use sys.exit and not just exit
use sys.exit and not just exit

harmishhk/catkin,asmodehn/catkin,ros/catkin,thaddeustaylor/catkin,wkentaro/catkin,scpeters/catkin,beni55/catkin,asmodehn/catkin,jack-oquin/catkin,shyamalschandra/catkin,shyamalschandra/catkin,scpeters/catkin,jack-oquin/catkin,ros/catkin,scpeters/catkin,thaddeustaylor/catkin,wkentaro/catkin,wkentaro/catkin,beni55/catkin,asmodehn/catkin,beni55/catkin,harmishhk/catkin,harmishhk/catkin,ros/catkin,jack-oquin/catkin,shyamalschandra/catkin,thaddeustaylor/catkin