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Re: Maintaining a backported module

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From Ben Finney <ben+python@benfinney.id.au>
Subject Re: Maintaining a backported module
Date Thu, 24 Oct 2013 16:09:55 +1100
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Steven D'Aprano <steve@pearwood.info> writes:

> I'm now at the point where I wish to backport this module to support
> versions of Python back to 3.1 at least and possibly 2.7, and put it
> up on PyPI.
>
> I'm looking for advice on best practices for doing so. Any suggestions 
> for managing bug fixes and enhancements to two separate code-bases 
> without them diverging too much?

It is a great advantage that you've targeted Python 3 primarily. As I
understand it, it is far easier to make an existing Python 3 code base
also work on Python 2, than vice versa.

(Though that will obviously change as Python 3 continues to diverge from
Python 2. The more one depends on Python 3 features, the more one
depends on back-ported versions of those features for Python 2.

I'm pretty sure that's not going to be much of an issue for the
‘statistics’ package, but it's worth mentioning as a general caveat.)

> Other than "Avoid it" :-)

A useful library for this purpose is ‘six’ (as in “3 × 2”)
<URL:http://pythonhosted.org/six/>. You can use its features to do
things that are useful or better in Python 3, but which need special
implementation to work on Python 2; and the same code will just work on
both versions.

-- 
 \         “Pinky, are you pondering what I'm pondering?” “I think so, |
  `\    Brain, but if we get Sam Spade, we'll never have any puppies.” |
_o__)                                           —_Pinky and The Brain_ |
Ben Finney

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Thread

Maintaining a backported module Steven D'Aprano <steve@pearwood.info> - 2013-10-24 04:54 +0000
  Re: Maintaining a backported module Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 16:09 +1100
    Re: Maintaining a backported module Metallicow <metaliobovinus@gmail.com> - 2013-10-23 22:46 -0700
      Re: Maintaining a backported module Metallicow <metaliobovinus@gmail.com> - 2013-10-30 03:32 -0700
  Re: Maintaining a backported module Paul Rubin <no.email@nospam.invalid> - 2013-10-23 22:38 -0700
  Re: Maintaining a backported module Ethan Furman <ethan@stoneleaf.us> - 2013-10-23 23:30 -0700
  Re: Maintaining a backported module Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 17:59 +1100
    Re: Maintaining a backported module Steven D'Aprano <steve@pearwood.info> - 2013-10-24 09:38 +0000
      Re: Maintaining a backported module Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 21:01 +1100
  Re: Maintaining a backported module Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2013-10-24 09:00 +0200
  Re: Maintaining a backported module Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-10-24 09:37 +0100
  Re: Maintaining a backported module Ned Batchelder <ned@nedbatchelder.com> - 2013-10-24 06:36 -0400
    Re: Maintaining a backported module Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-10-24 11:46 +0000
      Re: Maintaining a backported module rusi <rustompmody@gmail.com> - 2013-10-24 05:25 -0700
      Re: Maintaining a backported module Ned Batchelder <ned@nedbatchelder.com> - 2013-10-24 13:46 -0400
      Re: Maintaining a backported module Terry Reedy <tjreedy@udel.edu> - 2013-10-24 16:37 -0400
      Python Coverage: testing a program (was: Maintaining a backported module) Ben Finney <ben+python@benfinney.id.au> - 2013-10-25 07:54 +1100
      Re: Python Coverage: testing a program Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-10-24 22:55 +0100
      Re: Python Coverage: testing a program Terry Reedy <tjreedy@udel.edu> - 2013-10-24 18:36 -0400
      Re: Python Coverage: testing a program Ethan Furman <ethan@stoneleaf.us> - 2013-10-24 15:28 -0700
      Re: Python Coverage: testing a program Ben Finney <ben+python@benfinney.id.au> - 2013-10-25 10:27 +1100
      Re: Python Coverage: testing a program Ben Finney <ben+python@benfinney.id.au> - 2013-10-25 10:30 +1100
      Re: Python Coverage: testing a program Ned Batchelder <ned@nedbatchelder.com> - 2013-10-24 19:53 -0400
      Re: Python Coverage: testing a program Terry Reedy <tjreedy@udel.edu> - 2013-10-24 19:55 -0400
      Re: Maintaining a backported module Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-10-25 08:49 +0100
  Re: Maintaining a backported module Christian Heimes <christian@python.org> - 2013-10-24 12:47 +0200
  Re: Maintaining a backported module Ethan Furman <ethan@stoneleaf.us> - 2013-10-24 12:42 -0700

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