On Thu, 25 Nov 2021 23:51:58 +0000
Oscar Benjamin <oscar.j.benja...@gmail.com> wrote:
> >
> > Not a PEP proponent (or even a typing user), but I thought this had
> > been made clear long ago.  My understanding is that optional,
> > incremental type hints are and have always been considered the primary
> > use case for annotations by the BDFL and AFAICT the SC following the
> > BDFL.  If compatibility with typing is an issue, then the burden of
> > implementing that is on the other application.  Typing *might* do
> > something to help, but it's not obligated to do so.  
> 
> This was not my understanding of annotations when they were introduced e.g.:
> https://www.python.org/dev/peps/pep-3107/#use-cases
> 
> As I remember it, a decision about the purpose of annotations was
> *explicitly* not made when they were introduced.

This is also what I remember from the discussions at the time of PEP
3107.  Annotations were purposefully use case-agnostic, and there was
no stated desire to push for one use case or another.  I don't think
gradual typing was even on the radar, not in public comments anyway.

Regards

Antoine.


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