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Bug#936604: FYI: Python 3 migration of distributuion

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  Bug#936604: FYI: Python 3 migration of distributuion Osamu Aoki <osamu@debian.org> - 2019-11-13 16:30 +0100
    Re: FYI: Python 3 migration of distributuion Charles Cazabon <search-web-for-address@pyropus.ca> - 2019-11-13 18:40 +0100

#12070 — Bug#936604: FYI: Python 3 migration of distributuion

Hi,

This is just FYI on situation.

Currently, getmail is a candidate for removal from the upcoming Debian
release if it is not updated to support python 3 by someone (not
necessary by upstream).

Here is the background ....

Debian and Ubuntu are pushing to remove python2 in next 2020 release.
  https://wiki.debian.org/Python/2Removal
  https://lists.ubuntu.com/archives/ubuntu-devel/2019-November/040842.html

You can see its progress for Debian at:
  http://sandrotosi.me/debian/py2removal/py2removal_progress.png
They converted packages to support python3 for almost the half of the
problematic python2 packages in 3 months.  With this pace, they think
they can remove python2.

Ubuntu also has list:
  https://people.canonical.com/~ubuntu-archive/transitions/html/python2-rm.html

Some migration activities were implemented by Debian maintainers
patching the upstream package without upstream help.  So something like
that may happen on getmail if some other Debian developers take actions.
(I, for one, will not do this considering getmail being a security
sensitive mail application and needs upstream support of python3 code.)

Please also note Fedora seems to be doing the similar:
  https://pagure.io/releng/issue/8221
  https://fedoraproject.org/wiki/Changes/F31_Mass_Python_2_Package_Removal

Please don't expect some major distros to be supporting python2 after 2020.

If you convert python 2 code for 2.7 style, then we can support both
python 2 and 3.  If some code needs to be made compatible with pre=2.7
version, may be making that section of code conditional to python
version may accommodate it without causing python 3 compatibility
problem.

If you update package to support python 3, I will upload it to Debian.

Regards,

Osamu

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#12072 — Re: FYI: Python 3 migration of distributuion

Osamu Aoki <osamu@debian.org> wrote:
> 
> Currently, getmail is a candidate for removal from the upcoming Debian
> release if it is not updated to support python 3 by someone (not
> necessary by upstream).

Thanks for the update, Osamu.  I have actually been playing with a prototype
refactoring of getmail to not just support but require a recent Python 3.x
version.  Such a project would give me the opportunity to remove a lot of
historical cruft and backwards-compatibility code that getmail has accumulated
over 20+ years.

Unfortunately, it's difficult to find the hours to devote to this task.  I
don't know when, or even if, I could have a beta release ready.

> If you convert python 2 code for 2.7 style, then we can support both
> python 2 and 3.

I'm not very interested in doing this, as it means not using a lot of 3.x
features, or not using them in the most Pythonic way.  My thought was that
this project would target at least Python 3.7; anyone who didn't want to run
3.7 could still run "legacy" getmail under Python 2.7.

Charles
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Charles Cazabon
GPL'ed software available at:               http://pyropus.ca/software/
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