Byline:

The Python micro framework for building web applications

Key links

Flask is a lightweight WSGI web application framework. It is designed to make getting started quick and easy, with the ability to scale up to complex applications. It began as a simple wrapper around Werkzeug and Jinja and has become one of the most popular Python web application frameworks.

Install

$ pip install flask

Hello World

  • app.py 
      from flask import Flask


  app = Flask(__name__)


  @app.route("/")
  def hello():
      return "Hello, World!"

$ flask run
  * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)