[Python-Dev] PEP 484 proposal: don't default to Optional if argument default is None (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Tue May 9 22:37:42 EDT 2017

On 10 May 2017 at 08:51, Brett Cannon <brett at python.org> wrote:

On Tue, 9 May 2017 at 11:11 Carl Meyer <carl at oddbird.net> wrote:

It might be nice to have a less verbose syntax for Optional, but that can be a separate discussion. You should be able to do that today with from typing import Optional as Eh or whatever your preferred optional/maybe name is. :)

While "from typing import Optional as Opt" can indeed help, perhaps PEP 505 should be updated to discuss this point in addition to the current proposals for None-aware binary operators?

If it included a ? prefix operator as a shorthand for "typing.Optional[]", that would shorten affected declarations back to:

def handle_employee(e: ?Employee = None) -> None: ...

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

More information about the Python-Dev mailing list