Display panel API commands.

I'm writing an addon and I want it to get rid of the grid floor. When I mouse over the checkbox I get: Python: SpaceView3D.show_floor bpy.data.screens["Default"] ... show_floor CTRL-C does for some stupid reason not copy the command and I cannot see the full command. switching on the debugging mode to see all commands in the console doesn't help either, these are still not displayed. How do I access those from a script?

Are you talking about the map grid on a page?  That's set on the Page object. However, the API requires a Pro Subscription.  Can you post a screenshot of where you are seeing the above?