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

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

Author: isidentical

Lib/concurrent/futures/_base.py

@@ -7,6 +7,7 @@
 import logging
 import threading
 import time
+import types
 
 FIRST_COMPLETED = 'FIRST_COMPLETED'
 FIRST_EXCEPTION = 'FIRST_EXCEPTION'
@@ -544,6 +545,8 @@ def set_exception(self, exception):
             self._condition.notify_all()
         self._invoke_callbacks()
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 class Executor(object):
     """This is an abstract base class for concrete asynchronous executors."""
 

Lib/concurrent/futures/thread.py

@@ -10,6 +10,7 @@
 import itertools
 import queue
 import threading
+import types
 import weakref
 import os
 
@@ -57,6 +58,8 @@ def run(self):
         else:
             self.future.set_result(result)
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 def _worker(executor_reference, work_queue, initializer, initargs):
     if initializer is not None:

Lib/ctypes/__init__.py

@@ -1,6 +1,7 @@
 """create and manipulate C data types in Python"""
 
 import os as _os, sys as _sys
+import types as _types
 
 __version__ = "1.1.0"
 
@@ -450,6 +451,8 @@ def __getitem__(self, name):
     def LoadLibrary(self, name):
         return self._dlltype(name)
 
+    __class_getitem__ = classmethod(_types.GenericAlias)
+
 cdll = LibraryLoader(CDLL)
 pydll = LibraryLoader(PyDLL)
 

Lib/http/cookies.py

@@ -131,6 +131,7 @@
 #
 import re
 import string
+import types
 
 __all__ = ["CookieError", "BaseCookie", "SimpleCookie"]
 
@@ -419,6 +420,8 @@ def OutputString(self, attrs=None):
         # Return the result
         return _semispacejoin(result)
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 #
 # Pattern for finding cookie

Lib/multiprocessing/managers.py

@@ -21,6 +21,7 @@
 import array
 import queue
 import time
+import types
 import os
 from os import getpid
 
@@ -1129,6 +1130,8 @@ def set(self, value):
         return self._callmethod('set', (value,))
     value = property(get, set)
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 BaseListProxy = MakeProxyType('BaseListProxy', (
     '__add__', '__contains__', '__delitem__', '__getitem__', '__len__',

Lib/multiprocessing/pool.py

@@ -20,6 +20,7 @@
 import threading
 import time
 import traceback
+import types
 import warnings
 from queue import Empty
 
@@ -780,6 +781,8 @@ def _set(self, i, obj):
         del self._cache[self._job]
         self._pool = None
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 AsyncResult = ApplyResult       # create alias -- see #17805
 
 #

Lib/multiprocessing/queues.py

@@ -14,6 +14,7 @@
 import threading
 import collections
 import time
+import types
 import weakref
 import errno
 
@@ -366,3 +367,5 @@ def put(self, obj):
         else:
             with self._wlock:
                 self._writer.send_bytes(obj)
+
+    __class_getitem__ = classmethod(types.GenericAlias)

Lib/multiprocessing/shared_memory.py

@@ -14,6 +14,7 @@
 import errno
 import struct
 import secrets
+import types
 
 if os.name == "nt":
     import _winapi
@@ -508,3 +509,5 @@ def index(self, value):
                 return position
         else:
             raise ValueError(f"{value!r} not in this container")
+
+    __class_getitem__ = classmethod(types.GenericAlias)

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 @@ def _put(self, item):
     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 @@ def qsize(self):
         '''Return the approximate size of the queue (not reliable!).'''
         return len(self._queue)
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 if SimpleQueue is None:
     SimpleQueue = _PySimpleQueue

Lib/tempfile.py

@@ -829,3 +829,5 @@ def __exit__(self, exc, value, tb):
     def cleanup(self):
         if self._finalizer.detach():
             self._rmtree(self.name)
+
+    __class_getitem__ = classmethod(_types.GenericAlias)