Flask

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.

Flask offers suggestions, but doesn’t enforce any dependencies or project layout. It is up to the developer to choose the tools and libraries they want to use. There are many extensions provided by the community that make adding new functionality easy.

Installing

Install and update using pip:

$ pip install -U Flask

A Simple Example

# save this as 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)

Contributing

For guidance on setting up a development environment and how to make a contribution to Flask, see the contributing guidelines.

Donate

The Pallets organization develops and supports Flask and the libraries it uses. In order to grow the community of contributors and users, and allow the maintainers to devote more time to the projects, please donate today.

Metadata

Release files for Flask 2.3.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for Flask 2.3.0
File	Size	Uploaded
Flask-2.3.0.tar.gz	686.3 kB	Apr 25, 2023	Details

Built distribution (wheel)

Table of built distributions (wheels) for Flask 2.3.0
File	Interpreter	ABI	Platform	Reset
Flask-2.3.0-py3-none-any.whl 97.0 kB Apr 25, 2023	Python 3	none	any	Details

Total release size: 783.2 kB

Release files / Flask-2.3.0.tar.gz

Download URL	Flask-2.3.0.tar.gz
Size	686.3 kB
Tags	Source
SHA-256 checksum How to use checksums	`4088b4986f13cae23e02081e67df7e4e434ec6f85a5238bce5e6db6d1de61e06`
BLAKE2b-256 checksum How to use checksums	`04f422384e109d9b7e295b20580bc6af5f45b78730d03f41f826639a5c006d1a`
Upload date	Apr 25, 2023
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/4.0.1 CPython/3.11.3`

Release files / Flask-2.3.0-py3-none-any.whl

Download URL	Flask-2.3.0-py3-none-any.whl
Size	97.0 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`99a4889167c86fe57c4036825ebc77dc5dc3241bf0d80ea80ca941587d0d6a52`
BLAKE2b-256 checksum How to use checksums	`24dd45df0b0b93f449cb217486136071294595b2d6f8840eaf38704773093a37`
Upload date	Apr 25, 2023
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/4.0.1 CPython/3.11.3`