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PEP 645: Mark as Withdrawn (and as Standards Track) (#2529) 

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Co-authored-by: Guido van Rossum <gvanrossum@gmail.com>
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@ -2,10 +2,11 @@ PEP: 645
Title: Allow writing optional types as ``x?``
Author: Maggie Moss <maggiebmoss@gmail.com>
Sponsor: Guido van Rossum <guido@python.org>
Status: Draft
Type: Process
Status: Withdrawn
Type: Standards Track
Content-Type: text/x-rst
Created: 25-Aug-2020
Resolution: https://mail.python.org/archives/list/typing-sig@python.org/message/E75SPV6DDHLEEFSA5MBN5HUOQWDMUQJ2/
Abstract
@ -13,6 +14,21 @@ Abstract
This PEP proposes adding a ``?`` operator for types to allow writing ``int?`` in place of ``Optional[int]``.
PEP Withdrawal
==============
The notation ``T|None`` introduced by :pep:`604` to write ``Optional[T]`` is a
fine alternative to ``T?`` and does not require new syntax.
Using ``T?`` to mean ``T|None`` is also inconsistent with TypeScript
where it roughly means ``NotRequired[T]``.
Such inconsistency would likely confuse folks coming from TypeScript to Python.
The above represents the consensus of
`typing-sig <https://mail.python.org/archives/list/typing-sig@python.org/>`_
and the sponsor of this PEP.
Motivation
==========
Types have become a valuable and powerful part of the Python language. However, many type annotations are verbose and add
@ -118,7 +134,7 @@ Backwards Compatibility
Reference Implementation
========================
A reference implementation can be found `here <https://github.com/python/cpython/compare/master...MaggieMoss:new-optional-syntax-postfix>`_ [5].
A reference implementation can be found `here <https://github.com/python/cpython/compare/main...MaggieMoss:new-optional-syntax-postfix>`_.
Rejected Ideas
==============
@ -136,8 +152,6 @@ References
(https://gist.github.com/MaggieMoss/fd8dfe002b2702fae243dbf81a62624e)
.. [3] Github Issue Discussion of Optional syntax
(https://github.com/python/typing/issues/429)
.. [5] Reference Implementation
(https://github.com/python/cpython/compare/master...MaggieMoss:new-optional-syntax-postfix)
Copyright
=========