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

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[<expr>]", that would shorten affected declarations
back to:

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

Cheers,
Nick.

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