Skill command in PCB editor using python scripting

Your question is way too general.

If you want to control OrCAD remotely, from a PY, here's how I'd do it (similar to what exists in TCL Capture):

1. Create a server in PY and open up a communication port/socket.

2. Connect OrCAD PCB to that port and listen for commands

3. On each side, you must define a protocol, one for sending commands (PY Side), and one for interpreting them (SKILL Side). Preferably, encapsulate them in such a way that SKILL knows what to do with each command. Most likely you will have to have the control loops in python and have SKILL run 1 command at a time.

4. Make sure SKILL is not in blocking mode (use IPC, period events etc) and make sure you can stop to process at anytime.

5. You definetly need a handshake protocol between the 2 apps, with information flying both ways, timeouts to ensure system doesn;t block, error handling etc.

And this is just the bird eye view, from 1000ft...

Other aproaches might exist too.