On 10/7/2020 1:18 PM, Guido van Rossum wrote:
Could you explain how Maggie's proposal (writing 'int?') would
conflict with Pablo's proposal? IIUC Maggie's proposal would require
'int?' to become a valid expression.
(As I expressed in the typing-sig thread, I'm lukewarm about 'int?'
because we will have 'int | None'. The same reasoning applies to
'?int' FWIW.)
Well, Maggie's proposal says that int? would be a typing-specific
syntax: "Should PEP 505 be approved in the future, it would not
interfere with the typing specific |?| proposed in this PEP."
My concern was just that Pablo's proposal (as I understand it) would
mean there are no typing-specific expressions.
Eric
On Wed, Oct 7, 2020 at 7:42 AM Eric V. Smith <[email protected]
<mailto:[email protected]>> wrote:
On 10/7/2020 10:29 AM, Sebastian Kreft wrote:
There's already a proposal. See
https://gist.github.com/MaggieMoss/c848cb3a581979f445d075c15629c950
and
https://mail.python.org/archives/list/[email protected]/thread/SWAY6V7WZLVPGYQEMHXJROT2747OXSRX/
I think this would conflict with
https://bugs.python.org/issue41967, where Pablo suggests moving
the annotations into the parser. Annotations would then need to be
valid expressions, if I'm reading it correctly. It's probably
possible to work around this, but I'm not sure what it would take.
Eric
On Wed, Oct 7, 2020 at 9:50 AM Sebastian Noel Lübke
<[email protected] <mailto:[email protected]>> wrote:
Hey,
python 3.9 introduced the | operator for union types. it
would be nice to have something like that for optional types.
maybe like
name: ? int
or
name: int ?
best regards
Sebastian Lübke
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/Pronouns: he/him //(why is my pronoun here?)/
<http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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