[3.8]bpo-37759: Remove draft status. Add asyncio REPL example (GH-16785) by miss-islington · Pull Request #16786 · python/cpython
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
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 --------------------------------------------
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`.)