[Python.NET] Retiring Python 2.7

[Denis Akhiyarov]

It is possible to write code that targets both Python 2 and Python 3
runtimes and do testing while still using legacy Python 2 as the runtime in
production. There are plenty of tools and examples from large tech
companies to support the transition.

IMO: all efforts to support legacy Python 2 runtime in 2020 should be based
on commercial agreement in a separate "bug-fix only" branch due to the
effort to maintain both runtimes. For example, release one last Python 2.7
compatible version late 2019 on PYPI and keep that branch on GitHub. But
all backports from master branch to that legacy branch and releases of
Python 2 binaries/wheels to PYPI should be supported by commercial users.
Note that binaries for *Nix architectures is still not feasible with Mono
or .NET Core.

Thanks,
Denis



On Fri, Jun 14, 2019, 8:23 AM David Lassonde <
david.lassonde at imaginary-spaces.com> wrote:

> In our field (film/tv/games), pipelines are only using Python 2.7. Our
> customers, partners and us try to follow the vfx reference platform
> <https://vfxplatform.com/>. The table says that studios and vendors have
> until the end of CY 2020 to drop Python 2.7.
>
> It is too soon to tell if this will really happen that fast, because the
> transition will be hard, it will take time and money. Pixels will not look
> better after the investment.
>
> All that to say that for us, as long as there is a "last Python for .NET"
> GitHub release/tag, we will be fine. We can always fork the repo and fix
> bugs on our own, or merge to a special branch that you could keep open in
> the repo.
>
> David
>
> On Thu, Jun 13, 2019 at 6:31 PM Carl Trachte <ctrachte at gmail.com> wrote:
>
>> Same as Mr. Sachs.  I've left the job since, but we used pythonnet
>> with a python 2.7 distro.  As long as the current version is available
>> for download, the script can get done what it needs to where it is
>> deployed locally.
>>
>> Sorry for noise is this is not on topic.
>>
>>
>> On Thu, Jun 13, 2019 at 2:46 PM Jason Sachs <jmsachs at gmail.com> wrote:
>> >
>> > As long as I can still download Python.NET for Python 2.7, I don't care
>> about future development.
>> >
>> > My use case is a legacy Python 2.7 application that works with a data
>> acquisition system that has .NET drivers. I'm not currently developing it,
>> but we are still actively using it.
>> >
>> > On Thu, Jun 13, 2019 at 2:10 PM Victor “LOST” Milovanov <
>> lostfreeman at gmail.com> wrote:
>> >>
>> >> Python 2.7 end of life is set to Jan 1st 2020, which is just a bit
>> over 6 months now. https://pythonclock.org/ Major packages, like numpy
>> are planning to drop support too.
>> >>
>> >>
>> >>
>> >> I think we should have some kind of plan to retire Python 2.x support
>> in Python.NET.
>> >>
>> >>
>> >>
>> >> First of all, it would be good to know if there are anyone actually
>> using Python 2.7 via Python.NET, and what is your plan going forward past
>> EoL.
>> >>
>> >>
>> >>
>> >> Regards,
>> >>
>> >> Victor Milovanov
>> >>
>> >>
>> >>
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