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PyPI · #196 most downloaded on PyPI
A simple framework for building complex web applications.
Last release 7 months ago
19 Feb 2026
Ships fairly regularly
a new release about every 4 months
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
16 years old
64 releases · first in 2010
Fixed a error reporting bug with Config.from_envvar.
Released 2010-05-28
Fixed a error reporting bug with Config.from_envvar.
Removed some unused code.
Release does no longer include development leftover files (.git folder for themes, built documentation in zip and pdf file and some .pyc files)
Released 2010-05-28, codename Schnaps
Released 2010-05-28, codename Schnaps
Added support for categories for flashed messages.
The application now configures a logging.Handler and will log request handling exceptions to that logger when not in debug mode. This makes it possible to receive mails on server errors for example.
Added support for context binding that does not require the use of the with statement for playing in the console.
The request context is now available within the with statement making it possible to further push the request context or pop it.
Added support for configurations.
One column per quarter.
Released 2010-05-12, codename Jägermeister
Released 2010-05-12, codename Jägermeister
Various bugfixes
Integrated JSON support
Added get_template_attribute helper function.
Flask.add_url_rule can now also register a view function.
Refactored internal request dispatching.
Server listens on 127.0.0.1 by default now to fix issues with chrome.
Added external URL support.
Added support for send_file.
Module support and internal request handling refactoring to better support pluggable applications.
Sessions can be set to be permanent now on a per-session basis.
Better error reporting on missing secret keys.
Added support for Google Appengine.
Released 2010-04-16 - First public preview release.
Released 2010-04-16
First public preview release.
Released 2010-04-16
First public preview release.
Changes
Version 3.1.3
Version 3.1.2
Version 3.1.1
Version 3.1.0
Version 3.0.3
Version 3.0.2
Version 3.0.1
Version 3.0.0
Version 2.3.3
Version 2.3.2
Version 2.3.1
Version 2.3.0
Version 2.2.5
Version 2.2.4
Version 2.2.3
Version 2.2.2
Version 2.2.1
Version 2.2.0
Version 2.1.3
Version 2.1.2
Version 2.1.1
Version 2.1.0
Version 2.0.3
Version 2.0.2
Version 2.0.1
Version 2.0.0
Version 1.1.4
Version 1.1.3
Version 1.1.2
Version 1.1.1
Version 1.1.0
Version 1.0.4
Version 1.0.3
Version 1.0.2
Version 1.0.1
Version 1.0
Version 0.12.5
Version 0.12.4
Version 0.12.3
Version 0.12.2
Version 0.12.1
Version 0.12
Version 0.11.1
Version 0.11
Version 0.10.1
Version 0.10
Version 0.9
Version 0.8.1
Version 0.8
Version 0.7.2
Version 0.7.1
Version 0.7
Version 0.6.1
Version 0.6
Version 0.5.2
Version 0.5.1
Version 0.5
Version 0.4
Version 0.3.1
Version 0.3
Version 0.2
Version 0.1
© Copyright 2010 Pallets. Created using Sphinx 8.2.3.
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