python/aqmp: Add dict conversion method to Greeting object

The iotests interface expects to return the greeting as a dict; AQMP
offers it as a rich object.

Signed-off-by: John Snow <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
Reviewed-by: Eric Blake <[email protected]>
Message-id: [email protected]
Signed-off-by: John Snow <[email protected]>

Author: jnsnow

python/qemu/aqmp/models.py

@@ -8,8 +8,10 @@
 # pylint: disable=too-few-public-methods
 
 from collections import abc
+import copy
 from typing import (
     Any,
+    Dict,
     Mapping,
     Optional,
     Sequence,
@@ -66,6 +68,17 @@ def __init__(self, raw: Mapping[str, Any]):
         self._check_member('QMP', abc.Mapping, "JSON object")
         self.QMP = QMPGreeting(self._raw['QMP'])
 
+    def _asdict(self) -> Dict[str, object]:
+        """
+        For compatibility with the iotests sync QMP wrapper.
+
+        The legacy QMP interface needs Greetings as a garden-variety Dict.
+
+        This interface is private in the hopes that it will be able to
+        be dropped again in the near-future. Caller beware!
+        """
+        return dict(copy.deepcopy(self._raw))
+
 
 class QMPGreeting(Model):
     """