bpo-35341: Add generic version of OrderedDict to typing (GH-10850)

2 files changed, 17 insertions, 0 deletions

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 6d8cc53..0d66ebb 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -2075,6 +2075,22 @@ class CollectionsAbcTests(BaseTestCase):
         self.assertIsSubclass(MyDefDict, collections.defaultdict)
         self.assertNotIsSubclass(collections.defaultdict, MyDefDict)
 
+    def test_ordereddict_instantiation(self):
+        self.assertIs(type(typing.OrderedDict()), collections.OrderedDict)
+        self.assertIs(type(typing.OrderedDict[KT, VT]()), collections.OrderedDict)
+        self.assertIs(type(typing.OrderedDict[str, int]()), collections.OrderedDict)
+
+    def test_ordereddict_subclass(self):
+
+        class MyOrdDict(typing.OrderedDict[str, int]):
+            pass
+
+        od = MyOrdDict()
+        self.assertIsInstance(od, MyOrdDict)
+
+        self.assertIsSubclass(MyOrdDict, collections.OrderedDict)
+        self.assertNotIsSubclass(collections.OrderedDict, MyOrdDict)
+
     @skipUnless(sys.version_info >= (3, 3), 'ChainMap was added in 3.3')
     def test_chainmap_instantiation(self):
         self.assertIs(type(typing.ChainMap()), collections.ChainMap)
diff --git a/Lib/typing.py b/Lib/typing.py
index 4f9e045..3243e2a 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1241,6 +1241,7 @@ ContextManager = _alias(contextlib.AbstractContextManager, T_co)
 AsyncContextManager = _alias(contextlib.AbstractAsyncContextManager, T_co)
 Dict = _alias(dict, (KT, VT), inst=False)
 DefaultDict = _alias(collections.defaultdict, (KT, VT))
+OrderedDict = _alias(collections.OrderedDict, (KT, VT))
 Counter = _alias(collections.Counter, T)
 ChainMap = _alias(collections.ChainMap, (KT, VT))
 Generator = _alias(collections.abc.Generator, (T_co, T_contra, V_co))