I am new to Kicad, but I been working with kicad for two weeks already. I am using the scripting in pcbnew. What I am trying to do is change the name of a specific net using the python scripting. I been trying to find a function that sets a new name for a net, but I can’t find anything. I am not sure if this is even possible.
The board function GetNetClasses() should work for you. This is a dictionary of references to the netclasses in your board. You can re-assign the names directly.
I don’t know your workflow, but for me a net name change should be done at the schematic and the change pushed to the PCB. Unfortunately there is not (yet) a Python API for EESchema, but it should be coming in the next major version.