python/aqmp: add scary message

Add a warning whenever AQMP is used to steer people gently away from
using it for the time-being.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20210915162955.333025-24-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>

python/qemu/aqmp/__init__.py

@@ -21,6 +21,8 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 
+import warnings
+
 from .error import AQMPError
 from .events import EventListener
 from .message import Message
@@ -28,6 +30,18 @@
 from .qmp_client import ExecInterruptedError, ExecuteError, QMPClient
 
 
+_WMSG = """
+
+The Asynchronous QMP library is currently in development and its API
+should be considered highly fluid and subject to change. It should
+not be used by any other scripts checked into the QEMU tree.
+
+Proceed with caution!
+"""
+
+warnings.warn(_WMSG, FutureWarning)
+
+
 # The order of these fields impact the Sphinx documentation order.
 __all__ = (
     # Classes, most to least important