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[Python-Dev] Do PEP 526 type declarations define the types of variables or not?

Ivan Levkivskyi levkivskyi at gmail.com
Tue Sep 6 12:42:31 EDT 2016 
On 6 September 2016 at 18:35, Nick Coghlan <ncoghlan at gmail.com> wrote:

> On 7 September 2016 at 01:33, Ivan Levkivskyi <levkivskyi at gmail.com>
> wrote:
> > On 6 September 2016 at 17:25, Mark Shannon <mark at hotpy.org> wrote:
> >>
> >> The issue is not whether the checker can tell that the type of the
> >> *expression* is int, but whether it is forced to use the type of the
> >> *variable*. The current wording of PEP 526 strongly implies the latter.
> >
> > Mark,
> > Could you please point to exact locations in the PEP text and propose an
> > alternative wording, so that we will have a more concrete discussion.
>
> Rather than trying to work that out on the list, it may make the most
> sense for Mark to put together a PR that rewords the parts of the PEP
> that he sees as constraining typecheckers to restrict *usage* of a
> variable based on its annotation, rather than just restricting future
> bindings to it.
>

Thanks Nick, this is a good idea.
Mark, I will be glad to discuss your PR to the master python/peps repo.

--
Iavn
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