Fork of https://github.com/mutax/PyVisca. I had troubles using the original PyVisca from Python3, mainly for the way pyserial needs to handle bytes and byte arrays. I had major pains in many cases where the original lib was using chr()/ord() to perform conversion.
I found that by switching entirely to a "bytes" python type representation my life was easier.
The camera reference in my case is SONY FCB-EV7500 and many commands have been rewritten to work with this camera.
In addition to command string, I have added implemented some nquiry strings to be able to read camera settings.
This is not a comprehensive implementation of ALL camera functionalities but just of what was needed for my project, some commands may still be missing.
Register setting seems not to be applied even after a power-off/on cycle unless you physically switch the camera off/on.