[Python-checkins] [3.11] gh-100160: Remove any deprecation warnings in asyncio.get_event_loop() (#100412)
gvanrossum
webhook-mailer at python.org
Tue Jan 10 15:20:16 EST 2023
https://github.com/python/cpython/commit/1b2459dc64b1c3eea89312ea9bf422f8d7c75bb2
commit: 1b2459dc64b1c3eea89312ea9bf422f8d7c75bb2
branch: 3.11
author: Serhiy Storchaka <storchaka at gmail.com>
committer: gvanrossum <gvanrossum at gmail.com>
date: 2023-01-10T12:20:09-08:00
summary:
[3.11] gh-100160: Remove any deprecation warnings in asyncio.get_event_loop() (#100412)
Some deprecation warnings will reappear (in a slightly different form) in 3.12.
Co-authored-by: Guido van Rossum <guido at python.org>
files:
A Misc/NEWS.d/next/Library/2022-12-21-18-29-24.gh-issue-100160.isBmL5.rst
M Doc/library/asyncio-eventloop.rst
M Doc/library/asyncio-policy.rst
M Doc/whatsnew/3.10.rst
M Lib/asyncio/events.py
M Lib/test/test_asyncio/test_events.py
diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index d32e848a8413..c7343826be3f 100644
--- a/Doc/library/asyncio-eventloop.rst
+++ b/Doc/library/asyncio-eventloop.rst
@@ -48,7 +48,7 @@ an event loop:
running event loop.
If there is no running event loop set, the function will return
- the result of ``get_event_loop_policy().get_event_loop()`` call.
+ the result of the ``get_event_loop_policy().get_event_loop()`` call.
Because this function has rather complex behavior (especially
when custom event loop policies are in use), using the
@@ -59,15 +59,15 @@ an event loop:
instead of using these lower level functions to manually create and close an
event loop.
- .. deprecated:: 3.10
- Deprecation warning is emitted if there is no current event loop.
- In Python 3.12 it will be an error.
-
.. note::
In Python versions 3.10.0--3.10.8 and 3.11.0 this function
- (and other functions which used it implicitly) emitted a
+ (and other functions which use it implicitly) emitted a
:exc:`DeprecationWarning` if there was no running event loop, even if
- the current loop was set.
+ the current loop was set on the policy.
+ In Python versions 3.10.9, 3.11.1 and 3.12 they emit a
+ :exc:`DeprecationWarning` if there is no running event loop and no
+ current loop is set.
+ In some future Python release this will become an error.
.. function:: set_event_loop(loop)
diff --git a/Doc/library/asyncio-policy.rst b/Doc/library/asyncio-policy.rst
index d0af45febd14..eb043b3e5e7f 100644
--- a/Doc/library/asyncio-policy.rst
+++ b/Doc/library/asyncio-policy.rst
@@ -112,10 +112,11 @@ asyncio ships with the following built-in policies:
On Windows, :class:`ProactorEventLoop` is now used by default.
- .. deprecated:: 3.11.1
- :meth:`get_event_loop` now emits a :exc:`DeprecationWarning` if there
- is no current event loop set and a new event loop has been implicitly
- created. In Python 3.12 it will be an error.
+ .. note::
+ In Python versions 3.10.9, 3.11.1 and 3.12 this function emits a
+ :exc:`DeprecationWarning` if there is no running event loop and no
+ current loop is set.
+ In some future Python release this will become an error.
.. class:: WindowsSelectorEventLoopPolicy
diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst
index 33fdc6f0604c..ed72af717f66 100644
--- a/Doc/whatsnew/3.10.rst
+++ b/Doc/whatsnew/3.10.rst
@@ -1708,19 +1708,6 @@ Deprecated
scheduled for removal in Python 3.12.
(Contributed by Erlend E. Aasland in :issue:`42264`.)
-* :func:`asyncio.get_event_loop` now emits a deprecation warning if there is
- no running event loop. In the future it will be an alias of
- :func:`~asyncio.get_running_loop`.
