Both scripts are structured the same, and function the same. When using the surface constraint script, select the MESH type object, then run the script through the text editor. When using the path constraint script, select the CURVE type object, and run the script through the text editor. Anytime you create a constraint for the camera controls or tracking controls, it will remove the previous constraints for cleanliness. You must set both camera variables or both tracking variables to False in order to remove all constraints.

armature_name = "rig.camera.000"

Change the name of the armature here should you rename the camera armature

camera_constraint = True

Change the Boolean operation  to True (create camera constraint) or False (don't create camera constraint)

remove_previous_camera_constraint = True

Change the Boolean operation to True (remove previous camera constraint) or False (don't remove previous camera constraint)

tracking_constraint = True

Change the Boolean operation  to True (create tracking constraint) or False (don't create tracking constraint)

remove_previous_tracking_constraint = True

Change the Boolean operation to True (remove previous tracking constraint) or False (don't remove previous tracking constraint)