bpo-42392: Improve removal of *loop* parameter in asyncio primitives (GH-23499)

* Update code after merge review from 1st1

* Use a sentinel approach for loop parameter
Remove unnecessary _get_running_loop patching

* Use more clear function name (_verify_parameter_is_marker -> _verify_no_loop)

* Add init method to _LoopBoundMixin to check that loop param wasn't used

1 files changed, 3 insertions, 2 deletions

diff --git a/Lib/asyncio/queues.py b/Lib/asyncio/queues.py
index 78ae9e9..a87ec8b 100644
--- a/Lib/asyncio/queues.py
+++ b/Lib/asyncio/queues.py
@@ -17,7 +17,7 @@ class QueueFull(Exception):
     pass
 
 
-class Queue(mixins._LoopBoundedMixin):
+class Queue(mixins._LoopBoundMixin):
     """A queue, useful for coordinating producer and consumer coroutines.
 
     If maxsize is less than or equal to zero, the queue size is infinite. If it
@@ -29,7 +29,8 @@ class Queue(mixins._LoopBoundedMixin):
     interrupted between calling qsize() and doing an operation on the Queue.
     """
 
-    def __init__(self, maxsize=0):
+    def __init__(self, maxsize=0, *, loop=mixins._marker):
+        super().__init__(loop=loop)
         self._maxsize = maxsize
 
         # Futures.