- :mod:`asyncio` functions which implicitly create :class:`~asyncio.Future`
- or :class:`~asyncio.Task` objects now emit
- a deprecation warning if there is no running event loop and no explicit
- *loop* argument is passed: :func:`~asyncio.ensure_future`,
- :func:`~asyncio.wrap_future`, :func:`~asyncio.gather`,
- :func:`~asyncio.shield`, :func:`~asyncio.as_completed` and constructors of
- :class:`~asyncio.Future`, :class:`~asyncio.Task`,
- :class:`~asyncio.StreamReader`, :class:`~asyncio.StreamReaderProtocol`.
- (Contributed by Serhiy Storchaka in :issue:`39529`.)
-
* The undocumented built-in function ``sqlite3.enable_shared_cache`` is now
deprecated, scheduled for removal in Python 3.12. Its use is strongly
discouraged by the SQLite3 documentation. See `the SQLite3 docs
diff --git a/Lib/asyncio/events.py b/Lib/asyncio/events.py
index af3f9e970b51..b1799320eaa0 100644
--- a/Lib/asyncio/events.py
+++ b/Lib/asyncio/events.py
@@ -671,21 +671,6 @@ def get_event_loop(self):
if (self._local._loop is None and
not self._local._set_called and
threading.current_thread() is threading.main_thread()):
- stacklevel = 2
- try:
- f = sys._getframe(1)
- except AttributeError:
- pass
- else:
- while f:
- module = f.f_globals.get('__name__')
- if not (module == 'asyncio' or module.startswith('asyncio.')):
- break
- f = f.f_back
- stacklevel += 1
- import warnings
- warnings.warn('There is no current event loop',
- DeprecationWarning, stacklevel=stacklevel)
self.set_event_loop(self.new_event_loop())
if self._local._loop is None:
diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index 3f92122b0c76..5728d25254f3 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -2588,9 +2588,7 @@ def test_event_loop_policy(self):
def test_get_event_loop(self):
policy = asyncio.DefaultEventLoopPolicy()
self.assertIsNone(policy._local._loop)
- with self.assertWarns(DeprecationWarning) as cm:
- loop = policy.get_event_loop()
- self.assertEqual(cm.filename, __file__)
+ loop = policy.get_event_loop()
self.assertIsInstance(loop, asyncio.AbstractEventLoop)
self.assertIs(policy._local._loop, loop)
@@ -2604,10 +2602,8 @@ def test_get_event_loop_calls_set_event_loop(self):
policy, "set_event_loop",
wraps=policy.set_event_loop) as m_set_event_loop:
- with self.assertWarns(DeprecationWarning) as cm:
- loop = policy.get_event_loop()
+ loop = policy.get_event_loop()
self.addCleanup(loop.close)
- self.assertEqual(cm.filename, __file__)
# policy._local._loop must be set through .set_event_loop()
# (the unix DefaultEventLoopPolicy needs this call to attach
@@ -2796,10 +2792,8 @@ def test_get_event_loop_returns_running_loop2(self):
loop = asyncio.new_event_loop()
self.addCleanup(loop.close)
- with self.assertWarns(DeprecationWarning) as cm:
- loop2 = asyncio.get_event_loop()
+ loop2 = asyncio.get_event_loop()
self.addCleanup(loop2.close)
- self.assertEqual(cm.filename, __file__)
asyncio.set_event_loop(None)
with self.assertRaisesRegex(RuntimeError, 'no current'):
asyncio.get_event_loop()
diff --git a/Misc/NEWS.d/next/Library/2022-12-21-18-29-24.gh-issue-100160.isBmL5.rst b/Misc/NEWS.d/next/Library/2022-12-21-18-29-24.gh-issue-100160.isBmL5.rst
new file mode 100644
index 000000000000..c3b518ca85d7
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-12-21-18-29-24.gh-issue-100160.isBmL5.rst
@@ -0,0 +1,2 @@
+Remove any deprecation warnings in :func:`asyncio.get_event_loop`. They are
+deferred to Python 3.12.
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