Flask provides configuration and conventions, with sensible defaults, to get started. This section of the documentation explains the different parts of the Flask framework and how they can be used, …

Flask is now installed. Check out the Quickstart or go to the Documentation Overview.

Check out the Quickstart for an overview of what Flask can do, then dive into the docs to find out more. The tutorial only uses what’s provided by Flask and Python.

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 …

本部分文档将介绍 Flask 框架的各个组成部分，以及如何使用、定制和扩展它们。 除了 Flask 本身，还可以查找由社区维护的扩展，以添加更多功能。

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 …

Then follow the installation instructions to set up a Python virtual environment and install Flask for your project. The tutorial will assume you’re working from the flask-tutorial directory from now on.

Flask can be used to serve Single-Page Applications (SPA) by placing static files produced by your frontend framework in a subfolder inside of your project. You will also need to create a catch-all …

Flask leverages Jinja as its template engine. You are obviously free to use a different template engine, but you still have to install Jinja to run Flask itself.

These types of patterns may be a bit outside the scope of Flask itself, but Flask makes it easy to implement them. Some common patterns are collected in the following pages.