I would also be for bumping the minimum python version to 3.9+ for Airflow
3.1 unless
there is some objection to this one.
Maybe we should add this as a discussion item for the Airflow dev call?
Thanks & Regards,
Amogh Desai
On Thu, May 8, 2025 at 11:09 AM Jarek Potiuk <ja...@potiuk.com> wrote:
> I would be for it if that makes things easier. We could drop Python 3.9 for
> airflow 3.1+
>
> On Wed, May 7, 2025 at 10:01 PM Jens Scheffler <j_scheff...@gmx.de.invalid
> >
> wrote:
>
> > Hi Avi, all,
> >
> > we had a bit of a discussion about this and don't know if this is very
> > controversal... but: Python 3.9 will run out of support in September.
> > How about if we drop support early in 3.1 so that we migrate main to
> > 3.10 and by this remove the deadlock?
> >
> > Jens
> >
> > On 07.05.25 16:48, Abhishek Bhakat wrote:
> > > Hi All,
> > >
> > > I've hit a little deadlock.
> > >
> > > We want to use SQLAlchemy 2.x ORM typing (Mapped[...] =
> > > mapped_column(...)) with
> > > PEP 604 union types (int | None) in model annotations and must support
> > > Python 3.9 (which does not support int | None at runtime).
> > >
> > > We do not want to use Optional[...] (ruff UP007 is enforced). And, we
> > > already have from __future__ import annotations everywhere. And getting
> > > error like:
> > >
> > > sqlalchemy.orm.exc.MappedAnnotationError: Could not resolve all types
> > within
> > > mapped annotation: "Mapped[int | None]"
> > >
> > > TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'
> > >
> > > mypy/ruff are not happy with Mapped[Optional[int]] (*ruff UP007*), and
> > > SQLAlchemy 2.x cannot parse Mapped[int | None] on Python 3.9.
> > >
> > > With from __future__ import annotations, SQLAlchemy stores the
> annotation
> > > as a string. At runtime, it tries to eval() the string in the module's
> > > namespace. On Python 3.9, eval("int | None") fails.
> > >
> > > Need help and suggestion on how shall I proceed?
> > >
> > > Thanks,
> > >
> > > Avi
> > >
> >
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>
