As someone who has a very big research interest in type theory, huge +1 here. I'd love to see us moving in the direction where types are leveraged. On Tue, Jun 20, 2017 at 7:37 PM, Toshio Kuratomi <a.badger@xxxxxxxxx> wrote: > On Tue, Jun 20, 2017 at 6:06 AM, Kushal Das <mail@xxxxxxxxxxxx> wrote: >> Type annotations or type hints are purely for >> external type checking tools, they do not affect the Python interpreter >> anyway. > > Note that this statement is incorrect. Code like this: > https://docs.python.org/3/library/typing.html#user-defined-generic-types > where inheritance of a class from the typing module is used affects > running code. Mark Shannon gave a talk at the pycon language summit > and plead for the typing module to divorce type checking from > inheritance and pointed out that the implementation slows down > runtime. He further pointed out that using inheritance for type > information like this was not a proper fit; that sometimes the class > inherited from should not have anything to do with the type > information. > > -Toshio > _______________________________________________ > infrastructure mailing list -- infrastructure@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to infrastructure-leave@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ infrastructure mailing list -- infrastructure@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to infrastructure-leave@xxxxxxxxxxxxxxxxxxxxxxx
