PEP 361 – Python 2.6 and 3.0 Release Schedule
- Neal Norwitz, Barry Warsaw
- 2.6, 3.0
This document describes the development and release schedule for Python 2.6 and 3.0. The schedule primarily concerns itself with PEP-sized items. Small features may be added up to and including the first beta release. Bugs may be fixed until the final release.
There will be at least two alpha releases, two beta releases, and one release candidate. The releases are planned for October 2008.
Python 2.6 is not only the next advancement in the Python 2 series, it is also a transitional release, helping developers begin to prepare their code for Python 3.0. As such, many features are being backported from Python 3.0 to 2.6. Thus, it makes sense to release both versions in at the same time. The precedence for this was set with the Python 1.6 and 2.0 release.
Until rc, we will be releasing Python 2.6 and 3.0 in lockstep, on a monthly release cycle. The releases will happen on the first Wednesday of every month through the beta testing cycle. Because Python 2.6 is ready sooner, and because we have outside deadlines we’d like to meet, we’ve decided to split the rc releases. Thus Python 2.6 final is currently planned to come out two weeks before Python 3.0 final.
Release Manager and Crew
- 2.6/3.0 Release Manager: Barry Warsaw
- Windows installers: Martin v. Loewis
- Mac installers: Ronald Oussoren
- Documentation: Georg Brandl
- RPMs: Sean Reifschneider
Python 3.0 is no longer being maintained for any purpose.
Python 2.6.9 is the final security-only source-only maintenance release of the Python 2.6 series. With its release on October 29, 2013, all official support for Python 2.6 has ended. Python 2.6 is no longer being maintained for any purpose.
- Feb 29 2008: Python 2.6a1 and 3.0a3 are released
- Apr 02 2008: Python 2.6a2 and 3.0a4 are released
- May 08 2008: Python 2.6a3 and 3.0a5 are released
- Jun 18 2008: Python 2.6b1 and 3.0b1 are released
- Jul 17 2008: Python 2.6b2 and 3.0b2 are released
- Aug 20 2008: Python 2.6b3 and 3.0b3 are released
- Sep 12 2008: Python 2.6rc1 is released
- Sep 17 2008: Python 2.6rc2 and 3.0rc1 released
- Oct 01 2008: Python 2.6 final released
- Nov 06 2008: Python 3.0rc2 released
- Nov 21 2008: Python 3.0rc3 released
- Dec 03 2008: Python 3.0 final released
- Dec 04 2008: Python 2.6.1 final released
- Apr 14 2009: Python 2.6.2 final released
- Oct 02 2009: Python 2.6.3 final released
- Oct 25 2009: Python 2.6.4 final released
- Mar 19 2010: Python 2.6.5 final released
- Aug 24 2010: Python 2.6.6 final released
- Jun 03 2011: Python 2.6.7 final released (security-only)
- Apr 10 2012: Python 2.6.8 final released (security-only)
- Oct 29 2013: Python 2.6.9 final released (security-only)
Completed features for 3.0
See PEP 3000 and PEP 3100 for details on the Python 3.0 project.
Completed features for 2.6
- PEP 352: Raising a string exception now triggers a
TypeError. Attempting to catch a string exception raises
BaseException.messagehas been deprecated.
- PEP 358: The “bytes” Object
- PEP 366: Main module explicit relative imports
- PEP 370: Per user site-packages directory
- PEP 3112: Bytes literals in Python 3000
- PEP 3127: Integer Literal Support and Syntax
- PEP 371: Addition of the multiprocessing package
New modules in the standard library:
- new enhanced
Deprecated modules and functions in the standard library:
Modules removed from the standard library:
Warnings for features removed in Py3k:
- backticks and
- float args to
coerceand all its friends
- comparing by default comparison
- softspace removal for
- removal of modules because of PEP 4/PEP 3100/PEP 3108
Other major features:
aswill be keywords
__dir__()special method to control
dir()was added 
- AtheOS support stopped.
warningsmodule implemented in C
compile()takes an AST and can convert to byte code
Possible features for 2.6
New features should be implemented prior to alpha2, particularly any C modifications or behavioral changes. New features must be implemented prior to beta1 or will require Release Manager approval.
The following PEPs are being worked on for inclusion in 2.6: None.
Each non-trivial feature listed here that is not a PEP must be discussed on python-dev. Other enhancements include:
distutilsreplacement (requires a PEP)
New modules in the standard library:
winerrorhttps://bugs.python.org/issue1505257 (Patch rejected, module should be written in C)
setuptoolsBDFL pronouncement for inclusion in 2.5: https://mail.python.org/pipermail/python-dev/2006-April/063964.html
PJE’s withdrawal from 2.5 for inclusion in 2.6: https://mail.python.org/pipermail/python-dev/2006-April/064145.html
Modules to gain a DeprecationWarning (as specified for Python 2.6 or through negligence):
compilerpackage (or a Py3K warning instead?)
Parser/*.cto use the C
warningsmodule rather than
- Add warnings for Py3k features removed:
- float args to
- other comparison changes?
- int division?
zip()result as a list
execstatement (use function syntax)
- function attributes that start with
Lsuffix for long literals
- renaming of
- multiple inheritance with classic classes? (MRO might change)
- properties and classic classes? (instance attrs shadow property)
__bool__method if available and there’s no
- Check the various bits of code in
Tools/all still work, update or remove the ones that don’t.
- All modules in
Modules/should be updated to be
- All of Python (including
Modules/) should compile cleanly with g++
- Start removing deprecated features and generally moving towards Py3k
- Replace all old style tests (operate on import) with
- Add tests for all untested modules
- Document undocumented modules/features
- pure python
pgenmodule (Owner: Guido) Deferral to 2.6: https://mail.python.org/pipermail/python-dev/2006-April/064528.html
- Remove the
Deferred until 2.7
How should import warnings be handled?
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Last modified: 2023-09-09 17:39:29 GMT