Skip to main content

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.

Release files for Flask 3.0.2

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 3.0.2
File Size Uploaded
flask-3.0.2.tar.gz 675.2 kB Details

Built distribution (wheel)

Table of built distributions (wheels) for Flask 3.0.2
File Interpreter ABI Platform
flask-3.0.2-py3-none-any.whl Python 3 none any Details

Total release size: 776.5 kB

Release files / flask-3.0.2.tar.gz

Download URL flask-3.0.2.tar.gz
Size 675.2 kB
Tags Source
SHA-256 checksum
How to use checksums
822c03f4b799204250a7ee84b1eddc40665395333973dfb9deebfe425fefcb7d
BLAKE2b-256 checksum
How to use checksums
3fe0a89e8120faea1edbfca1a9b171cff7f2bf62ec860bbafcb2c2387c0317be
Upload date
Uploaded using Trusted Publishing?
What is trusted publishing?
Yes
Uploaded via twine/4.0.2 CPython/3.11.7

Release files / flask-3.0.2-py3-none-any.whl

Download URL flask-3.0.2-py3-none-any.whl
Size 101.3 kB
Tags Python 3
SHA-256 checksum
How to use checksums
3232e0e9c850d781933cf0207523d1ece087eb8d87b23777ae38456e2fbe7c6e
BLAKE2b-256 checksum
How to use checksums
93a6aa98bfe0eb9b8b15d36cdfd03c8ca86a03968a87f27ce224fb4f766acb23
Upload date
Uploaded using Trusted Publishing?
What is trusted publishing?
Yes
Uploaded via twine/4.0.2 CPython/3.11.7

Release history Release notifications | RSS feed

3.1.3

2 release files

3.1.2

2 release files

3.1.1

2 release files

3.1.0

2 release files

3.0.3

2 release files

This release

3.0.2 This release

2 release files

3.0.1

2 release files

3.0.0

2 release files

2.3.3

2 release files

2.3.2

2 release files

2.3.1

2 release files

2.3.0

2 release files

2.2.5

2 release files

2.2.4

2 release files

2.2.3

2 release files

2.2.2

2 release files

2.2.1

2 release files

2.2.0

2 release files

2.1.3

2 release files

2.1.2

2 release files

2.1.1

2 release files

2.1.0

2 release files

2.0.3

2 release files

2.0.2

2 release files

2.0.1

2 release files

2.0.0

2 release files

1.1.4

2 release files

1.1.3

2 release files

1.1.2

2 release files

1.1.1

2 release files

1.1.0

2 release files

1.0.4

2 release files

1.0.3

2 release files

1.0.2

2 release files

1.0.1

2 release files

1.0

2 release files

0.12.5

2 release files

0.12.4

2 release files

0.12.3

2 release files

0.12.2

2 release files

0.12.1

2 release files

0.12

2 release files

0.11

2 release files

0.10.1

1 release file

0.10

1 release file

0.9

1 release file

0.8.1

1 release file

0.8

1 release file

0.7.2

1 release file

0.7.1

1 release file

0.7

1 release file

0.6.1

1 release file

0.6

1 release file

0.5.2

1 release file

0.5.1

1 release file

0.5

1 release file

0.4

1 release file

0.3.1

1 release file

0.3

1 release file

0.2

1 release file

0.1

1 release file

Anthropic, PBC Visionary sponsor Bloomberg Visionary sponsor Hudson River Trading Visionary sponsor Meta Visionary sponsor NVIDIA Visionary sponsor Microsoft Sustainability sponsor Depot Continuous Integration AWS Cloud computing and Security Sponsor Datadog Monitoring Fastly CDN Google Download Analytics Sentry Error logging StatusPage Status page