From: John Snow <jsnow@redhat.com>
Date: Mon, 7 Jun 2021 20:06:37 +0000 (-0400)
Subject: python/qmp: return generic type from context manager
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=eac8aabc92f80d9a41d9f01163921472e309334c;p=qemu.git

python/qmp: return generic type from context manager

__enter__ can be invoked from a subclass, so it needs a more flexible
type.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20210607200649.1840382-31-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
---

diff --git a/python/qemu/qmp/__init__.py b/python/qemu/qmp/__init__.py
index ba0d2281d6..376954cb6d 100644
--- a/python/qemu/qmp/__init__.py
+++ b/python/qemu/qmp/__init__.py
@@ -30,6 +30,7 @@ from typing import (
     TextIO,
     Tuple,
     Type,
+    TypeVar,
     Union,
     cast,
 )
@@ -220,7 +221,9 @@ class QEMUMonitorProtocol:
             if ret is None:
                 raise QMPConnectError("Error while reading from socket")
 
-    def __enter__(self) -> 'QEMUMonitorProtocol':
+    T = TypeVar('T')
+
+    def __enter__(self: T) -> T:
         # Implement context manager enter function.
         return self