From 8faab1b6f4cf6c83dddb17862b811db277db73fa Mon Sep 17 00:00:00 2001
From: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Date: Sat, 29 Oct 2022 22:13:42 +0530
Subject: [PATCH] GH-90352: fix _SelectorDatagramTransport to inherit from
 DatagramTransport (GH-98844) (cherry picked from commit
 9bdec0aa4516650e51b998418fb6188427137fed)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
---
 Lib/asyncio/selector_events.py                                | 2 +-
 Lib/test/test_asyncio/test_selector_events.py                 | 4 ++++
 .../Library/2022-10-29-09-42-20.gh-issue-90352.t8QEPt.rst     | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2022-10-29-09-42-20.gh-issue-90352.t8QEPt.rst

diff --git a/Lib/asyncio/selector_events.py b/Lib/asyncio/selector_events.py
index 572d4a8ce12d49..fb169649e55166 100644
--- a/Lib/asyncio/selector_events.py
+++ b/Lib/asyncio/selector_events.py
@@ -990,7 +990,7 @@ def _reset_empty_waiter(self):
         self._empty_waiter = None
 
 
-class _SelectorDatagramTransport(_SelectorTransport):
+class _SelectorDatagramTransport(_SelectorTransport, transports.DatagramTransport):
 
     _buffer_factory = collections.deque
 
diff --git a/Lib/test/test_asyncio/test_selector_events.py b/Lib/test/test_asyncio/test_selector_events.py
index ac221da4432f1f..c09bdc1ebcacf2 100644
--- a/Lib/test/test_asyncio/test_selector_events.py
+++ b/Lib/test/test_asyncio/test_selector_events.py
@@ -1114,6 +1114,10 @@ def test_read_ready(self):
         self.protocol.datagram_received.assert_called_with(
             b'data', ('0.0.0.0', 1234))
 
+    def test_transport_inheritance(self):
+        transport = self.datagram_transport()
+        self.assertIsInstance(transport, asyncio.DatagramTransport)
+
     def test_read_ready_tryagain(self):
         transport = self.datagram_transport()
 
diff --git a/Misc/NEWS.d/next/Library/2022-10-29-09-42-20.gh-issue-90352.t8QEPt.rst b/Misc/NEWS.d/next/Library/2022-10-29-09-42-20.gh-issue-90352.t8QEPt.rst
new file mode 100644
index 00000000000000..8e80eae512e6d5
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-10-29-09-42-20.gh-issue-90352.t8QEPt.rst
@@ -0,0 +1 @@
+Fix ``_SelectorDatagramTransport`` to inherit from :class:`~asyncio.DatagramTransport` in :mod:`asyncio`. Patch by Kumar Aditya.