[PATCH 00/10] Python: delint iotests, machine.py and console_socket.py

[John Snow <jsnow@redhat.com>]

gitlab CI: https://gitlab.com/jsnow/qemu/-/pipelines/301924893
branch: https://gitlab.com/jsnow/qemu/-/commits/python-package-pre-cleanup

This series serves as a pre-requisite for packaging the python series
and getting the linters running via CI. The first patch fixes a linter
error we've had for a while now; the subsequent 9 fix a new warning that
was recently added to pylint 2.8.x.

If there's nobody opposed, I'll take it through my Python queue,
including the iotests bits.

John Snow (10):
  python/console_socket: avoid one-letter variable
  python/machine: use subprocess.DEVNULL instead of
    open(os.path.devnull)
  python/machine: use subprocess.run instead of subprocess.Popen
  python/console_socket: Add a pylint ignore
  python/machine: Disable pylint warning for open() in _pre_launch
  python/machine: disable warning for Popen in _launch()
  iotests: use subprocess.run where possible
  iotests: use 'with open()' where applicable
  iotests: silence spurious consider-using-with warnings
  iotests: ensure that QemuIoInteractive definitely closes

 python/qemu/console_socket.py    | 11 ++++---
 python/qemu/machine.py           | 28 ++++++++++------
 tests/qemu-iotests/iotests.py    | 55 +++++++++++++++++++-------------
 tests/qemu-iotests/testrunner.py |  1 +
 4 files changed, 57 insertions(+), 38 deletions(-)

-- 
2.30.2