the line length change doesn't make the world better... without pyflakes I already wondered, why there is an additional linebreak. now it needs two additional one to stay below 99
changes here are tested and work on Python 3.7.3 (debian buster).
in python3 filter returns an object, not an list. I think a list is required here? at least the plugin works as soon as list(...) is added.
need to change from pid to pid.decode, as pid is binary and not a string.
On Debian Stretch the cmdline is something like:
qemu-system-x86_64-enable-kvm-nameguest=vmname,debug-threads=on-S-[…]
Without null characters:
qemu-system-x86_64 -enable-kvm -name guest=vmname,debug-threads=on[…]
We need to match only guest=vmname, so the regex
"^.*guest=([a-zA-Z0-9.-_-]*).*$" is simpler and match the VM name.
The precedent regex "^.*-name\x00([a-zA-Z0-9.-_-]*)\x00\-.*$" was not matching it.
BTW, It seems that \x00 does not match correctly null characters so I removed it.
