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-rw-r--r--python/qemu/qmp.py10
1 files changed, 7 insertions, 3 deletions
diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py
index 6ae7693965..73d49050ed 100644
--- a/python/qemu/qmp.py
+++ b/python/qemu/qmp.py
@@ -11,6 +11,10 @@ import json
 import errno
 import socket
 import logging
+from typing import (
+    Optional,
+    TextIO,
+)
 
 
 class QMPError(Exception):
@@ -61,7 +65,7 @@ class QEMUMonitorProtocol:
         self.__events = []
         self.__address = address
         self.__sock = self.__get_sock()
-        self.__sockfile = None
+        self.__sockfile: Optional[TextIO] = None
         self._nickname = nickname
         if self._nickname:
             self.logger = logging.getLogger('QMP').getChild(self._nickname)
@@ -157,7 +161,7 @@ class QEMUMonitorProtocol:
         @raise QMPCapabilitiesError if fails to negotiate capabilities
         """
         self.__sock.connect(self.__address)
-        self.__sockfile = self.__sock.makefile()
+        self.__sockfile = self.__sock.makefile(mode='r')
         if negotiate:
             return self.__negotiate_capabilities()
         return None
@@ -180,7 +184,7 @@ class QEMUMonitorProtocol:
         """
         self.__sock.settimeout(timeout)
         self.__sock, _ = self.__sock.accept()
-        self.__sockfile = self.__sock.makefile()
+        self.__sockfile = self.__sock.makefile(mode='r')
         return self.__negotiate_capabilities()
 
     def cmd_obj(self, qmp_cmd):