[Python-ideas] Optional static typing -- the crossroads

[Petr Viktorin]

On Fri, Aug 15, 2014 at 9:48 AM, Łukasz Langa <lukasz at langa.pl> wrote:
...
> As a side note, I’m happy you’re willing to agree on str | None. This reads
> really well and is concise enough to not require aliasing to be usable.

The common use is not all that concise:
    def foo(bar: int | None=None): pass

Or alternatively it could be:
    def foo(bar: int=None): pass
if the default was automatically allowed.


Also... Does None magically mean NoneType in type definitions?