From Fedora Project Wiki
 
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<!-- The actual name of your proposed change page should look something like: Changes/Your_Change_Proposal_Name.  This keeps all change proposals in the same namespace -->
 
<!-- The actual name of your proposed change page should look something like: Changes/Your_Change_Proposal_Name.  This keeps all change proposals in the same namespace -->
= Change Proposal Name <!-- The name of your change proposal --> =
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= Python 3.6 <!-- The name of your change proposal --> =
  
 
== Summary ==
 
== Summary ==
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CLOSED as NEXTRELEASE -> change is completed and verified and will be delivered in next release under development
 
CLOSED as NEXTRELEASE -> change is completed and verified and will be delivered in next release under development
 
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* Tracker bug: <will be assigned by the Wrangler>
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* Tracker bug: [https://bugzilla.redhat.com/show_bug.cgi?id=1373132 #1373132]
  
 
== Detailed Description ==
 
== Detailed Description ==
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[https://www.python.org/dev/peps/pep-0494/#schedule Release Milestones for Python 3.6]
 
[https://www.python.org/dev/peps/pep-0494/#schedule Release Milestones for Python 3.6]
  
There is already a copr repo with the third alpha of Python 3.6 (Python-3.6.0a3) which can be enabled by:  dnf copr enable cstratak/python-3.6  
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There is already a copr repo with the second beta of Python 3.6 (Python-3.6.0b2) which can be enabled by:  dnf copr enable cstratak/python3.6  
 
* Other developers:
 
* Other developers:
 
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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<!-- Does this feature require coordination with release engineering (e.g. changes to installer image generation or update package delivery)?  Is a mass rebuid required?  If a rel-eng ticket exists, add a link here.  
 
<!-- Does this feature require coordination with release engineering (e.g. changes to installer image generation or update package delivery)?  Is a mass rebuid required?  If a rel-eng ticket exists, add a link here.  
 
Please work with releng prior to feature submission, and ensure that someone is on board to do any process development work and testing; don't just assume that a bullet point in a change puts someone else on the hook.-->
 
Please work with releng prior to feature submission, and ensure that someone is on board to do any process development work and testing; don't just assume that a bullet point in a change puts someone else on the hook.-->
Packages will be rebuilt during mass rebuild. If there is no mass rebuild for whatever reason, a targeted mass rebuild for all python packages will be required.
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A targeted rebuild for all python packages will be required, before the mass rebuild.
  
 
* Policies and guidelines: None <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
* Policies and guidelines: None <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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* dnf update python3
 
* dnf update python3
  
This will update your system's python3 version to (currently) 3.6 third alpha
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This will update your system's python3 version to (currently) 3.6 second beta.
  
 
== User Experience ==
 
== User Experience ==
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<!-- If you cannot complete your feature by the final development freeze, what is the backup plan?  This might be as simple as "Revert the shipped configuration".  Or it might not (e.g. rebuilding a number of dependent packages).  If you feature is not completed in time we want to assure others that other parts of Fedora will not be in jeopardy.  -->
 
<!-- If you cannot complete your feature by the final development freeze, what is the backup plan?  This might be as simple as "Revert the shipped configuration".  Or it might not (e.g. rebuilding a number of dependent packages).  If you feature is not completed in time we want to assure others that other parts of Fedora will not be in jeopardy.  -->
* Contingency mechanism: Do not build Python 3.6 in koji  <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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* Contingency mechanism: Do not merge the side tag with rawhide. If the side tag has been merged and issues arise, that will justify a downgrade, then use an epoch tag to revert to 3.5.2 version<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
<!-- When is the last time the contingency mechanism can be put in place?  This will typically be the beta freeze. -->
 
<!-- When is the last time the contingency mechanism can be put in place?  This will typically be the beta freeze. -->
* Contingency deadline: TBD  <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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* Contingency deadline: TBD (sometime before the mass rebuild at 2017-02-01) <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
<!-- Does finishing this feature block the release, or can we ship with the feature in incomplete state? -->
 
<!-- Does finishing this feature block the release, or can we ship with the feature in incomplete state? -->
 
* Blocks release? No <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
* Blocks release? No <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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[https://docs.python.org/3.6/whatsnew/changelog.html#python-3-6-0-alpha-3 Python 3.6.0a3 Changelog]
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[https://docs.python.org/3.6/whatsnew/changelog.html#python-3-6-0-beta-2 Python 3.6.0b2 Changelog]
  
[[Category:ChangeReadyForWrangler]]
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[[Category:ChangeAcceptedF26]]
 
<!-- When your change proposal page is completed and ready for review and announcement -->
 
<!-- When your change proposal page is completed and ready for review and announcement -->
 
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Latest revision as of 13:25, 24 November 2016


Python 3.6

Summary

Update the Python 3 stack in Fedora from Python 3.5 to Python 3.6.

Owner

  • Email: python-maint@redhat.com
  • Release notes owner:

Current status

Detailed Description

Python 3.6 adds numerous features and optimizations. See the upstream notes at Features for 3.6 and What's new in 3.6.

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.

Scope

  • Proposal owners:

All the downstream patches will need to be reviewed and then rebased or dropped accordingly. Since some patches are arch specific, they will need to be reviewed for their respective architecture.

Most of the python packages requiring Python 3, should be compatible with Python 3.6. Some incompatible changes and how to port code to Python 3.6 can be seen here: Porting to Python 3.6

Currently there are 1500 packages in Fedora 26 that either BuildRequires or Requires Python 3, and with the continuing porting efforts, the number gets higher every day.

After change is accepted, and a release candidate of Python 3.6 is available, it will be built for F26.

Release Milestones for Python 3.6

There is already a copr repo with the second beta of Python 3.6 (Python-3.6.0b2) which can be enabled by: dnf copr enable cstratak/python3.6

  • Other developers:

Owners of packages that fail to rebuild during the mass rebuild will be asked, using bugzilla, to fix or remove their packages from the distribution. If any issues appear, they should be solvable either by communicating with upstreams first and/or applying downstream patches. Also the package maintainers should have a look at: Porting to Python 3.6. And python-maint team will be available to help with fixing issues.

  • Release engineering:

A targeted rebuild for all python packages will be required, before the mass rebuild.

  • Policies and guidelines: None
  • Trademark approval: N/A (not needed for this Change)

Upgrade/compatibility impact

All the packages that depends on Python3 must be rebuild. User written Python 3 scripts/applications may require a small amount of porting, but mostly Python 3.5 is forward compatible with Python 3.6.

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 3.6 and verify that it still works as you expect.

How to get Python 3.6:

  • dnf copr enable cstratak/python-3.6
  • dnf update python3

This will update your system's python3 version to (currently) 3.6 second beta.

User Experience

Regular distro users shouldn't notice any change in system behavior other than the Python3 interpreter will be in version 3.6.

Dependencies

See scope section.

Contingency Plan

  • Contingency mechanism: Do not merge the side tag with rawhide. If the side tag has been merged and issues arise, that will justify a downgrade, then use an epoch tag to revert to 3.5.2 version
  • Contingency deadline: TBD (sometime before the mass rebuild at 2017-02-01)
  • Blocks release? No
  • Blocks product? No

Documentation

Features for 3.6

What's new in 3.6

Major Changes in Python 3.6

Porting to Python 3.6

Release Notes

Python 3.6.0b2 Changelog