bpo-39481: PEP 585 for a variety of modules (GH-19423)

- concurrent.futures
- ctypes
- http.cookies
- multiprocessing
- queue
- tempfile
- unittest.case
- urllib.parse

Lib/queue.py

@@ -1,6 +1,7 @@
 '''A multi-producer, multi-consumer queue.'''
 
 import threading
+import types
 from collections import deque
 from heapq import heappush, heappop
 from time import monotonic as time
@@ -216,6 +217,8 @@ class Queue:
     def _get(self):
         return self.queue.popleft()
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 class PriorityQueue(Queue):
     '''Variant of Queue that retrieves open entries in priority order (lowest first).
@@ -316,6 +319,8 @@ class _PySimpleQueue:
         '''Return the approximate size of the queue (not reliable!).'''
         return len(self._queue)
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 if SimpleQueue is None:
     SimpleQueue = _PySimpleQueue