gh-109599: Add types.CapsuleType (#109600)

---------

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>

3 files changed, 14 insertions, 1 deletions

diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index f4948ce..c616a27 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -1,5 +1,6 @@
 import builtins
 import codecs
+import _datetime
 import gc
 import locale
 import operator
@@ -1581,7 +1582,7 @@ class SizeofTest(unittest.TestCase):
             x = property(getx, setx, delx, "")
             check(x, size('5Pi'))
         # PyCapsule
-        # XXX
+        check(_datetime.datetime_CAPI, size('6P'))
         # rangeiterator
         check(iter(range(1)), size('3l'))
         check(iter(range(2**65)), size('3P'))
diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
index c6bff79..da32c4e 100644
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -4,6 +4,7 @@ from test.support import run_with_locale, cpython_only
 import collections.abc
 from collections import namedtuple
 import copy
+import _datetime
 import gc
 import inspect
 import pickle
@@ -636,6 +637,9 @@ class TypesTests(unittest.TestCase):
         self.assertIsInstance(exc.__traceback__, types.TracebackType)
         self.assertIsInstance(exc.__traceback__.tb_frame, types.FrameType)
 
+    def test_capsule_type(self):
+        self.assertIsInstance(_datetime.datetime_CAPI, types.CapsuleType)
+
 
 class UnionTests(unittest.TestCase):
 
diff --git a/Lib/types.py b/Lib/types.py
index b4aa19c..1484c22 100644
--- a/Lib/types.py
+++ b/Lib/types.py
@@ -1,6 +1,7 @@
 """
 Define names for built-in types that aren't directly accessible as a builtin.
 """
+
 import sys
 
 # Iterators in Python aren't a matter of type but of protocol.  A large
@@ -330,4 +331,11 @@ EllipsisType = type(Ellipsis)
 NoneType = type(None)
 NotImplementedType = type(NotImplemented)
 
+def __getattr__(name):
+    if name == 'CapsuleType':
+        import _socket
+        return type(_socket.CAPI)
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
 __all__ = [n for n in globals() if n[:1] != '_']
+__all__ += ['CapsuleType']