[Python-checkins] Generic itertools.chain (GH-19417)
Ethan Smith
webhook-mailer at python.org
Thu Apr 9 23:28:19 EDT 2020
https://github.com/python/cpython/commit/a8403d057d41a022d819fd8d6fbe2a666f72b6f5
commit: a8403d057d41a022d819fd8d6fbe2a666f72b6f5
branch: master
author: Ethan Smith <ethan at ethanhs.me>
committer: GitHub <noreply at github.com>
date: 2020-04-09T20:28:08-07:00
summary:
Generic itertools.chain (GH-19417)
files:
M Lib/test/test_genericalias.py
M Modules/itertoolsmodule.c
diff --git a/Lib/test/test_genericalias.py b/Lib/test/test_genericalias.py
index 9c5b23e5e5b0f..d8acdee2da3e2 100644
--- a/Lib/test/test_genericalias.py
+++ b/Lib/test/test_genericalias.py
@@ -7,6 +7,7 @@
)
from collections.abc import *
from contextlib import AbstractContextManager, AbstractAsyncContextManager
+from itertools import chain
from os import DirEntry
from re import Pattern, Match
from types import GenericAlias, MappingProxyType
@@ -35,7 +36,8 @@ def test_subscriptable(self):
Mapping, MutableMapping, MappingView,
KeysView, ItemsView, ValuesView,
Sequence, MutableSequence,
- MappingProxyType, DirEntry
+ MappingProxyType, DirEntry,
+ chain,
):
tname = t.__name__
with self.subTest(f"Testing {tname}"):
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index e99c964ac1d79..4ebeb741b6b5c 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -2028,6 +2028,8 @@ static PyMethodDef chain_methods[] = {
reduce_doc},
{"__setstate__", (PyCFunction)chain_setstate, METH_O,
setstate_doc},
+ {"__class_getitem__", (PyCFunction)Py_GenericAlias,
+ METH_O|METH_CLASS, PyDoc_STR("See PEP 585")},
{NULL, NULL} /* sentinel */
};
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