[PATCH 1/1] Fix a trivial flake8 warning

[Norman]

At 2023-02-09 19:43:03, "Daniel P. Berrangé" <berrange at redhat.com> wrote:

>On Thu, Feb 09, 2023 at 12:39:04PM +0100, Erik Skultety wrote:
>> On Thu, Feb 09, 2023 at 10:00:27AM +0100, Martin Kletzander wrote:
>> ...
>> > > diff --git a/tools/virt-qemu-qmp-proxy b/tools/virt-qemu-qmp-proxy
>> > > index dfbaa1ff0c..2d9dd6495d 100755
>> > > --- a/tools/virt-qemu-qmp-proxy
>> > > +++ b/tools/virt-qemu-qmp-proxy
>> > > @@ -335,7 +335,7 @@ def main():
>> > >     sock.bind(args.sockpath)
>> > >     sock.listen(1)
>> > > 
>> > > -    _ = QMPProxy(conn, dom, sock, args.verbose)
>> > > +    QMPProxy(conn, dom, sock, args.verbose)
>> > > 
>> > 
>> > I don't think you can do that because the object could be garbage
>> > collected, but I'm not sure how much havoc would that cause...
>> 
>> Would it? Not advocating to accept the patch, but looking at the object it
>> passes a reference to itself to qemuMonitorEventRegister() so as long as the
>> monitor callback map exists the object should not be garbage collected. However
>> the usage of _ in this case is IMO quite unfortunate in that it's simply there
>> to really make sure Python holds one more explicit reference to the object. In
>> cases like these Python's context managers are used instead.
>
>Yep, using a context manager pattern there would have been more
>sane.
>
>
>With regards,
>Daniel
>-- 
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Thank you for reply. The warning I am seeing is 


208/279 libvirt:syntax-check / flake8                                         FAIL           1.53s (exit status 2)

--- command ---
13:12:22 /usr/bin/make -C /home/sjt/src/c/libvirt/build/build-aux sc_flake8
--- stdout ---
make: Entering directory '/home/sjt/src/c/libvirt/build/build-aux'
/home/sjt/src/c/libvirt/tools/virt-qemu-qmp-proxy:338:5: F841 local variable '_' is assigned to but never used
    _ = QMPProxy(conn, dom, sock, args.verbose)



the flake8 version is pretty old (3.5.0 (mccabe: 0.6.1, pycodestyle: 2.3.1, pyflakes: 1.6.0) CPython 3.6.9 on Linux)

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