web framework. One of the things I like about Bottle is that all of the middleware hooks are interchangeable, so you can swap out anything and change how your site behaves, but there is also one standard hook that handles the connection to the database. This is sometimes called "negotiated handler". There's no need for separate library imports either because Bottle comes with one built-in for easy integration.

Website: http://bottlepy.org/docs/dev/

5. Turbo Gears

TurboGears is an open-source web application framework for Python programmers. It consists of several WSGI components such as WebOb, SQLAlchemy, Genshi, and Repoze.

TurboGears is an open-source Web framework written in Python. It features all the benefits of the MVC pattern with a simple and powerful architectural pattern that ensures flexibility, support for modern Web technologies through a robust and shiny collection of tools.

Website: https://turbogears.org/