Besides the quickstart, there is also a more detailed Tutorial that shows how to create a complete (albeit small) application with Flask. If you’d rather dive into the internals of Flask, check out the API …

Flask provides a really simple way to give feedback to a user with the flashing system. The flashing system basically makes it possible to record a message at the end of a request and access it on the …

Flask protects you against one of the most common security problems of modern web applications: cross-site scripting (XSS). Unless you deliberately mark in-secure HTML as secure, Flask and the …

We will use Flask and SQLite as database which comes out of the box with Python, so there is nothing else you need. If you want the full sourcecode in advance or for comparison, check out the example …

Flask parses incoming request data for you and gives you access to it through that global object. Internally Flask makes sure that you always get the correct data for the active thread if you are in a …

Introducing Flaskr ¶ We will call our blogging application flaskr here, feel free to choose a less web-2.0-ish name ;) Basically we want it to do the following things: let the user sign in and out with credentials …

Nov 11, 2025 · As a micro-framework, Flask lets you build web services with very little overhead. It offers freedom for you, the designer, to implement your project in a way that suits your particular …