Can someone please explain to me this code?

[CTO]

> root.change_attributes(event_mask = X.KeyPressMask)

This asks X to send this application keypress events

> root.grab_key(keycode, X.AnyModifier, 1,X.GrabModeAsync, X.GrabModeAsync)

This tells X to grab the keyboard if the given keycode is generated
and
any modifier is pressed, not to stop processing keyboard events, and
not
to stop processing pointer events. That's pretty safe, although I'm
not
sure if you'd need the modifier for your application.