[PULL 60/72] python/qmp: return generic type from context manager

[John Snow]

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

Signed-off-by: John Snow <js...@redhat.com>
Message-id: 20210607200649.1840382-31-js...@redhat.com
Signed-off-by: John Snow <js...@redhat.com>
---
 python/qemu/qmp/__init__.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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 @@
     TextIO,
     Tuple,
     Type,
+    TypeVar,
     Union,
     cast,
 )
@@ -220,7 +221,9 @@ def __get_events(self, wait: Union[bool, float] = False) -> 
None:
             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
 
-- 
2.31.1