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bpo-39481: Generic alias for itertools.chain #19417

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Merged
gvanrossum merged 1 commit into from
Apr 10, 2020
Merged

bpo-39481: Generic alias for itertools.chain #19417

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4 changes: 3 additions & 1 deletion Lib/test/test_genericalias.py
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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}"):
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2 changes: 2 additions & 0 deletions Modules/itertoolsmodule.c
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Expand Up @@ -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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