bug#46610: Interactive mode tagging for python.el navigation functions

[Dmitry Gutov <dgutov@yandex.ru>]

On 18.02.2021 21:47, Eli Zaretskii wrote:
>> Cc: ddavis@ddavis.io, larsi@gnus.org, 46610@debbugs.gnu.org,
>>   monnier@iro.umontreal.ca
>> From: Dmitry Gutov <dgutov@yandex.ru>
>> Date: Thu, 18 Feb 2021 19:54:06 +0200
>>
>>> My question is more of the conceptual kind, not necessarily about this
>>> specific change.  Your original response was also about the principle,
>>> AFAIU.
>>
>> I guess I'm not sure what you are asking about at this point
> 
> Let me repeat my original question:

Very good.

>> So packages on ELPA are allowed to be ahead of those in core, but not
>> vice versa?  Is that really the intent that we allow them to diverge,
>> but only in one direction?
> 
>> yes, python.el is allowed to incorporate support for some new
>> features from Emacs 28, as long as they are backward-compatible, or
>> gated behind a version check.
> 
> If python.el in emacs.git is allowed to be different from that in
> elpa.git (and AFAIU we already allow that), then there should be no
> need for any compatibility shims in the version that is in emacs.git.

Then this part of my first reply should be most pertinent:

     Then we (someone? who?) either have to maintain both versions

Emphasis on "who".