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From: Scott Talbert <swt@techie.net>
Newsgroups: linux.debian.maint.python
Subject: Re: Removing python2 packages
Date: Wed, 24 Jul 2019 20:50:02 +0200
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On Wed, 24 Jul 2019, Neil Williams wrote:

>>> napsal: When removing leaf python2 packages for bullseye, is there
>>>       anything
>>>
>>>
>>> __modules__ package :)
>>>  
>>>       special that needs to be done, other than removing the
>>> building of the
>>>       python2 subpackage?
>>>
>>>       For example, obsoleting of the old package or anything along
>>>       those lines?
>>>
>>>
>>> * check reverse-depends and "reverse-depends -b"
>>> * remove from d/control
>>> * remove from d/tests
>>> * remove from d/rules
>>> * check/remove d/python-* files
>>> * test
>>> * upload
>>
>> Thanks.  The reason I asked about 'obsoleting' is because I wondered
>> about what will happen on the upgrade case.  Say, I remove python-foo
>> from bullseye.  When a user running buster with python-foo installed
>> upgrades to bullseye, what will happen?  Will apt try to remove
>> python-foo?
>
> Not unless something actually Breaks: or Conflicts: or the user runs
> autoremove.
>
> If a leaf package bar changes from Depends: python-foo to python3-foo,
> then python-foo will remain installed. There are lots of packages in
> Stretch that are not in Buster. Upgrading leaves them in place unless
> there is something which actively Conflicts: or Breaks: them. That's
> why autoremove is so useful after dist-upgrade.

Assuming python 2 is removed from bullseye, upon an upgrade from buster to 
bullseye, I guess we are assuming python 2 would remain installed on 
upgraded systems?

Scott
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