1 files changed, 15 insertions, 7 deletions

diff --git a/python/qemu/qmp/message.py b/python/qemu/qmp/message.py
index f76ccc9..dabb8ec 100644
--- a/python/qemu/qmp/message.py
+++ b/python/qemu/qmp/message.py
@@ -28,7 +28,8 @@ class Message(MutableMapping[str, object]):
     be instantiated from either another mapping (like a `dict`), or from
     raw `bytes` that still need to be deserialized.
 
-    Once instantiated, it may be treated like any other MutableMapping::
+    Once instantiated, it may be treated like any other
+    :py:obj:`~collections.abc.MutableMapping`::
 
         >>> msg = Message(b'{"hello": "world"}')
         >>> assert msg['hello'] == 'world'
@@ -50,12 +51,19 @@ class Message(MutableMapping[str, object]):
        >>> dict(msg)
        {'hello': 'world'}
 
+    Or pretty-printed::
+
+       >>> print(str(msg))
+       {
+         "hello": "world"
+       }
 
     :param value: Initial value, if any.
     :param eager:
         When `True`, attempt to serialize or deserialize the initial value
         immediately, so that conversion exceptions are raised during
         the call to ``__init__()``.
+
     """
     # pylint: disable=too-many-ancestors
 
@@ -178,15 +186,15 @@ class DeserializationError(ProtocolError):
     :param raw: The raw `bytes` that prompted the failure.
     """
     def __init__(self, error_message: str, raw: bytes):
-        super().__init__(error_message)
+        super().__init__(error_message, raw)
         #: The raw `bytes` that were not understood as JSON.
         self.raw: bytes = raw
 
     def __str__(self) -> str:
-        return "\n".join([
+        return "\n".join((
             super().__str__(),
             f"  raw bytes were: {str(self.raw)}",
-        ])
+        ))
 
 
 class UnexpectedTypeError(ProtocolError):
@@ -197,13 +205,13 @@ class UnexpectedTypeError(ProtocolError):
     :param value: The deserialized JSON value that wasn't an object.
     """
     def __init__(self, error_message: str, value: object):
-        super().__init__(error_message)
+        super().__init__(error_message, value)
         #: The JSON value that was expected to be an object.
         self.value: object = value
 
     def __str__(self) -> str:
         strval = json.dumps(self.value, indent=2)
-        return "\n".join([
+        return "\n".join((
             super().__str__(),
             f"  json value was: {strval}",
-        ])
+        ))