Flask is a Python-based micro web framework that does not have a database abstraction layer. Libraries and form validation are not required. This tool does not depend on third-party libraries to provide common functions. It supports extensions for adding features to applications in a way that integrates them with Flask itself. This framework is easy to learn and manage because it requires less base code to implement simple web applications. The core is small but is easily extendable, and some features include URL routing and a template engine. Flask falls into the category of a WSGI web app framework.

There are several advantages to using Flask over other similar tools. Flask offers a higher level of compatibility with the latest technologies. It provides the ability for experimentation and works better than other tools for simple situations. Flask offers higher scalability and makes building a prototype quick and easy. You can integrate it with a wide range of databases, both develop and maintain applications, as well as access a multitude of online resources when learning to use Flask through sources such as GitHub.

Flask is a micro web framework because it does not require specific libraries or tools. It is Unicode-based and uses a simple, extendable core. This framework allows users to build web applications such as blogs, web pages, and wiki pages. It contains many useful features, including support for unit testing, a development server and debugger, restful request dispatching, and extensive documentation. Flask uses Jinja templating and supports secure cookies. It is 100% WSGI 1.0 compliant and is easy to configure, which makes it a favorite tool among software engineers and data scientists.