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[PATCH v7 02/31] python/machine: use subprocess.DEVNULL instead of open(
From: |
John Snow |
Subject: |
[PATCH v7 02/31] python/machine: use subprocess.DEVNULL instead of open(os.path.devnull) |
Date: |
Tue, 25 May 2021 20:24:25 -0400 |
One less file resource to manage, and it helps quiet some pylint >=
2.8.0 warnings about not using a with-context manager for the open call.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Message-id: 20210517184808.3562549-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
---
python/qemu/machine.py | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/python/qemu/machine.py b/python/qemu/machine.py
index b379fcbe726..5b87e9ce024 100644
--- a/python/qemu/machine.py
+++ b/python/qemu/machine.py
@@ -223,9 +223,8 @@ def send_fd_scm(self, fd: Optional[int] = None,
assert fd is not None
fd_param.append(str(fd))
- devnull = open(os.path.devnull, 'rb')
proc = subprocess.Popen(
- fd_param, stdin=devnull, stdout=subprocess.PIPE,
+ fd_param, stdin=subprocess.DEVNULL, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, close_fds=False
)
output = proc.communicate()[0]
@@ -391,7 +390,6 @@ def _launch(self) -> None:
"""
Launch the VM and establish a QMP connection
"""
- devnull = open(os.path.devnull, 'rb')
self._pre_launch()
self._qemu_full_args = tuple(
chain(self._wrapper,
@@ -401,7 +399,7 @@ def _launch(self) -> None:
)
LOG.debug('VM launch command: %r', ' '.join(self._qemu_full_args))
self._popen = subprocess.Popen(self._qemu_full_args,
- stdin=devnull,
+ stdin=subprocess.DEVNULL,
stdout=self._qemu_log_file,
stderr=subprocess.STDOUT,
shell=False,
--
2.31.1
- [PATCH v7 00/31] python: create installable package, John Snow, 2021/05/25
- [PATCH v7 02/31] python/machine: use subprocess.DEVNULL instead of open(os.path.devnull),
John Snow <=
- [PATCH v7 01/31] python/console_socket: avoid one-letter variable, John Snow, 2021/05/25
- [PATCH v7 03/31] python/machine: use subprocess.run instead of subprocess.Popen, John Snow, 2021/05/25
- [PATCH v7 04/31] python/console_socket: Add a pylint ignore, John Snow, 2021/05/25
- [PATCH v7 06/31] python/machine: disable warning for Popen in _launch(), John Snow, 2021/05/25
- [PATCH v7 05/31] python/machine: Disable pylint warning for open() in _pre_launch, John Snow, 2021/05/25
- [PATCH v7 08/31] iotests/297: add --namespace-packages to mypy arguments, John Snow, 2021/05/25
- [PATCH v7 07/31] python/machine: Trim line length to below 80 chars, John Snow, 2021/05/25
- [PATCH v7 09/31] python: create qemu packages, John Snow, 2021/05/25