[all][tc] Thoughts on Python 3.7 support
dtantsur at redhat.com
Wed Jan 6 10:34:03 UTC 2021
On Tue, Jan 5, 2021 at 10:53 PM Jeremy Stanley <fungi at yuggoth.org> wrote:
> On 2021-01-05 22:32:58 +0100 (+0100), Pierre Riteau wrote:
> > There have been many patches submitted to drop the Python 3.7
> > classifier from setup.cfg:
> > https://review.opendev.org/q/%2522remove+py37%2522
> > The justification is that Wallaby tested runtimes only include 3.6 and
> > Most projects are merging these patches, but I've seen a couple of
> > objections from ironic and horizon:
> > - https://review.opendev.org/c/openstack/python-ironicclient/+/769044
> > - https://review.opendev.org/c/openstack/horizon/+/769237
> > What are the thoughts of the TC and of the overall community on this?
> > Should we really drop these classifiers when there are no
> > corresponding CI jobs, even though more Python versions may well be
> > supported?
> My recollection of the many discussions we held was that the runtime
> document would recommend the default python3 available in our
> targeted platforms, but that we would also make a best effort to
> test with the latest python3 available to us at the start of the
> cycle as well. It was suggested more than once that we should test
> all minor versions in between, but this was ruled out based on the
> additional CI resources it would consume for minimal gain. Instead
> we deemed that testing our target version and the latest available
> would give us sufficient confidence that, if those worked, the
> versions in between them were likely fine as well. Based on that, I
> think the versions projects claim to work with should be contiguous
> ranges, not contiguous lists of the exact versions tested (noting
> that those aren't particularly *exact* versions to begin with).
This is precisely my expectation: if we support 3.6 and 3.8, it's
reasonable to suggest we support 3.7. Not supporting it gains us nothing.
> Apologies for the lack of references to old discussions, I can
> probably dig some up from the ML and TC meetings several years back
> of folks think it will help inform this further.
> Jeremy Stanley
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