pyusb VS pclk-mn10

You can write python code that reads the data the scanner is sending, but it's not super simple getting up to speed on this. It might be best to search on python read usb hid device and start experimenting. The links found on the search lead to pyusb which has a tutorial. The first stumbling block is that the tutorial requires data about the device, such as idVendor and idProduct. You can write python code to find these values for your scanner if you don't know them, but you'll have to search on that.

(Not to make it about me but there is more knowledge lurking in my repository that's not in the command list, sadly neglected. I keep meaning to add support for multi-part commands so that track / display updates can be handled properly as per https://github.com/4gra/pclk-mn10/discussions/5 -- I'll get there one day. The way I see it one has to take the long view to still be in minidisc...).

No need. I'm software developer. Look Control A1 and PC-Link are standard infrared protocols over wire. And it is described here: http://www.hifi-remote.com/sony/Sony_dsp.htm , working computer software library here: https://github.com/4gra/pclk-mn10