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-rw-r--r--Lib/concurrent/futures/_base.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/concurrent/futures/_base.py b/Lib/concurrent/futures/_base.py
index fd0acec..bf546f8 100644
--- a/Lib/concurrent/futures/_base.py
+++ b/Lib/concurrent/futures/_base.py
@@ -7,6 +7,7 @@ import collections
import logging
import threading
import time
+import types
FIRST_COMPLETED = 'FIRST_COMPLETED'
FIRST_EXCEPTION = 'FIRST_EXCEPTION'
@@ -544,6 +545,8 @@ class Future(object):
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."""