Jul 7, 2022 · Jul 7, 2022 · Jul 7, 2022 · Jul 7, 2022 · Jul 7, 2022 · Jul 18, 2022
diff --git a/Doc/library/asyncio-policy.rst b/Doc/library/asyncio-policy.rst
   :py:data:`SIGCHLD` is received).

   .. versionadded:: 3.8
   .. deprecated-removed:: 3.12 3.14

 .. class:: SafeChildWatcher

diff --git a/Doc/whatsnew/3.12.rst b/Doc/whatsnew/3.12.rst
 Deprecated
 ==========

 The following modules and APIs have been deprecated in this Python release,
 and will be removed in Python 3.14.

 APIs:

 * :class:`asyncio.MultiLoopChildWatcher` (:gh:`94648`)

 The following APIs were deprecated in this Python release and will be removed,
 although there is currently no date scheduled for their removal.

 APIs:

 * :class:`typing.Hashable` and :class:`typing.Sized` aliases for :class:`collections.abc.Hashable`
  and :class:`collections.abc.Sized`. (:gh:`94309`.)

diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
    # but retrieves the current loop by get_running_loop()

    def __init__(self):
        warnings._deprecated("asyncio.MultiLoopChildWatcher", remove=(3, 14))
        self._callbacks = {}
        self._saved_sighandler = None

diff --git a/Lib/test/test_asyncio/test_subprocess.py b/Lib/test/test_asyncio/test_subprocess.py

        Watcher = unix_events.ThreadedChildWatcher

    @unittest.skip("bpo-38323: MultiLoopChildWatcher has a race condition \
                    and these tests can hang the test suite")
    class SubprocessMultiLoopWatcherTests(SubprocessWatcherMixin,
                                          test_utils.TestCase):

        Watcher = unix_events.MultiLoopChildWatcher

    class SubprocessSafeWatcherTests(SubprocessWatcherMixin,
                                     test_utils.TestCase):

        Watcher = unix_events.PidfdChildWatcher


    class MultiLoopChildWatcherTests(unittest.TestCase):
        def test_deprecated(self):
            with self.assertWarns(DeprecationWarning):
                asyncio.MultiLoopChildWatcher()

    class GenericWatcherTests(test_utils.TestCase):

        def test_create_subprocess_fails_with_inactive_watcher(self):
diff --git a/Misc/NEWS.d/next/Library/2022-07-07-09-04-49.gh-issue-82504.6xtYAz.rst b/Misc/NEWS.d/next/Library/2022-07-07-09-04-49.gh-issue-82504.6xtYAz.rst
 Deprecate :class:`asyncio.MultiLoopChildWatcher` to be removed in Python 3.14.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -232,6 +232,7 @@ implementation used by the asyncio event loop:
		:py:data:`SIGCHLD` is received).

		.. versionadded:: 3.8
		.. deprecated-removed:: 3.12 3.14

		.. class:: SafeChildWatcher

Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -139,6 +139,18 @@ CPython bytecode changes
		Deprecated
		==========

		The following modules and APIs have been deprecated in this Python release,
		and will be removed in Python 3.14.

		APIs:

		* :class:`asyncio.MultiLoopChildWatcher` (:gh:`94648`)

		The following APIs were deprecated in this Python release and will be removed,
		although there is currently no date scheduled for their removal.

		APIs:

		* :class:`typing.Hashable` and :class:`typing.Sized` aliases for :class:`collections.abc.Hashable`
		and :class:`collections.abc.Sized`. (:gh:`94309`.)

Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1229,6 +1229,7 @@ class MultiLoopChildWatcher(AbstractChildWatcher):
		# but retrieves the current loop by get_running_loop()

		def __init__(self):
		warnings._deprecated("asyncio.MultiLoopChildWatcher", remove=(3, 14))
		self._callbacks = {}
		self._saved_sighandler = None

Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -666,13 +666,6 @@ class SubprocessThreadedWatcherTests(SubprocessWatcherMixin,

		Watcher = unix_events.ThreadedChildWatcher

		@unittest.skip("bpo-38323: MultiLoopChildWatcher has a race condition \
		and these tests can hang the test suite")
		class SubprocessMultiLoopWatcherTests(SubprocessWatcherMixin,
		test_utils.TestCase):

		Watcher = unix_events.MultiLoopChildWatcher

		class SubprocessSafeWatcherTests(SubprocessWatcherMixin,
		test_utils.TestCase):

Expand DownExpand Up		@@ -701,6 +694,11 @@ class SubprocessPidfdWatcherTests(SubprocessWatcherMixin,
		Watcher = unix_events.PidfdChildWatcher


		class MultiLoopChildWatcherTests(unittest.TestCase):
		def test_deprecated(self):
		with self.assertWarns(DeprecationWarning):
		asyncio.MultiLoopChildWatcher()

		class GenericWatcherTests(test_utils.TestCase):

		def test_create_subprocess_fails_with_inactive_watcher(self):
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Deprecate :class:`asyncio.MultiLoopChildWatcher` to be removed in Python 3.14.