From: John Snow <jsnow@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Eduardo Habkost" <ehabkost@redhat.com>,
qemu-block@nongnu.org,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Max Reitz" <mreitz@redhat.com>, "Cleber Rosa" <crosa@redhat.com>,
"John Snow" <jsnow@redhat.com>
Subject: [PULL 18/21] python/qemu/qmp.py: Preserve error context on re-raise
Date: Tue, 20 Oct 2020 13:27:39 -0400 [thread overview]
Message-ID: <20201020172742.1483258-19-jsnow@redhat.com> (raw)
In-Reply-To: <20201020172742.1483258-1-jsnow@redhat.com>
Use the "from ..." phrasing when re-raising errors to preserve their
initial context, to help aid debugging when things go wrong.
This also silences a pylint 2.6.0+ error.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20201006235817.3280413-18-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
---
python/qemu/qmp.py | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py
index 9223307ed8..d911999da1 100644
--- a/python/qemu/qmp.py
+++ b/python/qemu/qmp.py
@@ -181,10 +181,11 @@ def __get_events(self, wait: Union[bool, float] = False) -> None:
self.__sock.settimeout(wait)
try:
ret = self.__json_read(only_event=True)
- except socket.timeout:
- raise QMPTimeoutError("Timeout waiting for event")
- except:
- raise QMPConnectError("Error while reading from socket")
+ except socket.timeout as err:
+ raise QMPTimeoutError("Timeout waiting for event") from err
+ except Exception as err:
+ msg = "Error while reading from socket"
+ raise QMPConnectError(msg) from err
if ret is None:
raise QMPConnectError("Error while reading from socket")
self.__sock.settimeout(None)
--
2.26.2
next prev parent reply other threads:[~2020-10-20 17:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-20 17:27 [PULL 00/21] Python patches John Snow
2020-10-20 17:27 ` [PULL 01/21] MAINTAINERS: Add Python library stanza John Snow
2020-10-20 17:27 ` [PULL 02/21] python/qemu: use isort to lay out imports John Snow
2020-10-20 17:27 ` [PULL 03/21] python/machine.py: Fix monitor address typing John Snow
2020-10-20 17:27 ` [PULL 04/21] python/machine.py: reorder __init__ John Snow
2020-10-20 17:27 ` [PULL 05/21] python/machine.py: Don't modify state in _base_args() John Snow
2020-10-20 17:27 ` [PULL 06/21] python/machine.py: Handle None events in events_wait John Snow
2020-10-20 17:27 ` [PULL 07/21] python/machine.py: use qmp.command John Snow
2020-10-20 17:27 ` [PULL 08/21] python/machine.py: Add _qmp access shim John Snow
2020-10-20 17:27 ` [PULL 09/21] python/machine.py: fix _popen access John Snow
2020-10-20 17:27 ` [PULL 10/21] python/qemu: make 'args' style arguments immutable John Snow
2020-10-20 17:27 ` [PULL 11/21] iotests.py: Adjust HMP kwargs typing John Snow
2020-10-20 17:27 ` [PULL 12/21] python/qemu: Add mypy type annotations John Snow
2020-10-20 17:27 ` [PULL 13/21] python/qemu/console_socket.py: Correct type of recv() John Snow
2020-10-20 17:27 ` [PULL 14/21] python/qemu/console_socket.py: fix typing of settimeout John Snow
2020-10-20 17:27 ` [PULL 15/21] python/qemu/console_socket.py: Clarify type of drain_thread John Snow
2020-10-20 17:27 ` [PULL 16/21] python/qemu/console_socket.py: Add type hint annotations John Snow
2020-10-20 17:27 ` [PULL 17/21] python/qemu/console_socket.py: avoid encoding to/from string John Snow
2020-10-20 17:27 ` John Snow [this message]
2020-10-20 17:27 ` [PULL 19/21] python: add mypy config John Snow
2020-10-20 17:27 ` [PULL 20/21] python/qemu/qmp.py: re-raise OSError when encountered John Snow
2020-10-20 18:15 ` Nir Soffer
2020-10-20 19:06 ` John Snow
2020-10-20 17:27 ` [PULL 21/21] python/qemu/qmp.py: Fix settimeout operation John Snow
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