Filter layer applies to multiple layers, but keep those layer isolated.
I am finding this kind of script, but nothing gained so far.
So, I decided to learn python to write that script. If you have the script, hope that you could give it to me, really appreciate it
but I got stuck at attempting to create layers when learning scripting, please help:

from krita import *
Krita.instance().activeDocument().createVectorLayer("NewLayer")