Features/Python 3.3

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(Current status)
(Current status: 100% (https://admin.fedoraproject.org/updates/FEDORA-2012-15663/python-networkx-1.7-1.fc18 pushed to stable))
 
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== Current status ==
 
== Current status ==
 
* Targeted release: [[Releases/18 | Fedora 18 ]]  
 
* Targeted release: [[Releases/18 | Fedora 18 ]]  
* Last updated: 2012-08-04
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* Last updated: 2012-10-15
* Percentage of completion: 80% (see detailed notes under "Scope" below and in [[Talk:Features/Python_3.3]])
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* Percentage of completion: 100% (see detailed notes under "Scope" below and in [[Talk:Features/Python_3.3]])
** Done: Successful mock rebuilds of the core python3 package for Python 3.3 (with full test suite)
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** Done: Successful mock rebuilds of the core python3 package for Python 3.3 (with full test suite) and of 95 add-on packages
** Done: 95 add-on packages successfully rebuild in mock environment
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** Done: python 3.3.0 beta 1 built "for real" in Koji
** TODO: fix remaining 13 packages so they rebuild in mock environment
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** Done: 103 add-on packages successfully rebuilt in Koji against 3.3.0 beta 1
** Done: python3.3b1 built "for real" in Koji
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** Done: python 3.3.0 beta 2 built into Koji
** Done: 93 add-on packages successfully rebuilt in Koji
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** Done: python 3.3.0 rc1 built into Koji
** TODO: 14 remaining packages to be built in Koji
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** Done: python 3.3.0 rc2 built into Koji
** TODO: build further releases of 3.3 into Koji
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** Done: python 3.3.0 rc3 built into Koji
** TODO: testing
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** Done: python 3.3.0 built into Koji and pushed into the tree as https://admin.fedoraproject.org/updates/FEDORA-2012-15111/python3-3.3.0-1.fc18
 
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** Done: update rpmlint to check for Python 3.3 bytecode: https://bugzilla.redhat.com/show_bug.cgi?id=845972
Upstream is at feature freeze for 3.3; latest tarball release is Python 3.3.0 beta 1, released on June 27th, 2012.
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{|
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! Month !! [http://www.python.org/dev/peps/pep-0398/ Python 3.3 release schedule]) !! Fedora 18 Schedule !! Fedora 19 Schedule
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|-
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| March || 3.3.0 alpha 1: March 3, 2012  || ||
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|-
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| || 3.3.0 alpha 2: March 31, 2012 || ||
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|-
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| April || 3.3.0 alpha 3: April 28, 2012 || ||
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|-
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| May || 3.3.0 alpha 4: May 26, 2012  || Start Feature Submission Wed 2012-05-02 ||
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|-
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| June || 3.3.0 beta 1: June 23, 2012: (No new features beyond this point.) || ||
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|-
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| July || 3.3.0 beta 2: July 14, 2012  || ||
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|-
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| ||  || Feature Submission Deadline Tue 2012-07-24  ||
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|-
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| || 3.3.0 candidate 1: July 28, 2012  || ||
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|-
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| ||  || Feature Freeze (Testable/Complete) Tue 2012-08-07  ||
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|-
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| ||  || Branch Fedora 18 from Rawhide Tue 2012-08-07 ||
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|-
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| August || || 2012-08-14 Alpha Change Deadline ||
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|-
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| || 3.3.0 candidate 2: August 11, 2012  || ||
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|-
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| || || 2012-08-28 Alpha Release ||
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|-
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| || 3.3.0 final: August 18, 2012  || ||
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|-
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| September || || 2012-09-18 Beta Change Deadline / Features 100% Complete ||
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|}
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Note: Fedora 18 schedule above is based on [[Releases/18/Schedule]] as 2012-07-19
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== Detailed Description ==
 
== Detailed Description ==

Latest revision as of 18:03, 15 October 2012


Contents

[edit] Python 3.3

[edit] Summary

Update the Python 3 stack in Fedora from 3.2 to 3.3

[edit] Owner

  • Email: <dmalcolm@redhat.com>

[edit] Current status

  • Targeted release: Fedora 18
  • Last updated: 2012-10-15
  • Percentage of completion: 100% (see detailed notes under "Scope" below and in Talk:Features/Python_3.3)
    • Done: Successful mock rebuilds of the core python3 package for Python 3.3 (with full test suite) and of 95 add-on packages
    • Done: python 3.3.0 beta 1 built "for real" in Koji
    • Done: 103 add-on packages successfully rebuilt in Koji against 3.3.0 beta 1
    • Done: python 3.3.0 beta 2 built into Koji
    • Done: python 3.3.0 rc1 built into Koji
    • Done: python 3.3.0 rc2 built into Koji
    • Done: python 3.3.0 rc3 built into Koji
    • Done: python 3.3.0 built into Koji and pushed into the tree as https://admin.fedoraproject.org/updates/FEDORA-2012-15111/python3-3.3.0-1.fc18
    • Done: update rpmlint to check for Python 3.3 bytecode: https://bugzilla.redhat.com/show_bug.cgi?id=845972

[edit] Detailed Description

Python 3.3 adds numerous features and optimizations. See the upstream notes at http://www.python.org/getit/releases/3.3.0/ and http://docs.python.org/dev/whatsnew/3.3.html

[edit] Benefit to Fedora

Fedora aims to showcase the latest in free and open source software - we should have the most recent release of Python 3.

[edit] Scope

Compare with the Python 3.2 feature page.

We need to wait for Python 3.3 to reach feature freeze, so that the bytecode format for .pyc files is frozen, together with the ABI for extension modules.

At that point we can rebase python3 to the latest release candidate of that code. We would then need to rebuild all python 3 packages. See https://fedoraproject.org/wiki/Python3#Python_3_already_in_Fedora

For bonus points, we ought to tell "file" and "rpmlint" about the new bytecode format for .pyc files.

Note that the suffix of some files should change, and this may require slight packaging tweaks in the various packages that ship Python 3 code:

  • bytecode files changing from .cpython-32.pyc (and .cpython-32.pyo) to .cpython-33.pyc (and .cpython-32.pyo)
  • extension modules changing from .cpython-32mu.so to .cpython-33m.so (the "u" part goes away as part of PEP 393).

There have been some C API changes (especially relating to unicode handling); if we're unlucky we may need to do some code patching to get some extension modules to compile.

Detailed notes on the extent of the rebuild and the current status can be seen in Talk:Features/Python_3.3

[edit] How To Test

Interested testers do not need special hardware. If you have a favorite Python 3 script, module, or application, please test it with Python 3.3 and verify that it still works as you expect.

My own test plan:

  • Smoketest of the interpreter
  • Run the upstream regression test suite (this is done during %check)

[edit] User Experience

Users should not notice any difference, other than the availability of the 3.3 interpreter

[edit] Dependencies

See notes in "Scope" above.

[edit] Contingency Plan

I'm working on test rebuilds of all affected packages, using skvidal's mockchain tool (this also gives us a build ordering, by grepping the logs).

I plan to commit any proposed changes to "python3.3" branches of dist-git, and then merge to master when we do it for real.

This pre-planning should mean everything is ready and any major issues should have been shaken out before we "pull the trigger" and commit/build for real into f18.

[edit] Documentation

What's New In Python 3.3

[edit] Release Notes

The system Python 3 stack has been upgraded to 3.3 (the system Python 2 stack remains at 2.7), bringing in hundreds of fixes and tweaks; for a list of changes see http://docs.python.org/dev/whatsnew/3.3.html

[edit] Comments and Discussion