From e3ec44d692d9442e640cf5b2d8708157a65cec3e Mon Sep 17 00:00:00 2001
From: Ethan Smith <ethan@ethanhs.me>
Date: Thu, 9 Apr 2020 21:47:31 -0700
Subject: bpo-39481: PEP 585 for difflib, filecmp, fileinput (#19422)

---
 Lib/fileinput.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'Lib/fileinput.py')

diff --git a/Lib/fileinput.py b/Lib/fileinput.py
index c1b0ec9a8e..0c31f93ed8 100644
--- a/Lib/fileinput.py
+++ b/Lib/fileinput.py
@@ -73,6 +73,7 @@ XXX Possible additions:
 """
 
 import sys, os
+from types import GenericAlias
 
 __all__ = ["input", "close", "nextfile", "filename", "lineno", "filelineno",
            "fileno", "isfirstline", "isstdin", "FileInput", "hook_compressed",
@@ -391,6 +392,8 @@ class FileInput:
     def isstdin(self):
         return self._isstdin
 
+    __class_getitem__ = classmethod(GenericAlias)
+
 
 def hook_compressed(filename, mode):
     ext = os.path.splitext(filename)[1]
-- 
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