Have K3, besides accidental backlight change, no issues at all. Small comfortable, multidevice support (always connected to my pc via cable, simple switch to BT connection to work Macbook).
Also not tried my self, but it looks like there is possible to reprogram backlight patterns with their software:
https://www.keychron.com/pages/how-to-program-the-backlight-...
Note: not a phyton, but PHP programmer here
I also recommend Rust, learning Rust just for little bit may change how you think and tend you to make better decisions when coding with language you are familiar with.