I think that the only
thing I might use it for is to make it easier to annotate defaults (as
f(a: list[int] => []) rather than as f(a: list[int] | None = None).
Why not `f(a: Optional[list[int]] = None)`?
I'm not counting characters, but that form seems to express the intention better than either of the others IMHO.
Keeping medicines from the bloodstreams of the sick; food
from the bellies of the hungry; books from the hands of the
uneducated; technology from the underdeveloped; and putting
advocates of freedom in prisons. Intellectual property is
to the 21st century what the slave trade was to the 16th.