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bpo-37759: Remove draft status. Add asyncio REPL example #16785

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37 changes: 29 additions & 8 deletions Doc/whatsnew/3.8.rst
Original file line number Diff line number Diff line change
Expand Up @@ -47,14 +47,6 @@
This article explains the new features in Python 3.8, compared to 3.7.
For full details, see the :ref:`changelog <changelog>`.

Prerelease users should be aware that this document is currently in
draft form. It will be updated as Python 3.8 moves towards release, so
it's worth checking back even after reading earlier versions. Some
notable items not yet covered are:

* :pep:`578` - Runtime audit hooks for potentially sensitive operations
* ``python -m asyncio`` runs a natively async REPL

.. testsetup::

from datetime import date
Expand Down Expand Up @@ -287,6 +279,18 @@ calculations can be shown::
(Contributed by Eric V. Smith and Larry Hastings in :issue:`36817`.)


PEP 578: Python Runtime Audit Hooks
-----------------------------------

The PEP adds an Audit Hook and Verified Open Hook. Both are available from
Python and native code, allowing applications and frameworks written in pure
Python code to take advantage of extra notifications, while also allowing
embedders or system administrators to deploy builds of Python where auditing is
always enabled.

See :pep:`578` for full details.


PEP 587: Python Initialization Configuration
--------------------------------------------

Expand Down Expand Up @@ -584,6 +588,23 @@ The :func:`ast.parse` function has some new flags:
asyncio
-------

Running ``python -m asyncio`` launches a natively async REPL. This allows rapid
experimentation with code that has a top-level :keyword:`await`. There is no
longer a need to directly call ``asyncio.run()`` which would spawn a new event
loop on every invocation:

.. code-block:: none

$ python -m asyncio
asyncio REPL 3.8.0
Use "await" directly instead of "asyncio.run()".
Type "help", "copyright", "credits" or "license" for more information.
>>> import asyncio
>>> await asyncio.sleep(10, result='hello')
hello

(Contributed by Yury Selivanov in :issue:`37028`.)

On Windows, the default event loop is now :class:`~asyncio.ProactorEventLoop`.
(Contributed by Victor Stinner in :issue:`34687`.)

Expand Down