[Python-checkins] bpo-36373: Deprecate explicit loop parameter in all public asyncio APIs [queue] (GH-13950)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/55daf1a56163e0673654712bb92ce47a9b6f7be3
commit: 55daf1a56163e0673654712bb92ce47a9b6f7be3
branch: 3.8
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2019-09-10T05:50:14-07:00
summary:

bpo-36373: Deprecate explicit loop parameter in all public asyncio APIs [queue] (GH-13950)


This PR deprecate explicit loop parameters in all public asyncio APIs

This issues is split to be easier to review.

fourth step: queue.py

https://bugs.python.org/issue36373
(cherry picked from commit 9008be303a89bfab8c3314c6a42330b5523adc8b)

Co-authored-by: Emmanuel Arias <emmanuelarias30 at gmail.com>

files:
M Doc/library/asyncio-queue.rst
M Lib/asyncio/queues.py

diff --git a/Doc/library/asyncio-queue.rst b/Doc/library/asyncio-queue.rst
index 7be1023c80cc..e7775da54f58 100644
--- a/Doc/library/asyncio-queue.rst
+++ b/Doc/library/asyncio-queue.rst
@@ -32,6 +32,10 @@ Queue
    the queue is always known and can be returned by calling the
    :meth:`qsize` method.
 
+   .. deprecated-removed:: 3.8 3.10
+      The *loop* parameter.
+
+
    This class is :ref:`not thread safe <asyncio-multithreading>`.
 
    .. attribute:: maxsize
diff --git a/Lib/asyncio/queues.py b/Lib/asyncio/queues.py
index 2a8d3e760441..c96b4a0c1ba3 100644
--- a/Lib/asyncio/queues.py
+++ b/Lib/asyncio/queues.py
@@ -2,6 +2,7 @@
 
 import collections
 import heapq
+import warnings
 
 from . import events
 from . import locks
@@ -34,6 +35,9 @@ def __init__(self, maxsize=0, *, loop=None):
             self._loop = events.get_event_loop()
         else:
             self._loop = loop
+            warnings.warn("The loop argument is deprecated since Python 3.8, "
+                          "and scheduled for removal in Python 3.10.",
+                          DeprecationWarning, stacklevel=2)
         self._maxsize = maxsize
 
         # Futures.