如何确定Python在Windows、Linux和MacOS中的显示空闲时间?

I would like to know how long it's been since the user last hit a key or moved the mouse - not just in my application, but on the whole "computer" (i.e. display), in order to guess whether they're still at the computer and able to observe notifications that pop up on the screen.I would like to know how long it's been since t